U.S. patent application number 09/780282 was filed with the patent office on 2002-01-10 for multi-position exercise bicycle.
Invention is credited to Galbraith, Richard Scott, Iund, Neal Alexander, Poulsen, Joshua Brent, Richardson, Kary Dell.
Application Number | 20020004439 09/780282 |
Document ID | / |
Family ID | 26877147 |
Filed Date | 2002-01-10 |
United States Patent
Application |
20020004439 |
Kind Code |
A1 |
Galbraith, Richard Scott ;
et al. |
January 10, 2002 |
Multi-position exercise bicycle
Abstract
An exercise bicycle has a frame with longitudinal, lateral, and
transverse directions substantially orthogonal to one another. A
crank, characterized by a crank axis and corresponding axial and
radial directions, connects to a rotational resistance mechanism.
The frame is configured to selectively support a user in either a
first, classical, position and a second, semi-recumbent,
position.
Inventors: |
Galbraith, Richard Scott;
(Hyde Park, UT) ; Iund, Neal Alexander;
(Centerville, UT) ; Richardson, Kary Dell;
(Riverton, UT) ; Poulsen, Joshua Brent; (Tooele,
UT) |
Correspondence
Address: |
A. John Pate
PATE PIERCE & BAIRD
Bank One Tower
50 West Broadway, Suite 900
Salt Lake City
UT
84101
US
|
Family ID: |
26877147 |
Appl. No.: |
09/780282 |
Filed: |
February 9, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60181398 |
Feb 9, 2000 |
|
|
|
Current U.S.
Class: |
482/57 |
Current CPC
Class: |
A63B 2208/0238 20130101;
A63B 2208/0233 20130101; A63B 2022/0652 20130101; A63B 22/0605
20130101 |
Class at
Publication: |
482/57 |
International
Class: |
A63B 069/16; A63B
022/06 |
Claims
What is claimed and desired to be secured by United States Letters
Patent is:
1. An apparatus, the apparatus comprising: a frame having
longitudinal, lateral, and transverse directions substantially
orthogonal to one another; a crank, characterized by a crank axis
and corresponding axial and radial directions, the crank being
connected to the frame to rotate about the crank axis; and the
frame further configured to selectively support a user in a first,
classical, riding position and a second, semi-recumbent, riding
position.
2. The apparatus of claim 1, wherein the frame is further
characterized by a first seating location corresponding to the
first riding position and a second seating location corresponding
to the second riding position, the frame being configured to
position a hip joint of a user substantially the same radial
distance from the crank axis when a user is in the first seating
location and in the second seating location.
3. The apparatus of claim 2, wherein the second seating location is
spaced radially and substantially longitudinally behind the crank
axis.
4. The apparatus of claim 2, wherein the first seating location is
spaced radially and substantially transversely above the crank
axis.
5. The apparatus of claim 4, wherein the second seating location is
spaced radially and substantially longitudinally behind the crank
axis.
6. The apparatus of claim 5, further comprising: a handlebar; and
the frame, further comprising a first post having a proximal end
secured to extend away therefrom and a distal end configured to
secure the handlebar.
7. The apparatus of claim 6, wherein the first post is pivotably
secured to support the handlebar in a first handlebar position,
corresponding to the first riding position, and a second handlebar
position, corresponding to the second riding position.
8. The apparatus of claim 7, the apparatus further comprising: at
least one seat; and the frame further comprising a second post
having a proximal end secured to extend away therefrom and a distal
end configured to support the at least one seat.
9. The apparatus of claim 8, wherein the second post is pivotably
secured to support the at least one seat in a first seat position,
corresponding to the first riding position, and a second seat
position, corresponding to the second riding position.
10. The apparatus of claim 9, wherein the crank is connected to
drive a resistance mechanism.
11. The apparatus of claim 10, wherein the resistance mechanism is
a rotational resistance mechanism selected from the group
consisting of a friction belt, an electromagnetic wheel, a disk
brake, a drum brake, a fluid damper, and an air fan.
12. The apparatus of claim 11, further comprising a console having
a control module configured to control resistance of the resistance
mechanism.
13. The apparatus of claim 1 comprising: a handlebar; and the
frame, further comprising a first post having a proximal end
secured to extend away therefrom and a distal end configured to
secure the handlebar.
