U.S. patent application number 15/235038 was filed with the patent office on 2017-02-09 for adjustable golf club.
The applicant listed for this patent is Brainstorm Golf, Inc.. Invention is credited to David Stuart Cooper, Vikash Sanyal, Jeffrey Sheets.
Application Number | 20170036073 15/235038 |
Document ID | / |
Family ID | 51538493 |
Filed Date | 2017-02-09 |
United States Patent
Application |
20170036073 |
Kind Code |
A1 |
Sanyal; Vikash ; et
al. |
February 9, 2017 |
ADJUSTABLE GOLF CLUB
Abstract
Apparatus and methods are described herein to provide a golf
club, such as, for example, a putter, with a select loft angle
and/or a select lie angle. In some embodiments, an apparatus
includes a golf club having a golf club head, a hosel, and a hosel
shim. The golf club head has a hosel shank and the hosel is
configured to be coupled to the hosel shank. The hosel shim is
configured to be coupled to the hosel to position the hosel at a
select angle relative to the golf club head such that the golf club
has a select lie angle. The hosel shim is further configured to
limit rotational movement of the hosel relative to the golf club
head such that the select lie angle is maintained when the hosel is
coupled to the golf club head.
Inventors: |
Sanyal; Vikash; (Valley
Center, CA) ; Cooper; David Stuart; (Encinitas,
CA) ; Sheets; Jeffrey; (San Diego, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Brainstorm Golf, Inc. |
Escondido |
CA |
US |
|
|
Family ID: |
51538493 |
Appl. No.: |
15/235038 |
Filed: |
August 11, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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14216979 |
Mar 17, 2014 |
9446291 |
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15235038 |
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61910904 |
Dec 2, 2013 |
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61799513 |
Mar 15, 2013 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A63B 2053/0491 20130101;
A63B 53/021 20200801; A63B 60/00 20151001; A63B 53/06 20130101;
A63B 53/023 20200801; A63B 53/02 20130101; A63B 53/0487 20130101;
A63B 53/025 20200801 |
International
Class: |
A63B 53/02 20060101
A63B053/02; A63B 53/06 20060101 A63B053/06; A63B 53/04 20060101
A63B053/04 |
Claims
1. An apparatus, comprising: a golf club including a golf club
head, a hosel, and a hosel shim, the golf club head having a hosel
shank, the hosel configured to be coupled to the hosel shank, the
hosel shim configured to be coupled to the hosel to position the
hosel at a select angle relative to the golf club head such that
the golf club has a select lie angle, the hosel shim configured to
limit rotational movement of the hosel relative to the golf club
head such that the select lie angle is maintained when the hosel is
coupled to the golf club head; wherein the hosel defines a
plurality of grooves, the hosel shim includes a protrusion
configured to be received within a select groove from the plurality
of grooves such that the golf club has the select lie angle.
2. The apparatus of claim 1, wherein the golf club further includes
a face member removably coupled to the golf club head; and a loft
angle shim removably disposable between the golf club head and the
face member, the loft angle shim configured to provide the face
member with a select loft angle relative to the golf club head when
the loft angle shim is disposed between golf club head and the face
member.
3. The apparatus of claim 1, further comprising: a first bushing
and a second bushing each couplable to the hosel shank, the first
bushing, the second bushing and the hosel collectively configured
to adjust a shaft offset of the golf club based on a position of
the first bushing and a position of the second bushing relative to
the hosel when coupled to the hosel shank.
4. A kit, comprising: a golf club including a golf club head and a
hosel, the golf club head having a hosel shank, the hosel
configured to be coupled to the hosel shank; and a plurality of
selectable hosel shims, each hosel shim from the plurality of
selectable hosel shims configured to be selectively coupled to the
hosel to position the hosel at a select angle relative to the golf
club head such that the golf club has a select lie angle, the
select hosel shim configured to limit rotational movement of the
hosel relative to the golf club head such that the select lie angle
is maintained when the hosel is coupled to the golf club head.
5. The kit of claim 4, wherein each hosel shim from the plurality
of selectable hosel shims has an inner perimeter configured to be
matingly coupled to an outer perimeter portion of a mounting
portion of the hosel.
6. The kit of claim 14, wherein each hosel shim from the plurality
of selectable hosel shims has an inner perimeter configured to be
matingly coupled to a top outer perimeter portion of a mounting
portion of the hosel.
7. The kit of claim 4, wherein each hosel shim from the plurality
of selectable hosel shims can be coupled to the hosel in a first
orientation for a right handed user and a second orientation
different than the first orientation for a left handed user.
8. The kit of claim 4, wherein each hosel shim from the plurality
of selectable hosel shims has an inner perimeter with an angled
surface portion, the angled surface portion configured to provide
the golf club with the select lie angle when the hosel shim is
coupled to the hosel.
9. The kit of calm 4, wherein each hosel shim from the plurality of
selectable hosel shims has an inner perimeter configured to be
matingly coupled to a bottom outer perimeter portion of a mounting
portion of the hosel.
10. An apparatus, comprising: a golf club including a golf club
head, a hosel, and a hosel shim, the golf club head having a hosel
shank, the hosel configured to be coupled to the hosel shank; the
hosel shim configured to be coupled to the hosel in a first
position for a right handed user and a second position different
than the first position for a left handed user, the hosel being
disposed at a first angle relative to the golf club head when the
hosel shim is coupled to the hosel in the first position such that
the golf club has a select lie angle, the hosel being disposed at a
second angle relative to the golf club head when the hosel shim is
coupled to the hosel in the second position such that the golf club
has the select lie angle; and a face member removably coupled to
the golf club head.
11. The apparatus of claim 10, wherein the golf club further
includes a loft angle shim removably disposable between the golf
club head and the face member, the loft angle shim configured to
provide the face member with a select loft angle relative to the
golf club head when the loft angle shim is disposed between golf
club head and the face member.
12. The apparatus of claim 10, further comprising: a first bushing
and a second bushing each couplable to the hosel shank, the first
bushing, the second bushing and the hosel collectively configured
to adjust a shaft offset of the golf club based on a position of
the first bushing and a position of the second bushing relative to
the hosel when coupled to the hosel shank.
