U.S. patent application number 09/775966 was filed with the patent office on 2001-10-25 for portable, weather resistant golf practice device.
Invention is credited to Sobol, Raymond J..
Application Number | 20010034272 09/775966 |
Document ID | / |
Family ID | 22658657 |
Filed Date | 2001-10-25 |
United States Patent
Application |
20010034272 |
Kind Code |
A1 |
Sobol, Raymond J. |
October 25, 2001 |
Portable, weather resistant golf practice device
Abstract
A portable, weather resistant golf practice device is disclosed.
The golf practice device of the present invention includes a
multi-dimensionally adjustable practice platform that enables a
golfer to repetitively practice shots under conditions that
realistically simulate various combinations of uphill, downhill, or
side-hill lies, as well as various grass lengths and sand trap
conditions. The golf practice device of the present invention is
user programmable, relatively inexpensive, lightweight, easily
moved by one person, completely portable by two persons, and
exhibits enhanced weather resistance. The golf practice device of
the present invention minimizes height between the ground and the
top of the practice platform, or "step-up" height to provide a golf
practice device that is easily and comfortably used.
Inventors: |
Sobol, Raymond J.;
(Henderson, NV) |
Correspondence
Address: |
TRASK BRITT
P.O. BOX 2550
SALT LAKE CITY
UT
84110
US
|
Family ID: |
22658657 |
Appl. No.: |
09/775966 |
Filed: |
February 2, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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60179952 |
Feb 3, 2000 |
|
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Current U.S.
Class: |
473/278 |
Current CPC
Class: |
A63B 24/0021 20130101;
A63B 2220/35 20130101; A63B 2069/367 20130101; A63B 69/3694
20130101; A63B 69/3658 20130101; A63B 69/3652 20130101; A63B
2024/0031 20130101; A63B 69/3673 20130101; A63B 69/3661
20130101 |
Class at
Publication: |
473/278 |
International
Class: |
A63B 069/36 |
Claims
What is claimed is:
1. A portable golf practice device comprising: an adjustable
support assembly including a base and a platform support,
configured for multidimensional adjustment with respect to said
base, said platform support including a substantially continuous
and generally planar upper surface; a practice platform attached to
said platform support and including at least one drainage hole, a
standing area including a series of raised ribs, and a tray; a
synthetic grass and rubber mat removably placed in said standing
area over said series of raised ribs; an insert removably placed in
said tray, said insert simulating one or more lengths of grass or
sand trap conditions; and an electronic control unit (ECU)
configured for control of the multi-dimensional movement of the
platform support and practice platform attached thereto.
2. The portable golf practice device of claim 1, wherein said
adjustable support assembly further includes at least two actuators
operably coupled to said ECU that may be independently,
electronically controlled thereby, said actuators being positioned
underneath said platform support and between said platform support
and said base.
3. The portable golf practice device of claim 2, wherein said
adjustable support assembly further comprises a central universal
joint, said central universal joint being positioned under said
platform support and between said platform support and said
base.
4. The portable golf practice device of claim 1, wherein said base
comprises a first frame and said platform support comprises a
second frame with a platform member being attached to said second
frame of said platform support.
5. The portable golf practice device of claim 2, further comprising
a bellows attached to and extending between said base and said
platform support, said bellows substantially enclosing said at
least two actuators.
6. The portable golf practice device of claim 2, wherein said base
further comprises at least one wheel assembly.
7. The portable golf practice device of claim 2, wherein said ECU
comprises a processor, machine readable memory, and a user
interface.
8. The portable golf practice device of claim 7, wherein said user
interface is configured to generate signals corresponding to user
inputs and said processor is operably coupled to said user
interface to receive said generated signals, processing said
generated signals, and control adjustment of the practice platform
in responsive to the user inputs.
9. A portable golf practice device comprising: a platform support
configured for multi-dimensional adjustment, said platform support
being generally planar and having a substantially continuous upper
surface. a base extending under said platform support and including
a substantially horizontal portion extending between a first raised
portion and an opposing second raised portion, said second raised
portion including a first overhang; a first mounting point located
at said first raised portion of said base, said first mounting
point including a first universal joint attached to a first end of
said platform support; at least two actuators overlying said
platform support and attached to said first overhang, said at least
two actuators including distal ends including additional universal
joints, said additional universal joints serving as additional
mounting points and being attached to a second, opposing side of
said platform support; a practice platform attached to said
platform support; and an electronic control unit (ECU) operably
coupled to said at least two actuators and configured for
controlling the multi-dimensional movement of the platform support
and practice platform attached thereto.
10. The golf practice device of claim 9, wherein said practice
platform comprises at least one drainage hole, a standing area
including a series of raised ribs, a tray, a mat removably placed
over said series of raised ribs in said standing area, and an
insert removably placed in said tray, said insert simulating one or
more lengths of grass or sand trap conditions.
11. The portable golf practice device of claim 9, wherein said
first raised portion of said base further comprises a second
overhang, said second overhang having a third actuator mounted
thereto, said third actuator having a distal end serving as said
first mounting point incorporating said first universal joint.
12. The portable golf practice device of claim 9, wherein said
first raised portion of said base further comprises a second
overhang, said second overhang having third and fourth actuators
mounted thereto, said third actuator having a distal end serving as
said first mounting point incorporating said first universal joint
and said fourth actuator having a distal end including a fourth
mounting point incorporating a fourth universal joint.
13. The portable golf practice device of claim 9, wherein said base
comprises a frame structure and said platform support comprises a
generally planar and substantially continuous sheet of
material.
14. The portable golf practice device of claim 9, further
comprising a bellows attached to and extending between said first
overhang and said platform support, said bellows substantially
enclosing said at least two actuators.
15. The portable golf practice device of claim 11, further
comprising a first bellows and a second bellows, said first bellows
attached to and extending between said first over hang and said
platform support and said second bellows attached to and extending
between said second overhang and said platform support.
16. The portable golf practice device of claim 9, wherein said base
further comprises at least one wheel assembly.
17. The portable golf practice device of claim 9, wherein said ECU
comprises a processor, machine readable memory, and a user
interface.
18. The portable golf practice device of claim 17, wherein said
user interface is configured to generate signals corresponding to
user inputs and said processor is operably coupled to said user
interface to receive said generated signals, processing said
generated signals, and control adjustment of the practice platform
in responsive to the user inputs.
19. The portable golf practice device of claim 17, wherein said
machine readable memory of said ECU includes a plurality of
pre-programmed practice routines, each of said pre-programmed
practice routines being selectable from said user interface and
comprising a plurality of pre-programmed practice platform
positions simulating various different golf course conditions.
20. The portable golf practice device of claim 7, wherein said
machine readable memory of said ECU includes a plurality of
pre-programmed practice routines, each of said pre-programmed
practice routines being selectable from said user interface and
comprising a plurality of pre-programmed practice platform
positions simulating various different golf course conditions.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] Under the provisions of 35 U.S.C. .sctn.119(e), priority is
claimed from U.S. Provisional Patent Application Serial No.
60/179,952, filed on Feb. 2, 2000.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a golf practice device.
Specifically, the present invention relates to a portable, weather
resistant golf practice device including a practice platform
capable of electronically controlled multi-dimensional
adjustment.
[0004] 2. State of the Art
[0005] In order to improve the consistency, distance, and accuracy
of their golf shots, it is essential for golfers to spend a
considerable amount of time practicing. It is accepted by many that
the best environment for such practice is the golf course itself.
This is true because golf courses generally encompass a variety of
terrain, including uphill, downhill, and sidehill grades, varying
lengths of grass, and sand traps of diverse grades and shapes, and
it is difficult to simulate such conditions in an off-course
environment. However, playing a round of golf is time consuming and
can be expensive. Moreover, because the objective in golf is to
complete a round with the least amount of strokes, playing a round
of golf does not provide the golfer an effective opportunity to
repetitively practice shots made under particular combinations of
course conditions.
[0006] Practice ranges provide a partial solution to golfers'
practice needs. In general, practice ranges are easily accessed,
inexpensive, and enable the golfer to spend as much or as little
time practicing as desired. Additionally, practice ranges provide
an excellent environment for repetitive practice.
[0007] However, practice ranges are not without disadvantages. For
instance, practice ranges generally simulate only the most ideal
conditions on a golf course (i.e., the tee-boxes provided on
practice ranges are generally level and can not simulate the
varying grades, grass lengths, or sand traps encountered on a golf
course). Even where practice ranges include practice areas
providing some terrain diversity, the shots a golfer can practice
at such facilities are still limited by the terrain provided, and
where a practice range includes diverse practice areas, these areas
are often surfaced with natural turf, which is difficult and
expensive to maintain. Moreover, traveling to and from a practice
range only to have to move from one practice area to another is
inconvenient for many. Therefore, it would be desirable to provide
a device that enables a golfer to repetitively practice shots that
accurately simulate the varying uphill, downhill, or sidehill lies,
grass lengths, and sand traps encountered on a golf course without
having to play a round of golf, move from area to area within a
practice range, or even visit a practice range at all.