14. The apparatus of claim 1, further comprising a first post and a
handlebar, the first post pivotably secured to support the
handlebar in a first handlebar position, corresponding to the first
riding position, and a second handlebar position, corresponding to
the second riding position.
15. The apparatus of claim 1, further comprising: at least one
seat; and the frame further comprising a second post having a
proximal end secured to extend away therefrom and a distal end
configured to support the at least one seat.
16. The apparatus of claim 1, further comprising a second post and
at least one seat, wherein the second post is pivotably secured to
support the at least one seat in a first seat position,
corresponding to the first riding position, and a second seat
position, corresponding to the second riding position.
17. The apparatus of claim 1, wherein the crank is connected to
drive a resistance mechanism.
18. The apparatus of claim 1, wherein the crank is operably
connected to a resistance mechanism selected from the group
consisting of a friction belt, an electromagnetic wheel, a disk
brake, a drum brake, a fluid damper, and an air fan.
19. The apparatus of claim 1, further comprising a console
connected to the frame and including a control module configured to
control resistance of the resistance mechanism.
20. A method comprising: providing a frame having longitudinal,
lateral, and transverse directions substantially orthogonal to one
another; providing a crank, characterized by a crank axis and
corresponding axial and radial directions, the crank being
connected to the frame to rotate about the crank axis; and
configuring the frame to support a user of arbitrary stature
selectively in a first, classical, position and a second,
semi-recumbent, position, positioning a hip joint of a user at
substantially the same radial distance from the crank axis when a
user is in the first position and in the second position.
Description
RELATED APPLICATIONS
[0001] This application is a continuation of United States
Provisional Patent Application, Serial No. 60/181,398, filed on
Feb. 9, 2000 and directed to a Multi-Position Exercise Bike.
BACKGROUND
[0002] 1. The Field of the Invention
[0003] This invention relates to exercise equipment and, more
particularly, to novel systems and methods for configuring an
exercise bicycle.
[0004] 2. The Background
[0005] In an effort to generally improve one's health, many people
regularly exercise. Some may be motivated by a desire to lose
excess weight, while others may be motivated to exercise so that
they feel invigorated and have the energy they need to better
perform daily activities. Still, others may exercise to combat the
effects of a physical ailments such as heart disease, injury, or
diabetes.
[0006] Many methods of exercising exist. Fitness centers have been
developed to provide a location where paying members may use a
variety of exercise equipment and participate in aerobic classes.
These fitness centers, however, are typically expensive and involve
travel time. As appreciated by those who exercise, it is possible
to walk, run, cycle, or the like outdoors. However, outdoor
activities are often limited by the weather. In many locations,
winter conditions make outdoor exercise unpleasant. Furthermore,
outdoor exercise can prove to be a safety hazard for persons
exercising alone.
[0007] Indoor exercise bicycles have proven to be an effective and
popular choice of exercise equipment. An exercise bicycle allows a
user to exercise in the privacy of his/her home or apartment. A
user, therefore, is no longer limited by the weather or the time of
day.
[0008] The exercise bicycle can provide exercise throughout a range
of difficulty by varying the crank rotational resistance. Exercise
bicycles are simple to operate and provide low impact exercise. The
crank of an exercise bicycle cycles the legs of a user through a
large range of motion. The low impact exercise and large range of
motion combine to make exercise bicycles a popular choice for lower
body rehabilitation.
[0009] Current exercise bicycles can be classified into three
categories; (1) common bicycle held stationary while applying
resistance to the rear wheel, (2) sitting exercise bicycles, and
(3) semi-recumbent exercise bicycles. Units of the bicycle type are
typically used by persons who want to simulate outdoor cycling for
training purposes. With this form of exercise bicycle, the weight
of a user may be supported by both a handlebar and a seat. The
sitting type refers to exercise bicycles where the user's weight is
substantially supported by a seat and the crank and pedals are
positioned below and shortly forward of the user. The
semi-recumbent type refers to exercise bicycles where the user's
weight is substantially supported by a seat and possibly a seat
back. The crank and pedals are positioned substantially forward of
the user on a substantially equal level with the seat.