13. An apparatus, comprising: a golf club including a golf club
head, a hosel, a hosel shim and an alignment rod, the hosel
configured to be coupled to the golf club head, the hosel shim
defining a plurality of alignment openings, the alignment rod
configured to be received in a select one of the alignment openings
from the plurality of alignment openings such that the hosel is
disposed at a select angle relative to the golf club head and the
golf club has a select lie angle, the alignment rod configured to
limit rotational movement of the hosel relative to the golf club
head such that the select lie angle is maintained when the hosel is
coupled to the golf club head.
14. The apparatus of claim 13, wherein the hosel shim is a first
hosel shim, the apparatus including a second hosel shim defining a
plurality of alignment openings, the alignment rod configured to be
received in a select alignment hole from the plurality of alignment
holes of the second hosel shim.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 14/216,979, entitled ADJUSTABLE GOLF CLUB,
filed Mar. 17, 2014, which claims priority to and the benefit of
U.S. Provisional Patent Application No. 61/910,904, entitled
"Adjustable Golf Club," filed Dec. 2, 2013, and U.S. Provisional
Patent Application No. 61/799,513, entitled "Golf Club Configured
for Multiple Adjustability," filed Mar. 15, 2013, the disclosures
of which are incorporated herein by reference in their
entirety.
[0002] This application is also related to pending U.S. patent
application Ser. No. 14/216,973 entitled "Golf Club Configured for
Multiple Adjustability" filed on Mar. 17, 2014, the disclosure of
which is incorporated herein by reference in its entirety.
BACKGROUND
[0003] Some embodiments described herein relate to a golf club,
such as a putter, with adjustable features.
[0004] Each individual golfer is different, being of differing
strength, differing size, and having different golf club strokes.
Modern golf clubs are fitted to match a golfer's strength, size and
type of stroke. Custom fitting of golf clubs, however, can be
extremely expensive.
[0005] Some golf clubs have been designed with some adaptability
(or adjustability). These adaptable golf clubs, however, can be
very complex to build and often require dozens if not hundreds of
different sized components. As a result, known adaptable (or
adjustable) golf clubs can also be extremely expensive.
[0006] Although typical known golf clubs are functional and can be
fitted to a specific golfer or adapted to be customizable for
different golfers, known golf clubs, are not sufficiently
adaptable, affordable or otherwise satisfactory. Accordingly, an
adjustable golf club, such as, for example, an adjustable putter is
needed to address the shortfalls of present technology and to
provide other new and innovative features and to establish
dexterity based on its configured position.
SUMMARY
[0007] Apparatus and methods are described herein to provide a golf
club, such as, for example, a putter, with a select loft angle
and/or a select lie angle. In some embodiments, an apparatus
includes a golf club having a golf club head, a hosel, and a hosel
shim. The golf club head has a hosel shank and the hosel is
configured to be coupled to the hosel shank. The hosel shim is
configured to be coupled to the hosel to position the hosel at a
select angle relative to the golf club head such that the golf club
has a select lie angle. The hosel shim is further configured to
limit rotational movement of the hosel relative to the golf club
head such that the select lie angle is maintained when the hosel is
coupled to the golf club head.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIGS. 1A and 1B are side views and FIG. 1C is a top view of
an adjustable putter, according to an embodiment.
[0009] FIG. 2A is a side view of a portion of the adjustable putter
of FIGS. 1A-1C; and FIG. 2B is an enlarged view of detail A in FIG.
2A.
[0010] FIG. 3 is a side view of a portion of an adjustable putter,
according to another embodiment.
[0011] FIGS. 4A and 4B are partially exploded perspective views of
a putter having an adjustable face, according to another
embodiment.
[0012] FIG. 5A is an exploded view of a portion of a putter having
an adjustable lie angle, according to an embodiment.
[0013] FIG. 5B is a perspective view of a hosel of the putter of
FIG. 5A.
[0014] FIG. 5C is a rear view of the putter of FIG. 5A.
[0015] FIGS. 5D and 5E are front and rear views, respectively, of a
hosel shim of the putter of FIG. 5A.
[0016] FIGS. 6A-6C are each a rear view of an adjustable hosel
shown in different lie angle configurations.
[0017] FIG. 7 is an illustration of a disassembled adjustable hosel
system, according to an embodiment.
[0018] FIG. 8 is a perspective view of a portion of a putter having
an adjustable hosel, according to an embodiment.
[0019] FIG. 9A is top view of a hosel and bushings for a putter
having an adjustable lie angle, according to an embodiment, and
FIG. 9B is a detail view of a portion of the hosel system of FIG.
9A.
[0020] FIG. 10 illustrates schematic front views of a hosel and
bushing for a putter having an adjustable lie angle, according to
an embodiment.
[0021] FIG. 11 illustrates schematic rear views of a hosel and
busing for a putter having an adjustable lie angle, according to
another embodiment.
[0022] FIG. 12 is a rear perspective view of a portion of a putter,
according to an embodiment.
[0023] FIG. 13 is an exploded side perspective view of the putter
of FIG. 12.
[0024] FIG. 14 is a perspective view of a hosel shim of the putter
of FIG. 12.
[0025] FIGS. 15A-15C each illustrate a portion of a hosel shim
according to a different embodiment, shown in an orientation for a
right handed user.
[0026] FIGS. 16A-16C each illustrate the portion of a hosel shim
according to the different embodiments of FIGS. 15A-15C, shown in
an orientation for a left handed user.
[0027] FIGS. 17A-17C each illustrate a bottom perspective view of
the hosel shims of FIGS. 15A-15C, respectively.
[0028] FIG. 18 is a rear view of a portion of a putter, according
to another embodiment.
[0029] FIG. 19 is an exploded side perspective view of the putter
of FIG. 18.
[0030] FIG. 20 is a partially exploded rear perspective view of the
putter of FIG. 18.
[0031] FIG. 21 is an exploded view of the hosel and hosel shim of
the putter of FIG. 18.
[0032] FIG. 22 is a rear view of the hosel shim of the portion of
the putter of FIG. 18.
[0033] FIG. 23 is an exploded view of a portion of the putter of
FIG. 18.
[0034] FIG. 24A illustrates the hosel and hosel shim of the putter
of FIG. 18 shown in an orientation for a right handed user; and
FIG. 24B illustrates the hosel and hosel shim of the putter of FIG.
18 shown in an orientation for a left handed user.
[0035] FIG. 25A-25C are each a schematic illustration of a portion
of a putter showing the adjustability of a shaft offset.