[0008] Several devices have been developed in an attempt to answer
this need. For example, U.S. Pat. Nos. 5,720,670, 5,470,074,
5,358,251, 5,340,111, 4,875,684, and 3,633,918 disclose golf
practice devices incorporating adjustable platforms upon which a
golfer may stand to repetitively practice shots simulating various
combinations of course conditions. However, each of the devices
taught in these patents suffers shortcomings which diminish its
value to the user. In particular, none of the devices embodies a
golf practice device that is comfortable to use, weather resistant,
programmable, sufficiently lightweight and portable to be useful in
practice range and backyard environments, and capable of simulating
varying uphill, downhill, and sidehill grades, as well as varying
grass lengths and sand trap conditions. Therefore, the devices
disclosed in these patents have not enjoyed widespread
commercialization, and a golf practice device which embodies all of
these described characteristics would be an improvement in the
art.
SUMMARY OF THE INVENTION
[0009] The portable, weather resistant golf practice device of the
present invention includes a practice platform, an adjustable
support assembly, and an electronic control unit. The practice
platform is sized to provide a practice area wherein a user can
address a golf ball and practice various golf shots. Due to the
construction of the golf practice device of the present invention,
the height between the ground and the top of the practice platform,
or "step-up" height, is substantially reduced relative to existing
devices, making the golf practice device of the present invention
easier and more comfortable to use. Moreover, the practice platform
may include a device allowing the simulation of various grass
lengths or sand-trap conditions. Through adjustment of the
adjustable support assembly, the practice platform may be moved
multi-dimensionally to accurately simulate a wide variety of uphill
lies, downhill lies, or sidehill lies, including combinations of
uphill or downhill and sidehill lies. Adjustment of the adjustable
support assembly is carried out using the electronic control unit
and may be manually executed or automatically executed using a
pre-programmed routine. Thus, the golf practice device of the
present invention is weather resistant, portable, comfortable to
use, accurately simulates a wide range of golf shots, including
shots taken from a variety of uphill, downhill, or sidehill lies.
The golf practice device of the present invention enables a user to
practice such shots without playing a round of golf and without
moving from one area to another within a practice facility, or,
when used in a home environment, without even visiting a practice
facility.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In the drawings:
[0011] FIG. 1 illustrates a first embodiment of the golf practice
device of the present invention;
[0012] FIG. 2 through FIG. 5 illustrate adjustable support
assemblies useful in conjunction with the first embodiment of the
golf practice device of the present invention;
[0013] FIG. 6 and FIG. 10 illustrate a second embodiment of the
golf practice device of the present invention;
[0014] FIG. 7 through FIG. 9 illustrate adjustable support
assemblies useful in conjunction with the second embodiment of the
golf practice device of the present invention;
[0015] FIG. 11 illustrates a practice platform of the golf practice
device of the present invention;
[0016] FIG. 12 provides a cross-section view of a portion of the
standing area of a practice platform of the golf practice device of
the present invention;
[0017] FIG. 13 through FIG. 15 illustrate different inserts useful
in conjunction with the practice platform of the golf practice
device of the present invention;
[0018] FIG. 16 illustrates an exemplary user interface included in
the electronic control unit of the golf practice device of the
present invention; and
[0019] FIG. 17 provides a schematic illustration of an embodiment
of the golf practice device according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0020] A first embodiment of the golf practice device of the
present invention is illustrated in FIG. 1. As in each of the
embodiments of the present invention, the golf practice device 10
according to the first embodiment includes an adjustable support
assembly 12, a practice platform 14, and an electronic control unit
16. As can be appreciated by reference to FIG. 1, the adjustable
support assembly 12 of the first embodiment of the golf practice
device 10 of the present invention underlies the practice platform
14, supporting the practice platform 14 from underneath.
[0021] Exemplary adjustable support assemblies 12 that may be used
in the first embodiment of the present invention are illustrated in
FIG. 2 and FIG. 3. The adjustable support assemblies 12 include a
base 18, a platform support 20, a central universal joint 22, and
at least two independent actuators 24a, 24b capable of manipulating
the position of the platform support 20. The central universal
joint 22 is positioned between the base 18 and the platform support
20 and allows the platform support 20 to move multi-dimensionally
relative to the base. As it is used herein, the term "universal
joint" refers to any joint or bearing which facilitates
simultaneous movement about at least two different axes.
[0022] As is shown in FIG. 2 and FIG. 3, the base 18 and platform
support 20 of the adjustable support assembly 12 of the first
embodiment of the present invention may include frame structures
constructed of structural members. The construction of the base 18
and platform support 20, however, is not so limited. For example,
the base 18 and platform support 20 may also be constructed of a
generally planar sheet of material. Moreover, the base 18 may
include any structure providing a suitable mounting point (i.e.,
sufficiently robust to withstand the significant stresses imposed
during use of the golf practice device 10 of the present invention)
for the actuators 24a, 24b or central universal joint 22 of the
adjustable support assembly 12. For instance, instead of a frame
structure or generally planar sheet of material, the base 18 may be
a concrete slab, a metal or concrete post, or even the deck of a
boat or ship. It is preferred, however, to construct the base 18
and platform support 20 of the adjustable support assembly 12 of
the first embodiment of the present invention using frame
structures, as such a construction yields a relatively lightweight,
yet durable, adjustable support assembly 12.
[0023] In addition, any material or combination of materials may be
used to construct the base 18 or platform support 20 of the
adjustable support assembly 12 of the first embodiment, as long as
such materials are weather resistant, corrosion resistant, and
sufficiently robust to produce a base 18 and platform support 20
capable of withstanding the stresses exerted during use of the golf
practice device 10 of the present invention. For example, coated
steel, stainless steel, aluminum alloy, titanium alloy, composite
materials, polymer materials, or any combination thereof may be
used to fabricate the base 18 or platform support 20, and where the
base 18 or platform support are fabricated of generally planar
sheet material, composite structural materials, such as those
manufactured by M.C. Gill Corp. of El Monte, Calif. USA, for
example, are preferably used. Moreover, the base 18 and platform
support 20 may be fabricated using any suitable fabrication
technique, such as, for example, any known cutting, welding,
riveting, or bonding techniques. However, it is presently preferred
to construct the adjustable support assembly 12 of the first
embodiment using a base 18 and platform support 20 constructed of
welded steel structural members 30 provided with a suitable
corrosion resistant coating.
[0024] Where the platform support 20 of the adjustable support
assembly 12 includes a frame structure, the platform support 20
also preferably includes a platform member 32 (illustrated in FIG.
4). The platform member 32 may be affixed to the frame structure of
the platform support 20 by means known in the art, such as, for
example, rivets, bolts, screws, or welds. As can be seen in FIG. 4,
the platform member 32 includes an upper surface 38 which is
continuous and substantially planar, as well as an outer perimeter
formed by a flange 42 extending downward and generally
perpendicularly away from the upper surface 38. It is preferred
that the flange 42 be continuous with the remainder of the platform
member 32.
[0025] The platform member 32 may also be constructed using
materials and methods known in the art and may be attached to the
frame structure by any known means, provided that the materials and
means used result in a platform member 32 that is corrosion
resistant, weather resistant, and able to withstand the stresses
exerted during use of the golf practice device of the present
invention. For example, the platform member 32 may be constructed
of separate pieces of metal stock that are cut and welded to form a
platform member 32 having a continuous and substantially planar
upper surface 38 and an outer perimeter formed by a downwardly
extending flange 42, or substantially the same result may be
achieved using a single piece of metal stock, which is cut, bent,
and welded to the appropriate size and shape. Additionally, the
platform member 32 may be constructed of any suitable polymer or
composite materials, such as, for example, the composite structural
materials manufactured by M.C. Gill Corp. However, it is presently
preferred to fabricate the platform member 32 by welding multiple
pieces of aluminum stock together. It is further preferred to mount
the platform member 32 to the frame structure of the platform
support 20 using stainless steel rivets.
[0026] The continuous nature of the upper surface 38 and flange 42
of the platform member 32 is significant. Such a design easily
sheds water, dirt and debris away from electrical or mechanical
systems underlying the platform support 20. Several existing golf
practice devices include platforms that are compromised by
perforations or holes made to accommodate tees, ball holders, foot
switches, grass adjusting mechanisms, and the like. Each such
perforation or hole in the platform serves as an additional avenue
for water, dirt, and debris to pass through the platform and
contact the associated mechanical and electrical systems underlying
the platform of these existing devices. Therefore, the
substantially continuous, uncompromised platform member 32
surrounded by a downward extending flange 42, as shown in FIG. 4,
results in a golf practice device which is substantially resistant
to incursions of water, dirt, and debris.