[0010] Each type of exercise bicycle exercises somewhat different
muscle groups. The different configurations of exercise bicycles
also provide differing levels of comfort for each users. For
example, the classical position of a machine of the bicycle type
provides the realistic body position and motion that are essential
for accurate simulation of outdoor cycling. The classical position,
however, may require a significant portion of the user's weight to
be supported by the arms and upper body of the user. Such a
position may be uncomfortable for an elderly user.
[0011] It would be an advancement in the field to provide an
exercise bicycle on which a user is able to accurately simulate the
classical cycling position, while also allowing for an alternate
semi-recumbent position. Such a bicycle would increase the range of
users of differing abilities that may efficiently exercise with a
single bicycle. Additionally, such a bicycle would provide a
variety of workouts for a user, thus, promoting interest and
provide a method for exercising different muscle groups.
BRIEF SUMMARY AND OBJECTS OF THE INVENTION
[0012] In view of the foregoing, it is a primary object of the
present invention to provide an exercise bicycle that provides both
a classical and a semi-recumbent exercise position.
[0013] It is an object of the invention to provide an exercise
bicycle which provides an accurate classical position for
simulation of outdoor cycling.
[0014] It is an object of the invention to provide an exercise
bicycle that may shift from the classical position to the
semi-recumbent position with minimal user adjustment.
[0015] It is an object of the invention to provide an exercise
bicycle that may be fully adjustable in order to accommodate the
stature of a variety of users.
[0016] Consistent with the foregoing objects, and in accordance
with the invention as embodied and broadly described herein, a
method and apparatus of the present invention are disclosed. In one
presently preferred embodiment, the exercise bicycle may be
configured to have a frame. The frame may be configured to have a
crossbar connecting a plurality of legs and stabilizers. The legs
may be configured to support the crossbar away from a supporting
surface. The stabilizers may be configured to maintain the exercise
bicycle in a proper vertical orientation.
[0017] In one presently preferred embodiment, a handlebar post may
be configured to operably secured to the crossbar. The handlebar
post may be configured to pivot with respect to the crossbar by
means of a bearing. A base for the handlebar post may be configured
to house the bearing. An extension may be configured to slide in
and out of the base to provide lengthening and shortening of the
handlebar post. A lock may be provided to maintain the extension at
a desired location with respect to the base.
[0018] A stem may be configured to secure to the distal end of the
extension. The stem secures a handlebar to the handlebar post. The
handlebar provides a location for the user to stabilize and support
himself/herself. Additionally, the handlebar provides a location
for controls and readouts that may be accessible to a user while
operating the exercise bicycle. Pivoting the handlebar post allows
access to the controls while the user is in either a classical
position or a semi-recumbent position.
[0019] Similar to the handlebar post, a seat post may be configured
to operably secure to the crossbar. The seat post may also have a
base with a bearing and an extension for providing length
adjustment. The seat post may be further configured to have an
adaptor secured at a distal end. The adaptor may provide a location
for securing a seat.
[0020] A bar may pivotably connect to the handlebar post and the
seat post. The bar allows the handlebar post and the seat post to
move in unison from the classical position to the semi-recumbent
position. The bar may be thought of as a drag link to synchronize
motion.
[0021] The classical position may be defined as the typical
position of a user on a conventional bicycle. In such a position,
the seat is located above and slightly behind the crank. The balls
of the user's feet are substantially in contact the pedals of the
crank. The legs of the user extended primarily downward are
slightly bent at the knee when the pedal passes through the lowest
region of the pedal stroke. In the classical position, a
significant portion of the user's weight may be supported by the
user's arms, which transfer the load to the handlebar.
[0022] The semi-recumbent position may be defined as a sitting
position with the legs of the user extending primarily forward. The
crank is located in front of the seat and approximately the same
level as the seat. The balls of the user's feet are substantially
in contact the pedals of the crank. The legs of the user are
preferably slightly bent at the knee when the pedal passes through
the most forward region of the pedal stoke. Substantially all of
the weight of a user is supported by the seat. A seat back provides
support in a horizontal direction.