DETAILED DESCRIPTION
[0036] Apparatus and methods are described herein for adjustable
golf clubs, such as an adjustable putter, which can provide for
multiple ways to adjust the golf club to fit different golfers. The
adjustable golf clubs can be configured to be adjusted to provide
at least one of an adjustable lie angle of a hosel neck, an
adjustable offset distance of a shaft relative to a face of the
golf club, and a loft angle of the face.
[0037] The adjustable golf clubs described herein can be adjusted
using a single tool to adjust, for example, each of the following
specifications or parameters that can be custom fit for any golfer:
loft angle, lie angle, shaft length, hosel offset, dexterity and
weight. In some embodiments, at least three of these parameters can
be adjusted on a golf club (e.g., putter). In some embodiments, the
adjustable golf club is made at least in part of in soft feeling
aluminum. The adjustable golf club can also incorporate vibration
dampening polyurethane in hosel bushings and a face insert to
contribute to smooth performance. Although embodiments herein
describe the adjustability of a putter, it should be understood the
adjustable features described herein can be applied or incorporated
within other types of golf clubs.
[0038] In some embodiments, an apparatus includes a golf club head,
a face member removably coupled to the golf club head, and a shim.
The shim can be configured to be disposed in a first orientation
between the golf club head and the face member such that the face
member has a first loft angle relative to the golf club head. The
shim is configured to be disposed in a second orientation between
the golf club head and the face member such that the face member
has a second loft angle relative to the golf club head different
than the first loft angle. Additionally, multiple shims of varying
geometry can be used to provide a multitude of lofts.
[0039] In some embodiments, an apparatus includes a golf club head
having a hosel shank and a hosel configured to be coupled to the
golf club head. A hosel shim is configured to be coupled to the
hosel to be slidably coupled to the hosel shank of the golf club
head to position the hosel at a select lie angle relative to the
golf club head. The hosel shim is further configured to limit
rotational movement of the hosel relative to the golf club head
such that the select lie angle is maintained when the hosel is
coupled to the golf club head.
[0040] In some embodiments, an apparatus includes a golf club head
and a face member removably coupled to the golf club head. A loft
angle shim is removably disposable between the golf club head and
the face member. The loft angle shim is configured to provide the
face member with a select loft angle relative to the golf club head
when the loft angle shim is disposed between golf club head and the
face member. A hosel is removably coupled to the golf club head and
a lie angle shim is removably coupled to the hosel. The lie angle
shim is configured to provide the hosel with a select lie angle
relative to the golf club head when the lie angle shim is coupled
to the hosel and the hosel is coupled to the golf club head. In
addition the lie angle shim can be rotated 180 degrees and alter
the dexterity of the golf club's set up enabling its use to both
right and left handed golfers.
[0041] In some embodiments, an apparatus includes a golf club
having a golf club head, a hosel, and a hosel shim. The golf club
head has a hosel shank and the hosel is configured to be coupled to
the hosel shank. The hosel shim is configured to be coupled to the
hosel to position the hosel at a select angle relative to the golf
club head such that the golf club has a select lie angle. The hosel
shim is further configured to limit rotational movement of the
hosel relative to the golf club head such that the select lie angle
is maintained when the hosel is coupled to the golf club head.
[0042] In some embodiments, a kit includes a golf club having a
golf club head and a hosel. The golf club head has a hosel shank to
which the hosel is configured to be coupled. The kit further
includes multiple selectable hosel shims. Each hosel shim from the
multiple selectable hosel shims is configured to be selectively
coupled to the hosel to position the hosel at a select angle
relative to the golf club head such that the golf club has a select
lie angle. The select hosel shim is configured to limit rotational
movement of the hosel relative to the golf club head such that the
select lie angle is maintained when the hosel is coupled to the
golf club head.
[0043] In some embodiments, an apparatus includes a golf club
including a golf club head, a hosel, and a hosel shim. The golf
club head has a hosel shank to which the hosel is configured to be
coupled. The hosel shim is configured to be coupled to the hosel in
a first position for a right handed user and a second position
different than the first position for a left handed user. The hosel
is disposed at a first angle relative to the golf club head when
the hosel shim is coupled to the hosel in the first position such
that the golf club has a select lie angle. The hosel is disposed at
a second angle relative to the golf club head when the hosel shim
is coupled to the hosel in the second position such that the golf
club has the select lie angle.
[0044] In some embodiments, an apparatus includes a golf club
having a golf club head, a hosel, a hosel shim and an alignment
rod. The hosel is configured to be coupled to the golf club head.
The hosel shim defines multiple alignment openings, and the
alignment rod is configured to be received in a select one of the
alignment openings from the multiple alignment openings such that
the hosel is disposed at a select angle relative to the golf club
head and the golf club has a select lie angle. The alignment rod is
configured to limit rotational movement of the hosel relative to
the golf club head such that the select lie angle is maintained
when the hosel is coupled to the golf club head. With the hosel
shim rotated 180 degrees, the alignment rod can provide an
identical lie angle position for the opposite dexterity.
[0045] FIGS. 1A and 1B are side views of an adjustable putter 100,
according to an embodiment. FIG. 1C is a top view of the putter
100. The putter 100 includes a face 110, a head 120 and a hosel
150. The hosel 150 can be coupled to the head 120 and used to
couple the putter 100 to a shaft (not shown) of the putter. The
angle of the face 110 relative to the head 120 of the putter 100
can be changed (as described in further detail herein) to adjust
the loft angle of the putter 100. The loft angle can be adjusted
over any suitable range, such as, for example, from -5.degree. to
15.degree.. In some embodiments, as described in further detail
herein, discrete loft angles may be selectable. For example, the
face 110 may be coupled to the head 120 such that the putter 100
has a 0.5.degree., 3.degree., or 5.5.degree. loft angle. In other
embodiments, the loft angle may be continuously variable over any
suitable range.
[0046] As shown in FIG. 1B, the face 110 of the putter 100 can
include a scale 115 that can indicate a selected loft angle. For
example, the head 120 can include a loft indicator 125 that can be
aligned with a selected indicator "X" when the putter 100 has a
loft angle of 5.5.degree., indicator "Y" when the putter 100 has a
loft angle of 3.degree., and indicator "Z" when the putter 100 has
a loft angle of 0.5.degree.. As shown, the putter 100 is in a "Y"
configuration, having loft angle of 3.degree..