[0027] Where the platform support 20 of the adjustable support
assembly 12 of the first embodiment is formed from a generally
planar sheet of material, there is no need to provide a platform
member 32. However, even where the platform support 20 of the
adjustable support assembly 12 of the first embodiment of the
present invention is constructed using a generally planar sheet of
material, it is preferred that the platform support 20 include a
flange that is continuous with a top surface of the platform
support 20, extends around the perimeter of the platform support
20, and extends downward and generally perpendicularly away from
the top surface of the platform support 20.
[0028] As illustrated in FIG. 2 and FIG. 3, the central universal
joint 22 included in the adjustable support assembly 12 of the
first embodiment may be established by providing a joint which
enables simultaneous pivoting about a first horizontal axis 44 and
a second horizontal axis 46, the horizontal axes 44, 46 being
positioned substantially orthogonally relative to one another. Such
a central universal joint 22 is preferably mounted to the base 18
and the platform support 20 using pivotal or spherical bearings 48.
However, the adjustable support assembly 12 may be fabricated using
any combination of universal joint and mounting means known in the
art that allows the platform support 20 to simultaneously move
about at least two axes (i.e., multi-dimensionally) relative to the
base 18. Also, the central universal joint 22 not only allows the
platform support 20 to move multi-dimensionally relative to the
base 18, but serves as a load bearing member supporting the
platform support 20, the practice platform 14, and a golfer.
Therefore, the central universal joint 22, as well as any mounting
means, such as the pivotal or spherical bearings 48 used to affix
the central universal joint 22 to the base 18 and the platform
support 20, should be fabricated using materials providing a
structure capable of adequately supporting the platform support 20,
the practice platform 14, and a golfer as the platform support 20
and practice platform 14 are adjusted multi-dimensionally relative
to the base 18.
[0029] Though more may be used, the adjustable support assembly 12
of the golf practice device of the first embodiment at least two
actuators 24a, 24b mounted to the adjustable support assembly 12.
For example, as shown in FIG. 2, the actuators 24a, 24b may be
mounted to the base 18 and the platform support 20 of the
adjustable support assembly 12 using spherical or pivotal bearings
48. Alternatively, as shown in FIG. 3, the actuators 24a, 24b may
be mounted to the central universal joint 22 and either the
platform support 20 or the base 18 of the adjustable support
assembly 12. In such a design, the first actuator 24a is mounted to
the base 18 at its proximal end 47a and to the central universal
joint 22 at its distal end 51a, and the second actuator 24b is
mounted to platform support 20 at its proximal end 47b and to the
central universal joint 22 at its distal end 51b. Where the design
depicted in FIG. 3 is used, it is preferred to mount the distal
ends 5la, 51b of the actuators 24a, 24b to the central universal
joint 22 using clevis-type joints 49, while the proximal ends 47a,
47b are preferably mounted to the base 18 and platform support 20
using pivotal or spherical bearings 48.
[0030] The actuators 24a, 24b included in the adjustable support
assembly 12 of the first embodiment are bi-directional actuators
and may be placed under independent, electronic control. As the
actuators 24a, 24b are independently controlled to extend or
retract, the platform support 20 is moved multi-dimensionally
through the range of motion afforded by the central universal joint
22. Moreover, as the platform support 20 achieves a desired
position, the actuators 24a, 24b serve to maintain the platform
support 20 in place. Thus, the actuators 24a, 24b and their
mounting means must be robust enough to withstand the significant
stresses imposed as the practice platform 20 is moved and
maintained in place during use of the golf practice device 10 of
the present invention.
[0031] Though several known actuators (e.g., actuators including
hydraulic cylinders, pneumatic cylinders, or mechanical drives) and
mounting means may be used under such conditions, actuators
including mechanical drives, particularly those comprising a lead
screw and an electromagnetic motor, are presently preferred (SKF
USA, Inc. of Bethlehem, Pa., USA, distributes a range of such
actuators that are well suited for application in the present
invention). Actuators including mechanical drives are preferred
over pneumatic or hydraulic actuators because they are capable of
consistently providing precise linear adjustments of over wide
temperature ranges without recalibration. This performance
characteristic, in turn, results in precise angular adjustments to
the platform support that are repeatable over wide temperature
ranges without recalibration. In addition, actuators including
mechanical drives result in a weight savings over pneumatic or
hydraulic actuators, which generally must be significantly larger
and heavier than actuators including mechanical drives in order to
handle the same operational stresses.
[0032] Though the adjustable support assembly 12 of the first
embodiment of the present invention has been described as including
a central universal joint 22, the adjustable support assembly 12 is
not limited by such a design. For example, where the adjustable
support assembly 12 includes three or more actuators 24a-24c (shown
in FIG. 5), the need for a central universal joint may be
obviated.
[0033] FIG. 5 illustrates an adjustable support assembly 12 having
three actuators 24a-24c positioned between and mounted to the base
18 and the platform support 20, but as is easily appreciated, the
adjustable support assembly 12 of FIG. 5 lacks a universal joint
mounted to both the platform support 20 and the base 18. As before,
the actuators 24a-24c are bi-directional actuators that may be
independently, electronically controlled.
[0034] The actuators 24a-24c are preferably mounted to the base 18
and the platform support 20 using pivotal or spherical bearings 48.
However, any mounting means known in the art allowing the actuators
24a-24c to move the platform support 20 multi-dimensionally may be
used. Further, the actuators 24a-24c are positioned about the
adjustable support assembly to maximize multi-dimensional movement
of the platform support 20 relative to the base 18 while retaining
stability. For example, as is illustrated in FIG. 5, the first
actuator 24a may be positioned and mounted near a first end 50 of
the platform support 20 and base 18, while the second and third
actuators 24b, 24c are positioned and mounted near a second end 52
of the platform support 20 and base 18. In such a design, the first
actuator 24a may be used to control the elevation of the first end
50 of the platform support, and the second and third actuators 24b,
24c are used to control the elevation of the second end 52 of the
platform support 20 while simultaneously controlling the
inclination or declination between the front side 54 of the
platform support 20 and the back side 56 of the platform support
20. Though only three actuators 24a-24c are illustrated in FIG. 5,
more than three actuators may be used as desired, and the relative
positions of the actuators between the base 18 and platform support
20 may be varied depending on the size and shape of the platform
support 20 or base 18, or the amount of adjustability desired.
[0035] The adjustable support assembly 12 of the first embodiment
of the present invention also includes a protective curtain or
bellows 60 mounted to and extending between the platform support 20
and the base 18 (shown in FIG. 1). As is shown in FIG. 1, the
bellows 60 preferably peripherally surrounds the electrical and
mechanical systems of the adjustable support assembly, and may be
mounted about the outer perimeters of the frames (hidden from view
in FIG. 1) of both the platform support 20 and the base 18 of the
adjustable support assembly 12. Further, the bellows 60 is
preferably securely affixed to both the base 18 and the platform
support 20, thereby minimizing the possibility of injury to the
user of the present invention or passers-by which may result from
contact with any electrical or mechanical system associated with
the adjustable support assembly 12. The secure, substantially
continuous affixation of the bellows 60 also protects such systems
from fouling by weather, dust, debris, vandals, or small animals,
problems which have been reported in existing devices lacking such
a feature.
[0036] A variety of materials known in the art may be used to make
the bellows 60. For example, the bellows 60 is preferably
fabricated using either a flexible polymer material or a fabric.
The material used for the bellows 60 is preferably resistant to UV
light degradation, durable, and weather resistant. Where fabric is
used, it may be inherently weather resistant or it may be coated or
laminated in order to achieve resistance to the elements. For
example, a heavy-duty, coated synthetic fabric, such as nylon
laminated with a breathable GORE-TEX.TM. membrane or rubber coated
nylon that is moisture and air impermeable, depending on the
environment in which the golf device is to be used. Further, where
polymer material is used to create the bellows 60, UV-stabilized,
impact-modified ABS or high density polyethylene (HDPE) is
preferred. In order to provide a durable area for attachment to the
base 18 and the platform support 20, the bellows 60 may include
reinforcing members, such as, for example, eyelets or grommets.
Further, the where fabric is used for the bellows 60, the area of
attachment may be reinforced by, for example, a dual cloth layer, a
rope, a cable, or other elongated element sewn into a hem.
Alternatively, where the bellows 60 is made from a polymer
material, reinforcement may also be provided by simply including
areas of increased material thickness where the bellows 60 is to be
attached to the base 18 and platform support 20.
[0037] Presently, the first embodiment of the golf practice device
of the present invention is provided with an adjustable support
assembly 12 having a bellows 60 constructed of a synthetic fabric
having polymer strips as reinforcing members. The polymer strips
are sewn into the fabric of the bellows 60 in the areas where the
bellows 60 is attached to the base 18 and the platform support 20.
The bellows 60 is then permanently affixed to the base 18 and the
platform support 20 by driving screws or rivets through the areas
of the bellows 60 reinforced by the polymer strips and into the
base 18 and the platform support 20.