[0023] A post lock may attach near the pivot of the handlebar post,
the seat post, or both. In one presently preferred embodiment, the
post lock may attach to the seat post and maintain it in a
classical bicycling position. When the seat post is locked in the
classical position, the bar connecting the seat post to the
handlebar post secures the handlebar post in a substantially
vertical position. In bicycles, substantially vertical orientations
are almost never exactly vertical as geometries are selected for
system strength and user comfort. When the post lock is released,
the seat post and handlebar post recline to new positions provides
a semi-recumbent position for the user.
[0024] In one presently preferred embodiment, in the semi-recumbent
position, the bicycling seat may be removed and replaced with a
chair-like seat. The chair may be configured with a bottom for
supporting the weight of a user and a back for providing
longitudinal positioning and support. The chair seat may further be
configured to have stabilizing handlebars to aid the user in
maintaining a proper balance. Additionally, the chair seat may be
adjusted to tilt forward or backward to provide a variety of
seating positions.
[0025] In an alternate embodiment, the seat post may be easily
removed from the frame. The extension of the seat post may be
removed from the base, which may be rigidly secured to the crossbar
of the frame. The bar may easily release the front the handlebar
post. With the seat post and bar removed, the handlebar post may
pivot to provide a user in the semi-recumbent position comfortable
access to the handlebar. The chair-like seat of the semi-recumbent
position may be permanently secured to the frame or may be
removable. The chair seat may also provide longitudinal adjustment
to accommodate different users.
[0026] The resistance for the exercise bicycle may be provided by a
resistance mechanism attached to the crank. The crank may be any
suitable pedal crank, such as those found on typical bicycles. The
resistance mechanism may be any mechanism that provides rotational
resistance. The crank may be connected to the resistance mechanism
by a belt, a chain, or any other suitable transfer device. In
certain embodiments, the crank and resistance mechanism may be
incorporated into a single unit. In such a mechanism, the
resistance may be applied directly to the sprocket of the crank,
thus, eliminating the need for a belt.
[0027] The pedals of the crank may be designed to promote efficient
use. In one presently preferred embodiment, the pedals are standard
flat bicycle pedals. In an alternative embodiment, the pedals may
be a specialized clipless type to promote more efficient rotation
of the crank.
[0028] An exercise bicycle in accordance with the present invention
may have a shroud. The shroud may surround the crank, resistance
mechanism, and frame cross-bar. The shroud design may provide
styling for aesthetic appeal, while protecting the user from injury
associated with the rotational units contained therein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The foregoing and other objects and features of the present
invention will become more fully apparent from the following
description and appended claims, taken in conjunction with the
accompanying drawings. Understanding that these drawings depict
only typical embodiments of the invention and are, therefore, not
to be considered limiting of its scope, the invention will be
described with additional specificity and detail through use of the
accompanying drawings in which:
[0030] FIG. 1 is a perspective view of an exercise bicycle in
accordance with the invention, arranged in the classical
position;
[0031] FIG. 2 is a side elevation view of an exercise bike in
accordance with the present invention, arranged in the classical
position;
[0032] FIG. 3 is a perspective view of one embodiment of a post
lock for maintaining the seat and handlebar posts in the classical
position;
[0033] FIG. 4 is a side elevation view of an exercise bicycle in
accordance with the present invention, arranged in a semi-recumbent
position;
[0034] FIG. 5 is a side elevation view of one alternative
embodiment of an exercise bicycle in accordance with the present
invention in the classical position;
[0035] FIG. 6 is a side elevation view of an alternative embodiment
of an exercise bicycle in accordance with the present invention in
a semi-recumbent position;
[0036] FIG. 7 is a side elevation view of one embodiment or crank
and resistance mechanism;
[0037] FIG. 8 is a side elevation view of an alternative embodiment
of a crank and resistance mechanism;
[0038] FIG. 9 is a side elevation view of one presently preferred
embodiment of an exercise bicycle in accordance with the present
invention, arranged in the classical position; and
[0039] FIG. 10 is a side elevation view of one presently preferred
embodiment of an exercise bicycle in the semi-recumbent
position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0040] It will be readily understood that the components of the
present invention, as generally described and illustrated in the
Figures herein, could be arranged and designed in a wide variety of
different configurations. Thus, the following more detailed
description of selected embodiments of a system and method in
accordance with the present invention, as represented in FIGS. 1
through 10, is not intended to limit the scope of the invention, as
claimed, but is merely representative of certain presently
preferred embodiments for implementing the invention. The presently
preferred embodiments will be best understood by reference to the
Figures, wherein like parts are designated by like numerals
throughout.