[0047] As shown in the top view of FIG. 1C, the face 110 can be
slidably coupled to the head 120. In some embodiments, as described
in further detail herein, the loft angle can be adjusted by
removing and repositioning the face 110. For example, the face 110
can be coupled to the head 120 in multiple configurations. A bolt
130 can be used to couple the face 110 to the head 120, such that
the face 110 can be fixed in position and the loft angle can be
prevented from being inadvertently changed. In some such
embodiments, the head 120 can include a stop (not shown) operable
to prevent the face 110 from sliding past an edge of the head 120.
In this way, the face 110 can be secured to the head 120 by a
single bolt 130. For example, the stop can be disposed on an
opposite edge of the head 120.
[0048] The face 110 can be constructed of high-strength plastic,
steel, titanium, and/or any other suitable material. In some
embodiments, the head 120 can be configured to be used with one of
multiple faces having different characteristics. In other words,
the putter 100 can have multiple different selectable faces 110
that can be coupled to the head 120. In some embodiments, the face
110 can be painted, pigmented (e.g., in the case where the face 110
is constructed of high-strength plastic), etched, and/or otherwise
marked such that the user can determine the characteristics of the
face. In some embodiments the face 110 may receive a variety of
different face insert materials affecting characteristics such as,
for example, feel, sound and roll. Moreover, surface finishes of
the faces 110 (e.g., CNC milling, grooves, mirrored and textured)
may also influence ball spin and provide a variety of cosmetic
presentations.
[0049] FIG. 2A is a side view of a portion of the putter 100, and
FIG. 2B is a detail view of a portion A of FIG. 2A, illustrating
the face 110. As described above, the face 110 can be adjustably
coupled to the head 120 of the putter 100.
[0050] In this embodiment, as shown, for example, in FIG. 2B, the
face 110 includes grooves 112 that can receive a projection 122 of
the head 120. In this embodiment, the face 110 includes two sets of
three grooves 112, while the head 120 includes two projections 122,
each projection 122 corresponding to a set of grooves 112. The loft
angle of the putter 100 can be adjusted by selecting a groove 112
in which to dispose the projection 122. In other words, each groove
112 corresponds to a different selectable loft angle.
[0051] FIG. 3 depicts a side view of a portion of an alternative
embodiment of a putter 200 including a head 220 and a face 210. In
this embodiment, the putter 200 includes a single set of three
grooves defined by the face 210, and a single corresponding
projection on the head 220. In other embodiments the face 210 can
have any number of grooves and/or the head 220 can include any
number of projections. In addition or alternatively, the face 210
can include one or more projections and/or the head 220 can include
one or more corresponding grooves.
[0052] FIGS. 4A and 4B are partially exploded perspective views of
a putter 400 having an adjustable loft angle, according to an
embodiment. The putter 400 includes a face 410 and a head 420, each
of which can be similar to the face 110 and the head 120 shown and
described above. Bolts 430 can be used to couple the face 410 to
the head 420.
[0053] In this embodiment, the loft angle of the putter 400 can be
adjusted via a selected shim 442. The shim 442 can be coupled
between the face 410 and the head 420 using for example, bolts 430.
In some embodiments, a putter 400 can be provided with multiple
different shims to selectively change the loft angle of the putter
400. The shim(s) 442 can have various different shapes, sizes,
configurations, etc. to provide various different loft angles. For
example, in some embodiments, a shim 442 can provide a particular
loft angle, such as for example, a 30 loft angle. In some
embodiments a shim 442 can be reversible. For example, in such an
embodiment, the shim 442 can be coupled to the head 420 and face in
a first orientation or position to provide a first loft angle, and
can be moved to a second orientation or position to provide a
second loft angle. For example, in some embodiments, a shim 442 can
provide the putter 400 with a 0.5.degree. loft angle when in a
first position or orientation and can provide the putter 400 with a
5.degree. loft angle when in a second position or orientation. For
example, in some such embodiments, the shim 442 can be coupled to
the face 410 and head 420 in a first orientation to obtain the
first loft angle, and can be coupled to the face 410 and head 420
in a reversed or rotated second position or orientation (e.g.,
rotated 180.degree.) to obtain the second loft angle. In other
examples, a shim 442 can be used to set the loft angle to any
suitable angle, such as between, for example, -5.degree. and
15.degree..
[0054] The putter 400 can be configured to be used with any number
of selectable shims. For example, shims that can provide the putter
400 with various suitable loft angles can be disposed between the
face 410 and the head 420. Shims can be constructed of any suitable
material, such as steel, high-strength plastic, rubber, polymers,
etc. Shims can also be provided having a particular a color or
color marking that indicates the particular loft angle, or can
otherwise be marked to indicate the loft angle to which they
correspond. In some embodiments, multiple shims can be used to
adjust the putter 400 to the desired loft angle. For example,
multiple shims 442 can be coupled between the face 410 and the head
420 of the putter 400 to achieve a desired loft angle.
[0055] FIG. 5A is an exploded view of a portion of a putter 500,
according to an embodiment. FIG. 5B is a perspective view of a
hosel 550 of the putter 500 with a hosel shim 560 coupled thereto,
and FIG. 5C is a rear view of the putter 500 (shown with the outer
bushing 570 and hosel bolt 580 transparent for illustration
purposes). The hosel 550 can be adjustably coupled to a head 520 of
the putter 500 via a hosel shank 522 of the head 520 (see, e.g.,
FIGS. 5A and 5C). The hosel 550 includes a mounting portion 558
that defines a lumen or through-hole 553 (see, e.g., FIG. 5B) that
can receive the hosel shank 522. A hosel shim 560 (also referred to
as a "lie angle shim") can be disposed between the hosel 550 and
the head 520 of the putter 500. The putter 500 further includes two
bushings 570 and a hosel bolt 580. The bushings 570 can be used to
position the hosel 550 on the hosel shank 522. The hosel bolt 580
can secure the hosel 550 to the head 520.
[0056] FIGS. 5D and 5E are front and rear views, respectively, of
the shim 560. The hosel shim 560 has an inner perimeter 568
configured to cooperate with the mounting portion 558 of the hosel
550, and an outer perimeter portion 569 configured to cooperate
with a retaining portion 529 (see, e.g., FIGS. 5A and 5C) of the
head 520. The inner perimeter 568 of the hosel shim 560 can have a
profile that matches a surface of the mounting portion 558 of hosel
550 such that the hosel shim 560 can be slid onto the mounting
portion 558 of the hosel 550. When the hosel shim 560 is coupled to
the mounting portion 558, surface portions 561 on the hosel shim
560 can contact corresponding surfaces 559 on the mounting portion
558 (see e.g., FIG. 5B) to prevent the hosel shim 560 from rotating
relative to the hosel 550.