[0038] A practice platform 14 is attached to the platform support
20 of the first embodiment of the golf practice device 10 of the
present invention (shown in FIG. 1). The practice platform 14,
therefore, may be articulated through the multi-dimensional range
of motion of the platform support 20 upon extension or retraction
or one or more of the actuators (hidden from view in FIG. 1)
included in the adjustable support assembly 12. The practice
platform 14 is attached to the platform support 20 by any suitable
means known in the art. For example, the practice platform 14 may
be bolted, screwed, riveted, bonded, or welded to the platform
support 20. Riveting the practice platform 14 to the platform
support 20 using stainless steel rivets is presently preferred
because it provides a rugged, weather resistant, and permanent
attachment of the practice platform 14 to the platform support 20.
Riveting also results in a practice platform 14 that is less
susceptible to vibration and less likely to partially or completely
detach due to the loosening of screws or bolts over time.
[0039] A second embodiment of the golf practice device 10 of the
present invention is illustrated in FIG. 6. The second embodiment
also includes an adjustable support assembly 12, a practice
platform 14, and an electronic control unit 16. As can be seen in
FIG. 7, the adjustable support assembly 12 of the second embodiment
includes a base 18, a platform support 20, and two or more
actuators 24a, 24b. However, unlike that of the first embodiment,
the adjustable support assembly 12 of the second embodiment of the
golf practice device 10 of the present invention is not contained
entirely underneath the practice platform 14.
[0040] The base 18 of the adjustable support assembly 12 of the
second embodiment includes a substantially horizontal portion 89, a
first elevated portion 90, and a second elevated portion 92
opposing the first elevated portion 90. The substantially
horizontal portion 89 of the base 18 extends between the first
elevated portion 90 and the second elevated portion 92. Thus, the
substantially horizontal portion 89 of the base 18 serves to locate
and maintain the first and second elevated portions 90, 92 in their
desired positions and supports the first and second elevated
portions 90, 92 as such portions bear stresses exerted by and on
the platform support 20 during use of the golf practice device
10.
[0041] As shown in FIG. 7, the first elevated portion 90 of the
base 18 may simply extend upward and away from the substantially
horizontal portion 89 of the base 18. Further, the first elevated
portion includes a first mounting point 96a positioned at a desired
distance above the substantially horizontal portion 89 of the base
18. The first mounting point 96a includes a universal joint 100,
such as, for example, a spherical bearing or Heim joint.
[0042] While the second elevated portion 92 of the base 18 also
extends upwardly and away from the substantially horizontal portion
89 of the base 18, the second elevated portion additionally
includes a first overhang 104 extending back over the substantially
horizontal portion 89. Two actuators 24a, 24b are mounted to the
first overhang 104 in such a way that the actuators 24a, 24b extend
generally down and away from the first overhang 104. The actuators
24a, 24b are preferably mounted using pivotal or spherical bearings
48, but the actuators 24a, 24b may also be mounted by any other
means known in the art that enable independent extension and
contraction of the actuators 24a, 24b after the platform support 20
is mounted to the base. The distal ends 108a, 108b of the actuators
24 provide second and third mounting points 96a, 96b, each
including a universal joint 100, such as, for example, a spherical
bearing or Heim joint.
[0043] The platform support 20 is mounted to the base 18 of the
adjustable support assembly 12 of the second embodiment using the
mounting points 96a-96c. The platform support 20 includes a first
end 110 and a second end 112, which opposes the first end 110. The
first end 110 is mounted to base via the first mounting point 96a
provided at the first elevated portion 90, and the second end 112
is mounted to the base via that second and third mounting points
96b, 96c provided at the distal ends 108a, 108b of the actuators
24a, 24b. Because each of the mounting points 96a-96c is located at
a desired distance above the substantially horizontal portion 89 of
the base 18, mounting the platform support 20 to the base 18 via
the mounting points 96a-96c suspends the platform support 20 above
the substantially horizontal portion 89 of the base 18. As will be
appreciated by those of skill in the art, controlled, independent
extension and retraction of the actuators 24a, 24b facilitates
multi-dimensional movement of the platform support 20, enabling the
platform support 20 to accurately simulate various uphill,
downhill, and sidehill grades.
[0044] As shown in FIG. 8 and FIG. 9, the adjustable support
assembly 12 of the second embodiment of the present invention may
also utilize more than two actuators 24a-24d. Instead of having a
first elevated portion 90 that simply extends upwardly and away
from the substantially horizontal portion 89 of the base 18, the
first elevated portion 90 of a base 18 of an adjustable support
assembly 12 of the second embodiment may also include a second
overhang 105 extending back over the substantially horizontal
portion 89 of the base 18. Three or more actuators 24a-24d are
mounted at the first and second overhangs 104, 105 in such a way
that the actuators 24a-24d extend generally down and away from the
overhangs 104, 105. As before, the actuators 24a-24d are preferably
mounted using pivotal or spherical bearings 48 but may be mounted
by any means known in the art that enable the actuators 24a-24d to
adjust the platform support 20 multi-dimensionally relative to the
base 18. The distal ends 108a-108d of the actuators 24a-24d include
mounting points 96a-96d, which include a universal joint 100, such
as, for example, a spherical bearing or a Heim joint. First and
second opposing ends 110, 112 of the platform support 20 are
mounted to the mounting points 96a-96d to provide a platform
support 20 suspended above the substantially horizontal portion 89
of the base 18, the platform support 20 being capable of
multi-dimensional movement relative to the base 18 upon extension
or retraction of one or more of the actuators 24a-24d.
[0045] The actuators 24a-24d used in the adjustable support
assembly of the second embodiment of the present invention are
bi-directional actuators that may be placed under independent,
electronic control. Again, though any known bi-directional actuator
capable of withstanding the operational stresses experienced during
use of the golf practice device of the present invention may be
used (e.g., actuators including hydraulic cylinders, pneumatic
cylinders, or mechanical drives), it is presently preferred to use
actuators including mechanical drives for those reasons already
explained.
[0046] Even though the base 18 of the adjustable support assembly
12 of the second embodiment of the golf practice device of the
present invention is illustrated in FIG. 5 through FIG. 8 as
including a frame structure, the construction of the base 18 is not
so limited. For instance, instead of a frame structure, the base
18, or one or more portions thereof, may be constructed using
generally planar sheets of material, or a combination of frame
structures and generally planar sheets of material. Moreover, the
substantially horizontal portion 89 of the base 18 may comprise,
for instance, a concrete slab or even the deck of a ship or boat
having the first and second elevated portions 90, 92 of the base 18
attached thereto. Regardless of its configuration, the base 18 of
the adjustable support assembly 12 of the second embodiment may be
constructed using any materials or fabrication means known in the
art, including, for example, those discussed in relation to the
first embodiment. It is preferred that such materials and
fabrication means result in a base 18 that is weather resistant,
corrosion resistant and able to withstand the stresses exerted
during use of the golf practice device of the present
invention.
[0047] The platform support 20 of the adjustable support assembly
12 of the second embodiment of the present invention may be
constructed as a frame structure having a platform member fastened
thereto, as is described in conjunction with the first embodiment.
However, as is illustrated in FIG. 7 through FIG. 9, it is
presently preferred to construct the platform support 20 using a
single substantially planar sheet of material. Though various metal
alloys, composites, and polymer materials known in the art may be
used to create a substantially planar sheet suitable for use as a
platform support 20, composite structural materials such as, for
example, those manufactured by M.C. Gill Corp. are preferred.
[0048] Where the base 18 of the adjustable support assembly 12 of
the second embodiment of the present invention is constructed of a
frame structure, protective panels may be affixed to the first and
second elevated portions 92, 94 of the base. Such protective panels
serve to inhibit access to the mechanical and electrical systems
included in the adjustable support assembly 12 and work to minimize
or prevent injuries due to contact with such systems.
[0049] As a further protection, the base 18 of the adjustable
support assembly 12 of the second embodiment of the present
invention also includes bellows 60 attached to and extending
between the platform support 20 and any overhangs having actuators
mounted thereto. As is shown in FIG. 6, and FIG. 10, the bellows 60
preferably peripherally surround the electrical and mechanical
systems (hidden from view in the figures) underlying the overhangs
104, 105. For example, the bellows 60 may be mounted about the
underside of the overhangs 104, 105 and also to an upper surface of
the platform support 20. Further, the bellows 60 is preferably
securely affixed to the overhangs 104,105 and the platform support
20, thereby minimizing the possibility of injury which may result
from contact with any electrical or mechanical system enclosed by
the bellows 60. The secure, substantially continuous affixation of
the bellows 60 also protects such systems from damage or fouling by
weather, dust, debris, vandals, or small animals, problems which
have been reported in existing devices lacking such a feature.
[0050] As is true of the bellows 60 of the first embodiment, a
variety of materials known in the art may be used to make the
bellows 60 of the adjustable support assembly 12 of the second
embodiment. For instance a flexible polymer material or fabric may
be used. However, whatever material is used, it is preferably
resistant to UV light degradation, durable, and weather resistant.