[0041] Referring to FIGS. 1-2, an exercise bicycle 10 may be
configured to have a frame 12. The frame 12 may have longitudinal
11c, lateral 11b, and transverse 11c directions, substantially
orthogonal to one another. The frame 12 provides the necessary
strength, support, and stability needed for effective operation of
the exercise bicycle 10. The frame 12 may be constructed of metal,
a metal alloy, plastic, a polymer, a reinforced polymer, a
composite, or any other material with sufficient strength,
durability, and rigidity.
[0042] A crank 14 may rotatably attach to the frame 12. The crank
14 may be characterized by a crank axis 15 and a radial direction
17, the crank 14 being connected to the frame 12 to rotate about
the crank axis 15. The crank 14 provides a location for a user to
provide force over a range of motion, thus, providing exercise. The
crank 14 may be operably connected to a resistance mechanism 16.
The resistance mechanism 16 may be a circumferential friction belt,
an electromagnetic flywheel, a disk brake, a fluid dash pot, an air
fan, or any other suitable rotational resistor. With suitable
transfer mechanisms, the rotary motion may be converted to a
reciprocating motion.
[0043] The frame 12 of the exercise bicycle 10 may be configured to
have a longitudinally 11a extending cross-bar 18 extending in a
longitudinal direction. The cross-bar 18 may be configured to
provide a "backbone" for the exercise bicycle 10. Legs 20 may be
secured to the cross-bar 18 to provide transverse 11c spacing of
the cross-bar 18 from a supporting surface (e.g. floor). The legs
20 may be configured to have stabilizers 22 to provide a secure and
stable platform from which the exercise bicycle 10 may be operated.
The members 18, 20, and 22 of the frame 12 may be configured to
have any convenient cross section, providing strength, rigidity,
durability and other physical parameters.
[0044] A handlebar post 24 may be configured to extend
substantially transversely 11c from the crossbar 40. The handlebar
post of FIG. 1 is illustrated as a round tube. In reality, the
handlebar post 24 may have any convenient cross section (e.g.
square, rectangular, oval, etc.).
[0045] The handlebar post 24 may secure to the crossbar 18. In
certain embodiments, the handlebar post 24 may be pivotably
connected to the crossbar 18 in order to rotate between a classical
position and a semi-recumbent position. In one presently preferred
embodiment, the handlebar post 24 attaches to the crossbar 18
through a bearing 26. The bearing 26 provides smooth rotation of
the handlebar post 24 with respect to the crossbar 18 with minimum
wear.
[0046] The handlebar post 24 may be configured to provide for
adjustments in length. Such adjustment may allow the exercise
bicycle to conform to a variety of users. In one presently
preferred embodiment, the handlebar post 24 may have a base 28, an
extension 30, and a stem 32. The base 28 may be configured to
provide a housing for the bearing 26. The extension 30 may slide in
and out of the base 28 to provide lengthening or shortening of the
handlebar post 24. The extension 30 may be secured in relation to
the base by a frictional, or other type of clamp. Alternatively, a
member loaded in shear, such as a pin, may extend laterally through
the base 28 and extension 30, or another simple locking device may
be used.
[0047] The stem 32 may secure to the extension 30. Bicycle stems
may serve well for the intended purposes of the present invention.
The stem 32 provides a location for securing a handlebar 34. The
handlebar 34 provides a structure for supporting the arms and upper
body of a user while operating the exercise bicycle 10.
[0048] Many different handlebars and handlebar accessories may be
implemented. These handlebars may include mountain bicycle
handlebars, mountain bicycle handlebars with bar ends, drop
handlebars, aerodynamic handlebars, touring handlebars, and the
like. The handlebar 34 of the present invention may be configured
to integrate any handlebar style that may be employed on
conventional bicycles. The handlebar 34 may be configured to
contain a console 36 or panel 36 presenting switches, dials,
indicators, displays, controls and the like. The console 36 may be
operably connected to the resistance mechanism 16 for adjusting the
rotational resistance thereof. The console 36 may have a
computation device for calculating calories consumed, equivalent
miles traveled, resistance level, time of exercise, heart rate, or
other desirable information.