[0057] Similarly, the outer perimeter 569 of the hosel shim 560 can
have a profile configured to contact a retaining portion 529 of the
head 520. For example, the outer perimeter 569 can have a feature
579 (e.g., a shoulder, projection, notch, groove and/or other
suitable structure) that can contact or engage a top edge portions
527 of retaining portion 529. In this way, the hosel shim 560 can
be slidably coupled to the head 520, and the outer features 579
when engaged with the top edge portions 527 can help prevent the
hosel shim 560 from rotating relative to the head 520. Thus, when
the hosel 550 and the hosel shim 560 are collectively coupled to
the head 520, rotational movement of the hosel 550 relative to the
head 520 can be limited or prevented.
[0058] The hosel shim 560 can be used to set the lie angle L of the
putter 520 (see, e.g., FIG. 5C). For example, each of FIGS. 6A-6C,
illustrate the use of a different shim 562, 564 and 566,
respectively, coupled to the hosel 550 to provide a different lie
angle L for the putter 500. Thus, the putter 500 can be adjusted to
have any suitable and/or desired lie angle. In some embodiments,
the putter 500 can be adjusted to have a lie angle, between, for
example, 57.degree. and 79.degree.. The hosel 550 can be reversed
to change the putter 500 from a right handed putter to a left
handed putter. In this way, the putter 500 can have an adjustable
lie angle and an adjustable handedness using a single hosel 550 and
interchangeable hosel shim 560.
[0059] For example, as shown in FIG. 5A, the hosel bolt 580 can be
decoupled from the head 520 of the putter 500, which can allow the
hosel 550 to be removed from the hosel shank 522 and the hosel shim
560 to be removed from the hosel 550. A hosel shim, such as, for
example, one of the shims 560, 562, 564, or 566 can be coupled to
the hosel 550. The hosel 550, including the selected hosel shim can
be re-coupled to the head 520. The hosel shim can cooperate with
the hosel 550 and/or the head 520 to fix the position of the hosel
550 relative to the head 520 when the hosel 550 is coupled to the
head 520.
[0060] The hosel shims 560, 562, 564, 566 can be color coded and/or
otherwise marked to indicate the lie angle of the putter based on
the selected shim. For example, as shown in FIGS. 6A-6C the shims
562, 564, and 566 are each marked with an indication of the lie
angle corresponding to that shim. Shim 562 is marked with an "F",
which can indicate, for example, a flat lie angle, such as a flat
lie angle of, for example, 68.degree.. Similarly, the shim 564 is
marked with an "S", which can indicate, for example, a standard lie
angle, such as a standard lie angle of, for example, 71.degree..
Furthermore, the shim 566 is marked with a "U", which can indicate
an upright lie angle, such as an upright lie angle of, for example,
74.degree.. In some embodiments, the shim can include a numerical
indicator corresponding to the particular lie angle associated with
that shim. The hosel shims 560, 562, 564, 566 can be constructed of
any suitable material, such as, for example, steel or high strength
plastic.
[0061] FIG. 7 is an illustration of a disassembled adjustable hosel
system, according to another embodiment. The adjustable hosel
system 775 includes a hosel 750, a front hosel bushing (also
referred to as a "hosel shim" or "lie angle shim") 762, a rear
hosel bushing (also referred to as a "hosel shim" or "lie angle
shim") 764, washers 766 and an alignment rod 770. The hosel 750,
hosel bushings 762, 764, and washers 766 are operable to be
slidably disposed over a hosel shank (which can be similar to the
hosel shank 522 as shown and described with reference to FIG.
5A).
[0062] The hosel 750 can define hosel holes 755 and the hosel
bushings 762, 764 can define bushing holes 765. The alignment rod
770 can be disposed through a select hosel hole 755 and
corresponding select bushing hole 765. As shown in FIG. 8, when
disposed on a hosel shank (not shown in FIG. 8) of a putter 700,
the adjustable hosel system 775 can have a fixed rotational
position. For example, the hosel 750 can be fixed relative to a
head 720 of the putter 700 when the alignment rod 770 is disposed
through a hosel hole 755. When the alignment rod 770 is removed
from the hosel 750, the hosel 750 can rotate on the hosel shank. In
this way, the hosel 750 can be rotated to align a select hosel hole
755 with a select bushing hole 765 to adjust the lie angle of the
putter 700. After being aligned, the alignment rod 750 can be
disposed within the hosel 750, locking the hosel 750 in
position.
[0063] In some embodiments, the front hosel bushing 762 of the
hosel 750 can include markings, such as color codes, etched
markings, and/or other suitable indicators associated with the lie
angle. For example, one hole can be marked by an "F" to indicate
that the hosel will be at a flat lie angle relative to the head
720, a second hole can be marked by a "S," and a third hole can be
marked with a "U" to indicate that the hosel 750 will be at a
standard and upright lie angle, respectively, relative to the head
720.
[0064] A retaining bolt or nut (not shown in FIG. 8) can be coupled
to the front bushing 762 and/or the alignment rod 770, and/or
otherwise coupled to the head 720 to lock the alignment rod 770 and
the lie angle in position. The hosel bushings 762, 764 can be
constructed of any suitable material, such as, for example, steel,
high-strength plastic, etc.
[0065] FIGS. 9A-9C illustrate a hosel system of an adjustable
putter, according to another embodiment. FIG. 9A is a top view of a
hosel 950, a first hosel bushing (also referred to as a "hosel
shim" or "lie angle shim") 962, and a second hosel bushing (also
referred to as a "hosel shim" or "lie angle shim") 966, according
to another embodiment. FIG. 9B is a detail view of a portion of the
hosel 950 and hosel bushings 962, 966 of FIG. 9A. The hosel 950
includes a set of grooves 952 and the first hosel bushing 962
includes a projection 963. The projection 963 of the first bushing
962 can be selectively disposed within a selected groove of the set
of hosel grooves 952 to adjust the angle of the hosel 950 to the
bushing 962. By adjusting the angle of the hosel 950 relative to
the bushing 962, the lie angle of a putter can be adjusted. For
example, as similarly shown and described above with reference to
FIGS. 6A-6C, the bushing 962 can be operable to fix the position of
the hosel 950 relative to a head of a putter. The projection 967 of
the second bushing 966 can similarly be selectively disposed within
a selected groove of a set of multiple grooves 964 defined by the
first bushing 962 to further adjust the lie angle of the
putter.