As before, where fabric is used, it may be inherently weather
resistant or it may be coated or laminated in order to achieve
resistance to the elements. For example, a heavy-duty, coated
synthetic fabric, such as, for example, nylon laminated with a
breathable GORE-TEX.TM. membrane or rubber coated nylon that is
impermeable to air and moisture, depending on the environment in
which the golf device is to be used. Further, where a polymer
material is used to create the bellows 60, UV-stabilized,
impact-modified ABS or HDPE are preferred. Moreover, the bellows 60
may be attached to the platform support 20 and overhangs 104, 105
using any known means, and if necessary, may include reinforcing
members, such as those described in relation to the first
embodiment.
[0051] Like the practice platform 14 of the first embodiment, the
practice platform 14 of the second embodiment of the golf practice
device 10 of the present invention is attached to the platform
support 20 (shown in FIG. 6 and FIG. 10). The practice platform 14,
therefore, is articulated through the multi-dimensional range of
motion of the platform support 20 upon extension or retraction of
one or more of the actuators (hidden from view in FIG. 6 and FIG.
10) included in the adjustable support assembly 12. As was true
with regard to the first embodiment, the practice platform 14 of
the second embodiment is attached to the platform support 20 by any
suitable means known in the art. For example, the practice platform
14 may be bolted, screwed, riveted, bonded, or welded to the
platform support 20. Again, riveting the practice platform 14 to
the platform support 20 using stainless steel rivets is presently
preferred.
[0052] Though each of the embodiments described herein includes
advantages over prior art devices, the second embodiment of the
golf practice device of the present invention is presently
preferred. A problem associated with prior art golf practice
devices having adjustable practice platforms is that the height
between the ground and the top of the practice platform, or
"step-up height", was often so large as to produce anxiety or
sensations of imbalance in users. Advantageously, the design of the
adjustable support assembly of the first embodiment of the present
invention can reduce the step-up height to eleven inches or less.
However, because the actuators included in the adjustable support
assembly of the first embodiment are located underneath the
platform support, the step-up height of a golf practice device
according to the first embodiment must be at least as high as the
underlying actuators. In contrast, the actuators included in the
adjustable support assembly of the second embodiment of the present
invention are positioned over the platform support, and, as a
consequence, the minimum step-up height of the golf practice device
according to the second embodiment is not limited by the minimum
height of the actuators. For example, a golf practice device
according to the second embodiment may be manufactured to have a
step-up height of approximately seven inches while maintaining a
practice platform capable taking on a 5.degree. slope about two
different horizontal and substantially orthogonal axes of rotation.
Therefore, the second embodiment of the golf practice device of the
present invention may be manufactured to have a step-up height that
is significantly smaller than that of the first embodiment,
resulting in a golf practice device that is relatively easier and
more comfortable to use.
[0053] The practice platform 14 of the golf practice device of the
present invention (illustrated alone in FIG. 11) is sized to allow
a golfer to comfortably address a golf ball and repetitively
practice shots in various platform orientations simulating uphill,
downhill, or sidehill grades, or any combination thereof. The
practice platform 14 comprises a continuous structure and is
defined by a top surface and a bottom surface (not visible in FIG.
11) as well as an outside perimeter. The practice platform 14 may
be fabricated in a variety of shapes, but a generally rectangular
shape is preferred. Additionally, the practice platform 14 is
preferably constructed of a material that is corrosion resistant,
insensitive to daily or seasonal temperature fluctuations,
resistant to UV degradation, and of sufficient durability and
strength to support a golfer and withstand regular use. For
example, the practice platform 14 may be fabricated from coated
steel or a corrosion resistant alloy, such as stainless steel, a
titanium alloy, or an aluminum alloy. Alternatively, the practice
platform 14 may be constructed of a composite material, a resin, or
a polymer, such as, for example, ABS or HDPE. It is presently
preferred to construct the practice platform 14 using
thermo-formed, impact modified, and UV stabilized HDPE, as this
material results in a durable, non-corrosive, lightweight, and
relatively inexpensive practice platform 14 that is resistant to UV
degradation and is easily formed into a continuous structure of the
appropriate shape.
[0054] The practice platform 14 of the golf practice device of the
present invention may include several features. Among these
features are drainage holes 126, a standing area 128 to be used by
a golfer while practicing, and a tray 132 wherein different inserts
134 simulating varying grass lengths or sand trap conditions can be
disposed. Further, the practice platform 14 preferably includes at
least one depression 140 allowing easy storage of and access to a
plurality of golf balls during a practice session. Thermo-formed,
impact modified, and UV stabilized HDPE is easily formed through
rotational or injection molding processes to produce a practice
platform 14 including each of these features.
[0055] The drainage holes 126 pass through the practice platform
and allow water to easily drain off of the practice platform to the
upper surface of the platform support. Because the upper surface of
the platform support of each embodiment of the present invention is
substantially continuous and planar, the draining water easily
passes to one of the edges of the platform support where it is shed
from the golf practice device.
[0056] The standing area 128 to be used by a golfer includes a
series of raised ribs 130. Though any desirable dimensions may be
used, the raised ribs 130 are preferably spaced on 2" centers and
are approximately 1" wide by 1/2" tall. The raised ribs 130 provide
open avenues for water travel and thereby help to prevent the
standing area 128 from becoming waterlogged after the golf practice
device of the present invention is exposed to precipitation.
Moreover, the convoluted surface provided by the raised ribs 130
results in a stronger practice platform 14 better able to withstand
the compressive and angular forces exerted by a practicing
golfer.
[0057] A mat 142 (shown in place in FIG. 1, FIG. 6, and FIG. 10),
which may be fabricated of synthetic grass and/or rubber, is
removably placed over the series of raised ribs 130 and covers the
standing area 128 to be used by a golfer while practicing. The mat
142 is preferably perforated or otherwise fabricated to allow the
passage of water. Though various known materials may be used to
fabricate the mat 142, a commercial grade ASTROTURF.TM. surface
with a rubberized backing is presently preferred. The mat 142
should be forgiving yet sufficiently rigid that when it is
positioned over the series of raised ribs 130, a valley 144 is
formed between each raised rib 130, even when a golfer is standing
on the mat 142 (illustrated in FIG. 12). These valleys 144 are not
so apparent to a golfer as to be intrusive or upsetting, yet they
allow water to pass through the mat 142, into the valleys 144, and
out of the standing area 128 used by a golfer while practicing.
[0058] Removable placement of the mat 142 over the series of raised
ribs 130 may be achieved by means known in the art. For example,
the practice platform 14 may include attachment areas 146 for the
mat (illustrated in FIG. 11) whereon two sided adhesive tape is
adhesively attached. Alternatively, one side of a two sided hook
and loop adhesive system, such as VELCRO.TM., may be attached by
known means such as adhesive, screws, or rivets, to the attachment
areas 146 included on the practice platform 14, and the second side
of the two sided hook and loop system may be attached to the mat
142 by similar means. Removable attachment of the mat 142 is
advantageous in that it allows removal of the mat 142 for cleaning
or replacement.
[0059] The tray 132 included on the practice platform 14 is
structurally continuous with the remainder of the practice platform
14 and facilitates the removable placement of a variety of inserts
134 simulating various lengths of grass or sand trap conditions.
The tray 132 includes a recess defined by a bottom surface 150 and
sidewalls 152a-152d, and may include a depression (not illustrated
in FIG. 11) in one of the sidewalls 152a-152d which allows easy
removal of an insert 134 disposed within the tray 132. The various
inserts 134 may be removably disposed within the tray 132 using any
suitable means known in the art. For example, snap-fit connectors,
VELCRO.TM., or other, larger hook and loop systems, may be used to
removably place the inserts 134 within the tray 132. However, it is
presently preferred to removably place the inserts 134 within the
tray 132 using a friction-fit. The inserts 134, therefore, are
preferably sized such that, when an insert 134 is placed within the
tray 132, the outer perimeter of the insert 134 abuts the sidewalls
150a-150d of the tray 132, thereby creating a pressure between the
insert 134 and the sidewalls 150a-150d which maintains the insert
134 in place during use.
[0060] As was mentioned, a variety of inserts 134 simulating
varying grass lengths can be utilized in conjunction with the golf
practice device of the present invention. Commercially available
synthetic grass panels simulating several different grass
conditions, such as, for example, tee box, fairway, or rough
conditions, may be used to fabricate various inserts 134 by means
known in the art. For example as is shown in FIG. 1 and FIG. 13 an
insert 134 may produced by affixing a synthetic grass panel 160 of
a given length to a backing 162 by any suitable means, such as, for
example, bonding, gluing, screwing or riveting. Alternatively, as
is illustrated in FIG. 6 and FIG. 14, synthetic grass panels 160a,
160b of differing lengths may affixed to a single backing 162 to
produce an insert 134 simulating more than one grass length. The
backing 162 of the inserts 134 is preferably fabricated of material
that is impact resistant, substantially non-corrosive, UV
resistant, and able to withstand normal daily and seasonal
temperature extremes, such as, for example, thermo-formed, impact
modified, and UV stabilized ABS or HDPE.