[0049] If desired, the stem 32 and handlebar 34 may be configured
in a manner not typical of current bicycle components. Different
configurations may be used to provide additional comfort and
utility for users with special physical needs and requirements.
[0050] A seat post 40 may be configured to extend from the crossbar
18 at an angle 41 with respect to the transverse axis 11c. The
angle 41 may correspond to the angle of the down-tube of typical
bicycles with respect to the vertical axis. Similar to the
handlebar post 24, the seat post 40 may have any suitable cross
section for structure and convenience.
[0051] The seat post 40 may secure to the crossbar 18. In certain
embodiments, the seat post 40 may be pivotably connected to the
crossbar 18 in order to rotate between a classical position and a
semi-recumbent position. In one presently preferred embodiment, the
seat post 40 attaches to the crossbar 18 by a bearing 42. The
bearing 42 provides smooth rotation of the seat post 40 with
respect to the crossbar 18 while minimizing wear.
[0052] The seat post 40 may be adjustable in length. Such
adjustment may allow the exercise bicycle to conform to a variety
of users. In one presently preferred embodiment, the seat post 40
may have a base 44, an extension 46, and an adapter 48. The base 44
may be configured to provide a housing for the bearing 42. The
extension 46 may telescope in and out of the base 44 to provide
lengthening or shortening of the seat post 40. The extension 46 may
be secured to the base 44 as discussed hereinabove.
[0053] The adaptor 48 may be secured to one end of the extension
46. The adaptor 48 may be configured to receive and secure a seat
stem 50. The seat stem 50 in turn, provides a location for securing
a bicycle seat 52. The seat stem 50 and bicycle seat 52 may be
selected from any one of a number of bicycle seat stems and seats
currently known. As discussed hereinbove, alternate configurations
may be used to provide more comfort and utility for users with
special physical needs, requirements, or desires.
[0054] In certain embodiments, a bar 54 may be configured to
connect the handlebar post 24 to the seat post 40. In one presently
preferred embodiment, the bar 54 is a two force member attaching to
the handlebar post 24 at a pivot 56 and attaching to the seat post
40 at a pivot 58.
[0055] The handlebar post 24, the seat post 40, or both may be
maintained in the classical position by a post lock 60. In one
presently preferred embodiment, the post lock is secured to the
base 44 of the seat post 40. The bar 54 may connect to the seat
post 40 to rigidly maintain the handlebar post 24 in the proper
position with respect to the seat post 40.
[0056] Referring to FIG. 3, the post lock 60 may have any
configuration that allows for a rigid securement of the post 24, 40
in the classical position. In one presently preferred embodiment,
the lock may have two outer flanges 62 attached to the base 44. A
corresponding inner flange 64 may attach to the crossbar 18. An
aperture (not shown) in the outer flanges 62 may admit a pin 66.
The pin 66 may have a knob 67 secured to one end.
[0057] When the knob 67 is pulled, a spring 68 may compress and the
pin 66 retract from the aperture in the outer flange 62a. With the
pin 66 retracted, the base 44 may pivot to the classical position.
The knob 67 may then be released and the pin 66 may pass through
the aperture 69 in the inner flange 64 and the aperture in the
outer flange 62b, thus locking the base 44 in position with respect
to the crossbar 18. The lock may be released by retracting the pin
66 and pivoting the base 44. The post lock 60 may be embodied in
other specific forms without departing from its essential
characteristics.
[0058] Referring to FIG. 4, when the post lock 60 is released, the
seat post 40 and the handlebar post 24 recline to the
semi-recumbent position as illustrated. The seat 52 and stem 50 may
be removed from the adapter 48. A chair-like seat 70 with a stem 71
may then be secured to the adapter 48. In one presently preferred
embodiment, the chair 70 may be configured with a seat 72 for
supporting the weight of a user and a back 74 for providing
longitudinal 11a support. The chair 70 may have stabilizing
handlebars 76 for aiding a user in balancing himself/herself.
Additionally, the stem 71, seat 72, and back 74 may tilt forward or
backward about a lateral axis 11b to provide a variety of seating
positions.