[0066] FIG. 10 is a schematic diagram of a hosel bushing 1060
having a projection (not shown) configured to be received by one of
several grooves of a hosel 1050, 1055 in a similar manner as
described above for other embodiments. FIG. 10 depicts a right
handed hosel 1050 and a left handed hosel 1055. The projections and
the grooves can be operable to prevent the hosel 1050, 1055 from
rotating relative to the hosel bushing 1060 when coupled to a head
of a putter. In some embodiments, the grooves can be disposed 3.5
degrees apart from each other. In this way, lie angles between, for
example, 64.degree. to 81.degree. at 3.5.degree. increments can be
selected. In other embodiments, the grooves of the hosel 1050, 1055
can be operable to allow any suitable lie angle and/or any suitable
increments to be selected.
[0067] FIG. 11 is a schematic diagram of a hosel bushing 1160 and
right and left handed hosels 1150, 1155, respectively, according to
another embodiment. The hosel bushing 1160 and/or the hosels 1150,
1155 can be similar to the hosels and bushings shown and described
with reference to FIG. 10, except as shown in FIG. 11, the hosels
can have a single projection operable to lock the hosel into
position at a selected lie angle.
[0068] FIGS. 12 and 13 illustrate a portion of an adjustable
putter, according to another embodiment. A putter 1200 includes a
head 1220 and a face 1210, which can be similar to, for example,
the head 120 and face 110, respectively, described above. Bolts
1230 can be used to couple the face 1210 to the head 1220 in a
similar manner as described above for putter 100. The head 1210
includes a hosel shank 1222 to which a hosel 1250 can be coupled.
The hosel 1250 can be adjustably coupled to the head 1220 (via the
hosel shank 1222) using a selected hosel shim (also referred to as
a "lie angle shim") 1260 that can be used to adjust the lie angle
of the putter 1200 as described in more detail below.
[0069] The hosel 1250 includes a mounting portion 1258 that defines
a through-hole or lumen 1253 through which the hosel shank 1222 of
the head 1220 can be received. The hosel 1250 also defines a
threaded top opening 1257. The hosel shim 1260 defines a lumen or
through-hole 1285 and can be coupled to the hosel 1250 with, for
example, a set screw 1282. For example, the set screw 1282 can be
received through the through-hole 1285 and the top opening 1257 of
the hosel 1257 and terminate in contact with the hosel shank 1222.
The mounting portion 1258 of the hosel 1250 includes a top mounting
feature 1251 (see, e.g., FIG. 13) on which the hosel shim 1260 can
matingly be coupled and which can be used to move the hosel 1250
relative to the head 1220 to set the putter 1200 at the desired lie
angle as described in more detail below.
[0070] The putter 1200 further includes bushings 1270 (see, e.g.,
FIG. 13) and a hosel bolt 1280. The bushings 1270 can be used to
position the hosel 1250 on the hosel shank 1222 (see, e.g., FIG.
13) of the head 1220, and can be adjusted to change the shaft
offset of the putter 1200 as described in more detail below with
reference to FIGS. 25A-25C. The hosel bolt 1280 can be received
through the through-hole 1253 and a lumen of the hosel shank 1222
to secure the hosel 1250 to the head 1220. The hosel bolt 1280 can
provide a threaded coupling to the hosel shank 1222. For example,
the hosel bolt 1280 can include a threaded portion (not shown)
configured to mate with a threaded portion (not shown) within the
interior of the hosel shank 1222. Bolts 1272 can be used to add
weight to the putter 1200. For example, the putter can include one
or more sets of bolts 1272 each having a different weight. Thus, a
user can selectively use a set of bolts 1272 to achieve a desired
weight of the putter 1200.
[0071] In this embodiment, the hosel 1250 and hosel bushings 1270
can be coupled to the hosel shank 1222 of the head 1220, and then
the hosel shim 1260 can be coupled to the hosel 1250 from above or
from a vertical direction. For example, the hosel 1250 and bushings
1270 can be slid over the hosel shank 1222, and the hosel shim 1260
can be installed over the hosel 1250 after the hosel 1250 has been
slid into position on the hosel shank 1222. The hosel bolt 1280 can
be placed through an opening of the bushings 1270 and through the
through-hole 1253 of the mounting portion 1258 of the hosel 1250.
Although the bushings 1270 are shown disposed next to each other in
the exploded view, the bushings 1270 can be reconfigured relative
to the hosel 1250 to adjust a shaft offset of the putter 1200 as
described in more detail below. For example, the bushings 1270 can
be positioned such that one bushing 1270 is placed on the hosel
shank 1222, then the hosel 1250 and then the other bushing 1270.
Thus, a bushing 1270 is disposed on each side of the mounting
portion 1258 of the hosel 1250. The bushings 1270 can also be
arranged such that the hosel 1250 is placed on the hosel shank 1222
and then both bushings 1270.
[0072] As shown in FIG. 14, the shim 1260 defines an opening or
though-hole 1285 and includes an interior surface 1283 having an
angled surface portion 1284. The interior surface 1283
substantially corresponds to the mounting feature 1251 and a top
portion of the mounting portion 1258 of the hosel 1250. When the
hosel shim 1260 is disposed on the mounting portion 1258 of the
hosel 1250, the angled surface portion 1284 mates with or contacts
the mounting feature 1251 of the mounting portion 1258, and the
hosel shim 1260 moves or rotates the hosel 1250 relative to the
hosel shank 1222, thus positioning the hosel 1250 relative to the
hosel shank 1222. The lie angle will be set based on the particular
angle of the angled surface portion 1284. Thus, the hosel 1250 can
rotate back and forth relative to the hosel shank 1222 until the
hosel shim 1260 is placed in position on the hosel 1250. The set
screw 1282 can then be installed from above or in a vertical
direction through the opening 1285 of the shim 1260 and the
through-hole 1257 of the hosel 1250, securing the hosel shim 1260
in position, and preventing movement or rotation of the hosel 1250.