[0061] The synthetic grass panels 160 used to create an insert 134
may allow the face of a golf club (particularly a golf iron) to
travel underneath a golf ball resting on the insert 134 as a golf
swing is executed and the golf ball is struck. For example, the
synthetic hitting surfaces manufactured by FIBERBUILT.RTM.
Manufacturing, Inc. of Shelby, Mont., USA, allow the face of a club
to travel underneath a golf ball as the golf ball is struck and are
well suited for fabricating inserts 134 simulating various grass
lengths. Synthetic grass panels 160 that allow a club face to
travel underneath a golf ball as the golf ball is struck not only
more accurately simulate golf shots taken on natural turf, but also
substantially reduce or eliminate the hand shock, arm injury, and
club damage often associated with synthetic grass mats.
[0062] Additionally, permanent or removable golf tees may be
provided in the inserts 134. For example, an insert 134 having a
permanently attached golf tee may be fabricated by providing a
synthetic grass panel 160 having a small hole, passing a golf tee
having a tee shaft and tee anchor through the small hole in the
grass panel 160, such that the tee shaft extends out from a top
surface of the grass panel and the tee anchor prevents the tee from
passing through the grass panel. The tee is then permanently
incorporated into the insert 134 by affixing the grass panel 160 to
a backing 162 as has already been discussed. An insert 134 having a
removable tee may simply include a small hole passing through its
entirety (i.e., through the synthetic grass panel 160 and the
backing 162). When tee shots are desired, a tee including a tee
shaft and tee anchor may be passed through the small hole, and the
insert 134 positioned within the tray 132 of the practice platform,
the tee anchor maintaining the tee in place during use. When tee
shots are no longer desired the insert 134 may be removed from the
tray 132, the tee removed, and the insert 134 replaced.
[0063] An insert 134 designed to simulate sand trap conditions may
also be fabricated using materials and means known in the art. As
illustrated in FIG. 15, such an insert 134 includes four
surrounding sides 180a-180d and a bottom surface 182. The sand trap
insert 134, therefore, is itself substantially shaped like the tray
132 of the practice platform 14, but its dimensions allow the sand
trap insert 134 to fit within the tray 132. The sand trap insert
134 may be fabricated of any suitable material known in the art,
such as, for example, thermo-formed, impact modified, and UV
stabilized ABS of HDPE. When a sand trap insert 134 is positioned
within the tray 132, the four surrounding sides 180a-180d of the
sand trap insert 134 are preferably in contact with the sidewalls
of the tray. Contact between the sidewalls of the tray and the
surrounding sides 180a-180d of the sand trap insert 134 not only
facilitates removable placement by a friction-fit, but also serves
to inhibit the migration of large amounts of sand from the sand
trap insert 134 to the bottom surface of the tray 132.
[0064] The practice platform 14 of the golf practice device 10 of
the present invention may be designed for use by right handed
golfers, left handed golfers, or right and left handed golfers. A
practice platform 14 designed to allow the golf practice device 10
of the present invention to be used by both right and left handed
golfers is illustrated in FIG. 1. The practice platform 14 includes
an approach side 190, a target side 192, and first and second sides
194, 196 having first and second upwardly extending ridges 198, 200
at their edges (the first side 194 and first upwardly extending
ridge 198 being behind the golfer as the golfer addresses the ball
on the practice platform 14). The approach 190 side will generally
be used by the golfer to step up onto the practice platform 14 and
is farthest from the intended target or intended direction of
travel of the golf ball. The target side 192 is opposite the
approach side 190 and is closest to the intended target or intended
direction of travel of the golf ball. Neither the approach side 190
nor the target side 192 of a practice platform intended for use by
right-handed and left-handed golfers includes an upwardly extending
ridge. The two sides 194, 196 having upwardly extending ridges 198,
200 are in front of and behind a golfer as the golfer addresses a
golf ball in preparation for a practice shot. The upwardly
extending ridges 198, 200 at these two sides 194, 196 provide
visual and physical references for a golfer and may serve to
prevent a golfer from accidentally stepping off or slipping off the
practice platform 14. Moreover, one or both of the upwardly
extending ridges 198, 200 may include a depression 140 which allows
storage of and access to a plurality of golf balls during a
practice session.
[0065] As is easily appreciated, a golf practice device 10
including a practice platform 14 having no upwardly extending
ridges on either the approach side 190 or target side 192 is easily
converted from right handed to left handed use and vice-versa. To
accomplish this conversion, the golf practice device 10 need only
be rotated 180.degree.. If the golf practice device 10 is
positioned for right-handed use, the positions of the tray 132 and
the standing area 128 to be used by a golfer while practicing are
the mirror opposite of what they should be for a left-handed
golfer. However, by simply rotating the golf practice device 10
through 180.degree. relative to the target area or intended
direction of travel of the golf ball, the positions of the tray 132
and the standing area 128 to be used by a golfer while practicing
are reversed. Therefore, where the practice platform 14 is designed
to enable use by right-handed and left-handed golfers, the approach
side 190 of the practice platform 14 for a right-handed golfer
simply becomes the target side 192 of the practice platform 14 for
a left-handed golfer and vice-versa.
[0066] The practice platform 14 may also be fabricated for
dedicated use by right-handed golfers or by left-handed golfers.
For example, FIG. 6 shows a golf practice device 10 having a
practice platform 14 fabricated and mounted for dedicated use by
right-handed golfers, and FIG. 10 shows a golf practice device 10
having a practice platform 14 fabricated and mounted for dedicated
use by left-handed golfers.
[0067] Where the practice platform 14 is fabricated for use only by
right-handed golfers or only by left-handed golfers, the practice
platform 14 includes a third upwardly extending ridge 201 along the
edge of the intended target side 194 of the practice platform 14.
This third upwardly extending ridge 201 intersects the first
upwardly extending ridge 198 at the edge of the first side 194
behind a golfer as the golfer addresses the ball in preparation for
a practice shot. However, in order to provide free space for the
head of the swinging club and the exiting ball, the third upwardly
extending ridge 201 on the target side 194 does not extend the
entire length of the target side 194. The third upwardly extending
edge 201 may provide an added sense of security to a user of the
golf practice device of the present invention, but it creates a
practice platform 14 with a dedicated target side 194 that cannot
be properly used by right and left handed golfers. As is easily
appreciated by reference to FIG. 6 and FIG. 10, whether or not a
golf practice device 10 is dedicated to right-handed or left-handed
use depends entirely upon how the practice platform 14 having a
third upwardly extending ridge 201 is mounted to the adjustable
support assembly 12.
[0068] It should be understood, however, that the practice platform
of the golf practice device of the present invention may be
fabricated using one, two, or three upwardly extending ridges at
the edges of the practice platform. It is simply presently
preferred to include only two upwardly extending ridges positioned
in front of and behind a golfer as the golfer addresses a golf ball
on the practice platform because doing so results in a golf
practice device that is easily used by right and left handed
golfers.
[0069] As already mentioned, each embodiment of the golf practice
device 10 of the present invention also includes an electronic
control unit (hereinafter an "ECU") 16. The ECU 16 is preferably
housed in a body 330 that may be mounted to or formed as part of a
support 210 which extends up from the adjustable support assembly
12 and is preferably hollow. Moreover, the support 210 preferably
extends out of the flange 42 of the platform support 20 of a golf
practice device 10 according to the first embodiment (so that the
substantially continuous nature of the upper surface of the
platform support 20 is maintained), while the support 210
preferably extends out of the top surface 107 of an overhang 104,
105 included in the base 18 of a golf practice device 10 according
to the second embodiment of the present invention. Because the ECU
16 controls adjustment of the practice platform 14, the ECU 16 as
well as its support 210 should be positioned to facilitate user
access. Preferably, the ECU 16 is located on the golf practice
device so that it is positioned in front of or behind a golfer as
the golfer addresses a golf ball on the practice platform.
[0070] A schematic illustration of a golf practice device of the
present invention including an exemplary ECU 16 is provided in FIG.
17. As shown in FIG. 16, the ECU 16 of the golf practice device 10
of the present invention includes a user interface 300, a processor
302, and, preferably, machine readable memory 304, such as, for
example, random access memory (RAM), read only memory (ROM),
programable read only memory (PROM), or electrically erasable
programable read only memory (EEPROM). The ECU 16 may also include
an outboard (to the processor 302) clock 305, such as, for example,
an 8 MHZ crystal oscillator module, supplying clock signals to the
processor 302. Further, the ECU may include a communication port
306 enabling communication between the ECU 16 and an external
computer 308. Based on inputs provided from, for example, the user
interface 300, the actuators 24, or an external computer 308, the
processor 302 controls the actuators 24 such that the practice
platform of the golf practice device of the present invention is
adjusted as desired by the user to simulate various golf course
conditions. Though the ECU 16 of the golf practice device of the
present invention 10 is described herein as incorporating each of
its various features within a single body 330, the features of ECU
16 of the present invention need not be contained within a single
body 330 and may be located about the golf practice device 10 of
the present invention as desired.