[0059] In certain embodiments, as discussed hereinabove, the seat
post 40 may be lengthened or shortened by the extension 46
telescoping in and out of the base 44. With the chair seat 70
installed, the seat post 40 may still be adjusted in a similar
manner, thus, accommodating differently sized users.
[0060] Referring to FIGS. 5-6, the seat post 40 need not pivot to
accomplish the objectives of the invention. In an alternative
embodiment, the base 44 may rigidly secure to the crossbar 18. The
extension 46 may be removed from the base 44, and the bar 54 may
detach at the pivot 56. With the seat post 40 and bar 54 removed,
the handlebar post 24 may pivot to provide the user with access to
controls 36 and readouts 36 while operating the bicycle from the
semi-recumbent position. A stop 3 8 may support the handlebar post
24 in the semi-recumbent position. If desired, the handlebar post
24, may lock in the semi-recumbent position.
[0061] In the alternate embodiment, the chair 70 may be configured
with a base 77. The base 77 may comprise a longitudinally extending
member 77a and a transversely extending member 77b. The
longitudinally extending member 77a may provide longitudinal
adjustment of the chair 70, while the transversely extending member
77b may provide transverse adjustment of the chair 70. The chair 70
may be configured to be removed from the frame 12. In an
alternative embodiment, however, the chair 70 may be permanently
secured to the frame 12.
[0062] Referring to FIGS. 7-8, the crank 14 may have an axle 78, a
sprocket 80, crank arms 82, and pedals 84. In one presently
preferred embodiment, the crossbar 18 may accommodate a typical
bicycle crank axle 78. The crank arms 82 and pedals 84 may also be
typical bicycle components. If desired, the pedals 84 may be
clipless. Clipless pedals 84 allow a user to pull as well as push
on a pedal 84, thus, allowing more muscles and muscle groups to be
exercised.
[0063] The crank 14 may be configured to transfer rotation to the
resistance mechanism 16 by a belt 86. The resistance mechanism 16
resists rotation of the belt 86, which resists rotation of the
crank 14 and subsequently increases the load that must applied by
the user to rotate the crank 14. The resistance mechanism 16 may
include a sprocket 88 to engage the belt 86. A support structure 90
may secure the resistance mechanism 16 to the crossbar 18.
[0064] The sprockets 80, 88 may be configured in any manner
suitable to transfer rotation therebetween. The sprockets 80, 88
may be replaced by gears that positively engage one another. In
such an embodiment, the belt 86 may be eliminated. The sprockets
80, 88 may also engage a chain 86.
[0065] The resistance mechanism 16 may be any one of a variety of
mechanisms. In certain embodiments the crank 14 and the resistance
mechanism 16 may be incorporated into a single unit. In such an
embodiment, the resistance mechanism 16 may apply a force to the
sprocket 80 to resist rotation. The actuation of the resistive
force may be applied axially by a caliper (similar to a disk brake)
or circumferentially (similar to a drum brake).
[0066] Referring to FIGS. 9-10, an exercise bicycle 10 in
accordance with the present invention may have post covers 92 and a
shroud 94. The covers 92 and shroud 94 may be designed to provide
aesthetic appeal as well as protect the user from the rotating
crank 14 and resistance mechanism 16. Additionally, the shroud 96
may have an aperture 96 to allow a user access to the knob 67 of
the post lock 60. The aperture 96 may have an arced configuration
to allow for the motion of the knob 67 as the seat post 40
reclines.
[0067] From the above discussion, it will be appreciated that the
present invention provides an exercise bicycle having both a
classical and a semi-recumbent exercise positions. The exercise
bicycle may be configured with typical bicycle components to
provide an accurate classical position for simulation of outdoor
cycling. Furthermore, the present invention provides an exercise
bicycle that may shift from the classical position to the
semi-recumbent with minimal user adjustment. Moreover, the
invention to provides an exercise bicycle that may be fully
adjustable in order to accommodate the stature of a variety of
users.
[0068] The present invention may be embodied in other specific
forms without departing from its spirit or essential
characteristics. The described embodiments are to be considered in
all respects only as illustrative, and not restrictive. The scope
of the invention is, therefore, indicated by the appended claims,
rather than by the foregoing description. All changes which come
within the meaning and range of equivalency of the claims are to be
embraced within their scope.
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