The hosel bolt 1280 can then secure the hosel 1250 to the head
1220.
[0073] As described above, the lie angle of the putter 1200 can be
adjusted by using a selected hosel shim 1260. The lie angle (see
e.g., FIGS. 5C and 18) is an angle between the hosel 1250 and the
head 1220. For example, the lie angle can be an angle between a
longitudinal axis of the hosel 1250 and, for example, a bottom
surface of the head 1220 (see, e.g., FIG. 18).
[0074] A multitude of different hosel shims 1260 providing
different lie angle positions can be selectively used. The hosel
shim 1260 can also be reversible to accommodate both right and left
handed users. For example, a hosel shim 1260 can be installed in a
first position for a right handed user of the putter 1200 and can
be installed in a reversed position (e.g., rotated 180 degrees) for
a left handed user of the putter 1200.
[0075] FIGS. 15A-15C, 16A-16C, and 17A-17B illustrate three example
hosel shims that can be used with the putter 1200. A hosel shim
1262 provides a 68 degree lie angle, a hosel shim 1264 provides a
71 degree lie angle and a hosel shim 1264 provides a 74 degree lie
angle. As described above, the particular lie angle provided by a
hosel shim is defined by an interior geometry of that hosel shim.
For example, as shown, in FIGS. 15A-15C, 16A-16C, and 17A-17C, each
of the shims 1262, 1264, 1266 defines an angled interior surface
portion 1284. When the hosel shim 1262, 1264, 1266 is disposed on
the mounting portion 1258, the angled surface portion 1284 mates
with or contacts a top surface portion 1286 of the mounting portion
1258, as described above for shim 1260.
[0076] FIGS. 15A-15C and 16A-16C, illustrate the reversibility of
the hosel shims 1262, 1264, 1266 to accommodate both right and left
handed users. For example, FIG. 15A-15C illustrate the hosel shims
1262, 1264, 1266 oriented for a right handed user, and FIGS.
16A-16C illustrate the hosel shims 1262, 1264, 1266 oriented for a
left handed user.
[0077] The hosel shims 1260, 1262, 1264, 1266 can be color coded
and/or otherwise marked to indicate the lie angle of the selected
shim as described above for previous embodiments. The hosel shims
1260, 1262, 1264, 1266 can be constructed of any suitable material,
such as, for example, steel or high strength plastic.
[0078] FIGS. 18-20 illustrate a portion of an adjustable putter,
according to another embodiment. A putter 1300 includes a head 1320
and a face 1310, which can be similar to, for example, the head 120
and face 110, respectively, described above. Bolts 1330 can be used
to couple the face 1310 to the head 1320 in a similar manner as
described above for putter 100. The head 1310 includes a hosel
shank 1322 to which a hosel 1350 can be coupled. The hosel 1350 can
be adjustably coupled to the head 1320 (via the hosel shank 1322)
using a selected hosel shim (also referred to as a "lie angle
shim") 1360 that can be used to adjust the lie angle of the putter
1300. The hosel 1350 includes a mounting portion 1358 that defines
a through-hole or lumen 1353 through which the hosel shank 1322 of
the head 1320 can be received. The hosel 1350 also defines a
threaded top opening 1357. The hosel shim 1360 defines a lumen or
through-hole 1385 and can be coupled to the hosel 1350 with, for
example, a set screw 1382. For example, the set screw 1382 can be
received through the through-hole 1385 and the top opening 1357 of
the hosel 1357 and terminate in contact with the hosel shank 1322.
The mounting portion 1358 of the hosel 1350 includes a top mounting
feature 1351 on which the hosel shim 1360 can matingly be coupled
and which can be used to move the hosel 1350 to set the putter 1300
at the desired lie angle as described in more detail below.
[0079] The putter 1300 further includes bushings 1370 (see, e.g.,
FIG. 19) and a hosel bolt 1380. The bushings 1370 can be used to
position the hosel 1350 on the hosel shank 1322 of the head 1320,
and can be adjusted to change the shaft offset of the putter 1300,
as described in more detail below with reference to FIGS. 25A-25C.
Although the bushings 1370 are each shown disposed on one side of
the hosel 1350, as described above for the previous embodiment, the
bushings 1370 can be reconfigured relative to the hosel 1350 to
adjust a shaft offset of the putter 1300 as described in more
detail below. For example, the bushings 1370 can be positioned such
that both bushings 1370 are disposed on the hosel shank 1322 on one
side of the mounting portion 1358 of the hosel 1350.
[0080] The hosel bolt 1380 can be received through the through-hole
1353 and a lumen of the hosel shank 1322 to secure the hosel 1350
to the head 1320. The hosel bolt 1380 can provide a threaded
coupling to the hosel shank 1322. For example, the hosel bolt 1380
can include a threaded portion (not shown) configured to mate with
a threaded portion (not shown) within the interior of the hosel
shank 1322. Bolts 1372 can be used to add weight to the putter
1300. For example, the putter 1300 can include one or more sets of
bolts 1372 each having a different weight. Thus, a user can
selectively use a set of bolts 1372 to achieve a desired weight of
the putter 1300.
[0081] In addition to using the bolts 1372 to adjust the weight of
the putter 1300, the putter can include inserts 1371 and/or 1373.
Inserts 1371 and 1373 can be various shapes and sizes and can be
formed with, for example, steel or tungsten/nickel. The inserts
1371 and/or 1373 can be used, to help provide the putter 1300 a
desired weight.
[0082] As described above, the lie angle of the putter 1300 can be
adjusted by using a selected hosel shim 1360. The lie angle L (see,
e.g., FIG. 18) is an angle between the hosel 1350 and the head
1320. For example, the lie angle L can be defined as an angle
between a longitudinal axis of the hosel 1350 and, for example, a
bottom surface of the head 1320.
[0083] As with the previous embodiment, the hosel 1350 and hosel
bushings 1370 can be coupled to the hosel shank 1322 of the head
1320, and then the hosel shim 1360 can be coupled to the hosel 1350
from above or from a vertical direction. For example, the hosel
1350 and bushings 1370 can be slid over the hosel shank 1322, and
the hosel shim 1360 can be installed over the hosel 1350 after the
hosel 1350 has been slid into position on the hosel shank 1322. The
hosel bolt 1380 can be placed through an opening of the bushings
1370 and through the through-hole 1353 of the mounting portion 1358
of the hosel 1350.