[0071] Any suitable processor 302 may be used in the ECU 16 of the
golf practice device 10 of the present invention. For instance the
processor 302 may be any known microprocessor or digital signal
processor capable of receiving data, processing data, and
communicating output or control signals based on the data received.
Presently, it is preferred to provide the ECU 16 with a PIC
16C64/08 microcontroller manufactured by Microchip Technology Inc.
of Chandler, Ariz., USA. However, the ECU 16 of the golf practice
device 10 of the present invention is not limited to incorporation
of such a processor 302.
[0072] The user interface 300 of the ECU 16 of the present
invention includes any known interface that is not only capable of
displaying to a user information output from the processor 302, but
is also capable of communicating signals representing user inputs
to the processor 302. For example, it is presently preferred to
provide a user interface comprising a weather resistant membrane
keypad 310 incorporating a plurality of input switches 312-324b and
a plurality of LCD displays 326a-326c (illustrated in FIG. 16).
Where such a user interface 300 is provided, a user activates and
controls the golf practice device of the present invention by
actuating one or more of the plurality of input switches 312-324b,
and the microprocessor 302 directs the display of appropriate
information in each of the plurality of LCD displays. A
membrane-type control panel is preferred because the entire surface
of the control panel is continuous and, therefore, provides
enhanced protection from moisture, dust, dirt, and debris. However,
as is easily appreciated, the user interface 300 may include any
known input device in combination with any known display device,
provided that such input and display devices are capable of
reliable operation under the anticipated operational stresses.
[0073] As is shown in FIG. 16, the input switches 312-324b of the
user interface 300 may control any desired function. The user
interface may include an "ON/OFF" switch 312 for activating and
deactivating the golf practice device. The user interface 300 also
preferably includes a "CALIBRATE LEVEL" switch 314 and a "GO TO
LEVEL" switch 316. The CALIBRATE LEVEL switch 314 enables automatic
or manual calibration of the level or "zero" position of the
practice platform even when the golf practice device is positioned
on a non-level surface, and actuation of the GO TO LEVEL switch 316
signals the processor 302 to control the automatic return of the
practice platform to the calibrated zero position. Moreover, the
user interface 300 may include various input switches for manual or
automatic adjustment of the practice platform. The "SELECT PRESET"
switches 316a, 316b allow a user to scroll through a group of
"presets", each preset representing a pre-programmed practice
platform position or a pre-programmed practice routine including a
variety of practice platform settings. Significantly, where the
machine readable memory 304 of the ECU 16 includes pre-programmed
practice routines, such routines may simulate the terrain of
various well-known golf courses, allowing a user to simulate a
round of golf on a course of choice. Actuation of the "GO PRESET"
switch 318 signals the processor 302 to adjust the practice
platform in accordance with the preset selected by the user. To
facilitate manual adjustment of the practice platform, the user
interface 302 may be provided with "MANUAL UP/DOWNHILL" switches
320a, 320b and "MANUAL SIDEHILL" switches 322a, 322b. Actuation of
such switches directs the processor to control the uphill,
downhill, or sidehill adjustment of the practice platform until a
desired position is achieved. It must be noted however, that the
user interface 300 illustrated in FIG. 16 is merely exemplary. The
user interface 300 of the ECU 16 of the golf practice device of the
present invention may incorporate any number of input switches
controlling any desired function of the golf practice device of the
present invention.
[0074] The LCD displays 326a-326c provided in the user interface
illustrated in FIG. 15 serve to present useful information as the
golf practice device of the present invention is used. The
information presented in each LCD display 326a-326c is preferably
controlled by the processor 302 and dependent upon inputs received
by the processor. For instance, as a user actuates one of the
"SELECT PRESET" switches 316a, 316b, the microprocessor controls
the display of an indicator 317 within the first LCD display 326a.
The indicator 317 may be any desirable text and/or graphical
message indicating the preset currently selected. The processor 302
of the ECU 16 also receives condition data from each of the
actuators 24, and based on such condition data, the processor 32
controls the display of second and third indicators 319, 321 within
the second and third LCD displays 326b, 326c. The second and third
indicators 319, 321 indicate the uphill, downhill, and sidehill
grades taken on by the practice platform and may include any
appropriate text and/or graphical message. Further, as a user
actuates any one of the MANUAL UP/DOWNHILL 320a, 320b or MANUAL
SIDEHILL 322a, 322b switches, the processor not only controls the
adjustment of the practice platform according to the user's desire,
but also continuously updates the second and third indicators 319,
321 according to the condition information received from the
actuators 24. Again, however, the user interface 300 of the ECU 16
of the present invention may include more or less than three
displays, and processor may be programmed to control such displays
to provide any information deemed beneficial to a user.
[0075] The processor 302 of the ECU 16 of the golf practice device
10 of the present invention may be configured as desired to
facilitate operation of the golf practice device 10 as described.
However, a preferred configuration for a golf practice device 10
including two actuators is presently described in order to more
completely illustrate the interaction between the user interface
300, the processor 302, and the actuators 24 included therein.
[0076] Where the present invention includes two actuators and a
user interface as illustrated in FIG. 16, it is preferred that
input switches, except the ON/OFF switch 312, be connected directly
to an input/output pin of the processor, each of such input/output
pins being configured as an input. Signals generated by actuation
of the input switches 314-324b are preferably processed internally
by the processor to produce appropriate output signals. It is
further preferred to designate two input/output pins of the
processor for each axis of directional control and actuator
control, such input/output pins being configured as outputs. Output
signals generated by the processor and communicated via these
directional pins drive field-effect transistors (FETs), which, in
turn, drive the coils of cross-connected relays. When the
directional pins are high, the coils of the cross-connected relays
are energized and movement in the positive direction of each axis
is facilitated. Two additional input/output pins are also
preferably configured as outputs and designated for actuator
control. When these two additional pins are high, optocouplers are
energized and drive gates of high power metal-oxide-semiconductor
field-effect transistors (MOSFETs). For example, IRFP044N
transistors manufactured by International Rectifier Corp. of El
Segundo, Calif., USA, may be used. When energized, such MOSFETs
provide a very low resistance return for the windings of the motors
driving the actuators. It is further preferred that eight
input/output pins be employed for transferring data to LCD display
drivers included in the ECU. Finally, two input/output pins are
preferably configured as inputs designated to receive signals
generated by encoders included in the actuators. As the actuators
are extending or contracting, signals sent by the encoders to the
two dedicated pins indicate the exact extension of each actuator.
The signals generated by the encoders are processed by the
processor to produce output signals to the LCD drivers
corresponding to the uphill, downhill, or sidehill position of the
practice platform.
[0077] Though not necessary, a communication port 306 enabling
communication between the ECU 16 and an external computer 308
expands the potential capabilities of the golf practice device 10
of the present invention. In particular, an external computer may
include one or more updated or additional pre-programmed practice
routines not included within the machine readable memory 304
included of the ECU 16. Interaction between the external computer
308 and the ECU 16 via the communication port 308 could, therefore,
facilitate execution of such additional practice programs by the
golf practice device 10, thereby expanding its stand-alone
capabilities.
[0078] As mentioned, the support 210 for the ECU 16 is preferably
hollow. Moreover, the support 210 is preferably removably mounted
to the adjustable support assembly 12 of the golf practice device
10 of the present invention, with the ECU 16 preferably being
positioned near the top end 209 of the support 210. Removable
attachment of the support 210 may be achieved using any suitable
means known in the art, such as, for example, bolts or screws.
Removable attachment of the support 210 is preferred because easy
detachment and reattachment of the support 210 enhances the
portability of the golf practice device 10 of the present
invention.
[0079] The support 210 may be fabricated of any material that is
durable, substantially non-corrosive, and UV resistant. For
example, the support 210 may be fabricated of a polymer, such as
thermo-formed, impact modified, and UV stabilized ABS or HDPE, or
the support 210 may be fabricated of lightweight steel provided
with a suitable corrosion resistant coating.
[0080] Where a hollow support 210 is provided, any electrical or
communication lines necessary to power the ECU 16 or to facilitate
communication between the ECU 16 and other internal or external
components may be disposed within the support 210. In order to ease
attachment and detachment of the support 210 and, when applicable,
the ECU 16, each electrical or communication line disposed within
the support 210 may be provided with a suitable connector near the
top end 209 or the bottom end 211 of the support 210. Where such
connectors are included, any one of a variety of commercially
available wiring connectors may be used.
[0081] As shown in FIG. 1, FIG. 5, and FIG. 9, the electronic
control unit 16 may be housed in a body 330 including a front
surface, back surface, top surface, bottom surface (not visible),
and two side surfaces. The body 330 is substantially weather
resistant and may be fabricated using known materials which are
durable, substantially non-corrosive, and resistant to UV
degradation. For example, the body 330 may be fabricated using
aluminum alloy, stainless steel, coated steel, or thermo-formed,
impact modified, and UV stabilized ABS or HDPE.
[0082] The body 330 of the ECU 16 may be removably fastened to the
support 210 using any means known in the art, such as, for example,
bolts or screws. Where the body 330 is removably fastened to the
support 210, the body 330 is preferably fastened to the support 210
at the back or bottom surface of the body 330. Moreover, where
electrical or communication lines are disposed within the support
210 such lines preferably pass out of the body 330 and into the
support 210 through whichever side of the body 330 is removably
fastened to the support 210.
[0083] Alternatively, instead of mounting the body 330 of the ECU
16 to the support 210, the body 330 of the ECU 16 and the support
210 may be integrally formed of a single piece of a molded
material, such as, for example, thermo-formed, impact modified, and
UV stabilized ABS or HDPE. Such a design is desirable, as it
simplifies construction of support 210 and body 330 of the ECU 16,
while eliminating the need to fasten the body 330 of the ECU 16 to
the support 210.
[0084] As is schematically represented in FIG. 16, pressure sensors
340 may be disposed within or under the standing area 128 of the
practice platform 14 of the golf practice device 10 of the present
invention. Such pressure sensors are of great value for determining
the shift in weight which occurs between a golfer's feet during the
golfer's swing. The pressure sensors 340 output signals
representing the weight born by each of a golfer's foot when
addressing the golf ball as well as the shift in weight occurring
during a swing. The output signals are received by the processor
302, which, in turn, processes the signals and produces outputs
controlling the display of appropriate textual and/or graphical
information at the user interface 300. Thus, by including pressure
sensors 340 within or under the standing area 128 of the practice
platform 14 of the golf practice device 10 of the present
invention, a golfer can understand the shift in body weight which
occurs during strokes taken at different grades representing
various golf course conditions. Using such information, the golfer
can make any adjustments necessary to arrive at a more ideal weight
transfer for strokes taken under various combinations of course
conditions.
[0085] As can also be appreciated by reference to FIG. 16, the golf
practice device of the present invention may also include a
measurement module 342. The measurement module 342 includes one or
more sensors configured to sense the speed, rotation, and/or
direction of a golf ball after it is struck on the practice
platform of the golf practice device of the present invention. The
measurement module 342 may also include a sensor configured to
sense club speed or angle as a golf swing is executed. The one or
more sensors included in the measurement module 342 may be digital
or analog, and suitable digital and analog sensors capable of
sensing ball speed, rotation, and direction, as well as club speed
and angle, are known in the art. For example, American IR, Inc. of
Las Vegas, Nev., USA, manufactures single beam, dual beam, and
multi-array emitters which are suitable for application in the
measurement module 342. Based on sensed inputs from the one or more
sensors, the measurement module 342 preferably generates output
signals representing an interpolated location of the struck golf
ball in terms of distance and deviation from center. Such output
signal are received by the processor 302, which, in turn, processes
the output signals and controls the display of appropriate textual
and/or graphical information at the user interface 300 indicating
the interpolated position of the struck golf ball. Communicating
the interpolated position of a struck golf ball to a user is highly
desirable, as it allows the user to readily appreciate the effects
of various adjustments to the user's golf swing or stance.
[0086] Though any suitable power source may be used, the golf
practice device of the present invention is preferably powered from
120 volt AC power source. However, the initial current draw of the
actuators is very high (i.e., 30 amps or higher), and the 120 AC
power circuits generally provided in homes and commercial
establishments may not be able to support such a high current draw,
even for a very short period. Thus, it is presently preferred to
also provide the golf practice device of the present invention with
a battery (preferably, a twelve-volt sealed lead-acid battery). The
battery serves to buffer the initially high current draw of the
actuators, protecting the 120 volt AC power source from sudden,
unsupportable current loads. Moreover, where a battery is included
in the golf practice device of the present invention, it is
preferably continuously charged by a power supply when the golf
practice device of the present invention is activated. Though the
battery is used to supply electrical current required to operate
the actuators included in the present invention, a low current
supply is all that is necessary to maintain the battery at nearly
full charge because the actuators are operated under a low duty
cycle. However, in order to ensure that the battery remains
adequately charged and operational, it is preferred that golf
practice device of the present invention remain inoperable unless
the power supply charging the battery receives AC power and is thus
capable of charging the battery. For example, a sense line may
indicate operation of the power supply, deactivating the golf
practice device of the present invention in the absence of AC power
to the power supply. Nevertheless, where necessary, the battery may
provide power to operate the processor included in the ECU, even
when the power supply is not receiving AC power, in order to
preserve information stored in volatile machine readable
memory.
[0087] The electrical and communication lines of the golf practice
device of the present invention may include any suitable,
commercially available wiring, though heavy duty wiring is
preferred. All of the electrical and communication lines necessary
to the function of the golf practice device of the present
invention may be incorporated into a suitable wiring harness
routing the various electrical and communication lines to their
proper destinations in such a way as to avoid the risk of damage
due to interaction with moving parts and to ease transport, set up,
and service of the golf practice device of the present invention.
Moreover, surge and over current protection is preferably
incorporated into the wiring design of the golf practice device of
the present invention. Surge protection will serve to minimize
potential damage due to battery failure or "hot-swapping" of the
battery. Over current protection, which may be provided, for
example, by circuit breakers corresponding to each actuator
included in the adjustable support assembly, works to prevent
excessive power dissipation within the actuator motor, as well as
within the driving FETs, in the unlikely event that an actuator is
driven to its mechanical limit.
[0088] Further, it is presently preferred that the base 18 included
in the adjustable support assembly 12 of each embodiment of the
golf practice device of the present invention includes one or more
wheel assemblies. Each such wheel assembly includes at least one
wheel or castor and at least one rigid arm, with each wheel or
castor being affixed to each rigid arm using suitable means known
in the art. For example, if the wheel assembly includes a rigid arm
having a box-beam construction, a wheel or castor may be fitted
with an attachment that may be inserted within a first end of the
rigid arm. The wheel or castor may then be affixed by passing, for
example, a pin or bolt, through the rigid arm as well as the
attachment fitted to the castor or wheel. Alternatively, each wheel
assembly may include two spaced rigid arms that are approximately
31/2".times.11/4" and made of 1/8" thick stainless steel. Each
spaced rigid arm of such an embodiment includes a hole through
which a wheel axle, pin, or bolt may be disposed. A wheel may then
be placed between the two spaced rigid arms and attached by
disposing a wheel axle, pin, or bolt through the first rigid arm,
the wheel, and the second rigid arm. The rigid arms of the wheel
assemblies discussed herein may be secured to the base 18 of an
adjustable support assembly 12 using any means known in the art,
such as, for example, welding, bonding, riveting, bolting, or
screwing, that creates a rugged, permanent or removable
attachment.
[0089] The base 18 of an adjustable support assembly 12 of a golf
practice device 10 of the present invention preferably includes at
least one wheel assembly in order to facilitate at least short
distance movement of the golf practice device 10 by a single
person. Thus, each component of the wheel assemblies should be
fabricated of using materials and means resulting in wheel
assemblies of sufficient strength to reliably support the entire
weight of the golf practice device 10 of the present invention.
Further, materials that are lightweight, and substantially
noncorrosive.
[0090] Each aspect of the golf practice device of the present
invention is chosen to result in a device that is comfortable and
easy to use as well as moveable by one person and portable by two
people. For example, the adjustable support assembly and the
practice platform are designed to result in a practice platform
that is adjustable multi-dimensionally yet comfortable to approach,
access and use. The adjustable support assembly and practice
platform are, therefore, designed to minimize the step-up height
between the ground and the top surface of the practice platform.
Moreover, the size and weight of the golf practice device of the
present invention should allow the device to be moved by one person
using the one or more wheel assemblies provided on the base of the
adjustable support assembly, and the entire device is lightweight
and small enough to be lifted by two people and transported in a
pick-up truck, sport utility vehicle, or small trailer.
[0091] The golf practice device of the present invention is,
therefore, ideally suited for commercial as well as private
applications. As has been emphasized, the golf practice device of
the present invention is programmable and enables a golfer to
repetitively practice shots under conditions that realistically
simulate various combinations of uphill, downhill, or sidehill
lies, as well as various grass lengths and sand trap conditions.
However, the golf practice device is also relatively inexpensive,
comfortable to use, lightweight, easily moved by one person,
completely portable by two persons, and can be left out of doors
uncovered for extended periods of time.
[0092] Though the golf practice device of the present invention is
described herein using various embodiments and figures, the scope
of the present invention is not limited to such embodiments and
figures but is defined by the appended claims.
* * * * *