[0084] As shown, for example, in FIGS. 21-23, the shim 1360 defines
an opening or through-hole 1385 and includes an interior surface
1387 having an angled surface portion 1389. The interior surface
1387 substantially corresponds to the mounting feature 1351 and a
top portion of the mounting portion 1358 of the hosel 1350. The
hosel shim 1360 can also include a flange 1391 (see, e.g., FIGS. 21
and 22) that can be matingly received within the through-hole 1357
of the hosel 1350. Thus, the outer surface of the mounting portion
1358 and the interior surface 1387 of the hosel shim 1360 can
matingly interconnect. When the hosel shim 1360 is disposed on the
mounting portion 1358 of the hosel 1350, the angled surface portion
1389 mates with or contacts the mounting feature 1351 of the
mounting portion 1358 and the hosel shim 1360 moves or rotates the
hosel 1350 relative to the hosel shank 1322, to position the hosel
1350 relative to the hosel shank 1322. The lie angle can be set
based on the particular angle of the angled surface portion 1389.
Thus, the hosel 1350 can rotate back and forth relative to the
hosel shank 1322 until the hosel shim 1360 is placed in position on
the hosel 1350. For example, the hosel 1350 can rock in the
direction of arrows B and C shown in FIG. 20. The set screw 1382
can then be installed from above or in a vertical direction through
the opening 1385 of the hosel shim 1360 and the through-hole 1357
of the hosel 1350, securing the hosel shim 1360 in position, and
preventing movement or rotation of the hosel 1350. The hosel bolt
1380 can then secure the hosel 1350 to the head 1320 as previously
described.
[0085] As with the previous embodiment, multiple different hosel
shims 1360 can be selectively used to provide a different desired
lie angle for the putter 1300. For example, as shown in FIG. 22,
the hosel shim 1360 can include an angled surface portion 1389
configured to provide the putter 1300 with a 68 degree lie angle, a
72 degree lie angle or a 74 degree lie angle. These are merely
example, as hosel shims 1360 can be configured to provide different
lie angles. The hosel shim 1360 can also be reversible for right
and left handed users. For example, a hosel shim 1360 can be
installed in a first position for a right handed user of the putter
1300 and can be installed in a reversed position (e.g., rotated 180
degrees) for a left handed user of the putter 1300.
[0086] FIGS. 24A and 24B illustrate the reversibility of the hosel
shim 1360 for right and left handed users. For example, FIG. 24A
illustrates the hosel shim 1360 oriented for a right handed user,
and FIG. 24B illustrates the hosel shim 1360 oriented for a left
handed user.
[0087] Also as described for previous embodiments, the hosel shim
1360 can be color coded and/or otherwise marked to indicate the lie
angle as described above for previous embodiments. The hosel shim
1360 can be constructed of any suitable material, such as, for
example, steel or high strength plastic.
[0088] FIGS. 25A-25C illustrate a schematic representation of a
portion of a putter to illustrate the adjustability of a shaft
offset of a putter. The shaft offset OS is an offset distance of
the shaft or a shaft connection portion of the hosel relative to
the face of the putter, as shown in FIGS. 25A-25C. The shaft offset
can be adjusted by changing relative positions of the hosel and the
bushings along an axis substantially perpendicular to a plane
parallel to a plane of the planar face of the putter.
[0089] As shown in FIGS. 25A-25C, a putter 1400 includes a hosel
1450, bushings 1470, a face 1410, and a hosel bolt 1480. The hosel
1450 includes a mounting portion 1458 and a shaft connection
portion 1454. Although not shown, the putter 1400 can also include
the same or similar components, and provide similar or the same
functions, as described above for previous embodiments, such as
shown and described for putter 1200 and/or putter 1300.
[0090] FIG. 25A illustrates the putter 1400 with a "full shaft"
offset OS. In this configuration, the shaft connection portion 1454
(and shaft) is positioned forward of the face 1410. To achieve this
configuration, the hosel mounting portion 1458 is disposed on the
hosel shank (not shown) forward of the two bushings 1470. FIG. 25B
illustrates the putter 1400 with a "half shaft" offset OS. In this
configuration, the face 1410 is positioned in alignment with a
centerline CL of the shaft connection portion 1454 of the hosel
1450. For example, a location P on the front surface of the face
1410 is aligned with or within the same plane as a plane
corresponding to the centerline CL of the shaft connection portion
1454. To achieve this configuration, the mounting portion 1458 is
disposed on the hosel shank 1422 between the two bushings 1470.
[0091] FIG. 25C illustrates the putter 1400 with a "zero" offset
OS. In this configuration, there is no offset and no progression of
the face 1410 forward of the shaft connection portion 1454 of the
hosel 1450. To achieve this configuration, the two bushings 1470
are disposed on the hosel shank 1422 forward of the mounting
portion 1458 of the hosel 1450. Although the putter 1400
illustrates the shaft offset adjustability using two bushings 1470
that are the same, additional configurations (shaft offset
settings) can be achieved using more than two bushings 1470 and/or
using bushings that are not the same.
[0092] In some embodiments, a golf club kit can be provided that
can include a golf club and multiple selectable hosel shims (or lie
angle shims) and/or one or more loft angle shims as described
herein. For example, multiple hosel shims can be provided with each
being configured to provide the golf club with a select lie angle.
Multiple loft angle shims can also be included with each providing
the golf club with a different loft angle. Thus, a golf club kit
can also optionally provided one or more tools that can be used to
removably couple or decouple a hosel shim and or a loft angle shim
to the golf club such that a user can adjust or change various
parameters of the golf club as desired. A golf club kit can also
include instructions for coupling and removing a lie angle shim or
a loft angle shim as described herein.
[0093] While various embodiments have been described above, it
should be understood that they have been presented by way of
example only, and not limitation. For example, although some
embodiments describe a putter, in other embodiments any golf club
can include features and functions described herein. Furthermore,
although various embodiments have been described as having
particular features and/or combinations of components, other
embodiments are possible having a combination of any features
and/or components from any of embodiments where appropriate as well
as additional features and/or components. For example, although
some embodiments describe a putter with an adjustable lie angle and
other embodiments describe a putter with an adjustable loft angle,
a putter can incorporate both an adjustable lie angle and an
adjustable loft angle.
* * * * *