WO2007112458A1 - Exercise device - Google Patents

Exercise device Download PDF

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Publication number
WO2007112458A1
WO2007112458A1 PCT/ZA2006/000043 ZA2006000043W WO2007112458A1 WO 2007112458 A1 WO2007112458 A1 WO 2007112458A1 ZA 2006000043 W ZA2006000043 W ZA 2006000043W WO 2007112458 A1 WO2007112458 A1 WO 2007112458A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulley
flywheel
load
drive
axle
Prior art date
Application number
PCT/ZA2006/000043
Other languages
French (fr)
Inventor
Michael Roydon Puzey
Original Assignee
Michael Roydon Puzey
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Michael Roydon Puzey filed Critical Michael Roydon Puzey
Priority to PCT/ZA2006/000043 priority Critical patent/WO2007112458A1/en
Publication of WO2007112458A1 publication Critical patent/WO2007112458A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/22—Resisting devices with rotary bodies
    • A63B21/225—Resisting devices with rotary bodies with flywheels
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/15—Arrangements for force transmissions
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/15—Arrangements for force transmissions
    • A63B21/151—Using flexible elements for reciprocating movements, e.g. ropes or chains
    • A63B21/154—Using flexible elements for reciprocating movements, e.g. ropes or chains using special pulley-assemblies
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/15—Arrangements for force transmissions
    • A63B21/157—Ratchet-wheel links; Overrunning clutches; One-way clutches
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0002—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0002—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms
    • A63B22/0005—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms with particular movement of the arms provided by handles moving otherwise than pivoting about a horizontal axis parallel to the body-symmetrical-plane
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/005—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters
    • A63B21/0051—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters using eddy currents induced in moved elements, e.g. by permanent magnets
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/012—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters
    • A63B21/015—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using frictional force-resisters including rotating or oscillating elements rubbing against fixed elements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0002—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms
    • A63B22/0007—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms by alternatively exercising arms or legs, e.g. with a single set of support elements driven either by the upper or the lower limbs
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/02—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with movable endless bands, e.g. treadmills
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
    • A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
    • A63B22/0664—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing an elliptic movement
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/06—Training appliances or apparatus for special sports for rowing or sculling

Definitions

  • This invention relates to a resistance device which is of compact construction and which can be used in a variety of applications e.g. in an energy storage mechanism, or in an exercise machine such as a treadmill, exercise cycle, elliptical- type machine, or a fly-wheel based system, and wherein, according to requirement, the exercise machine can be actuated by a user's hands and arms, or legs.
  • the invention provides a resistance device which includes a load-resisting member which is mounted for rotation about a first axis, a drive member which is mounted for rotation about the first axis, at least a first actuator for rotating the drive member, and a drive transfer arrangement for translating rotational drive from the drive member into rotational drive of the load-resisting member, and wherein the rotational speed of the load-resisting member is greater than the rotational speed of the drive member.
  • the first actuator may take on any suitable form but, preferably, is in the nature of a crank.
  • the resistance device includes a second actuator and the first and second actuators are located, respectively, on opposed sides of the load-resisting member.
  • each actuator is a crank the cranks are preferably angularly displaced at 180° relatively to each other.
  • the load-resisting member may be mounted on an axle and it may be freely rotatable about the axle. In other words the load-resisting member is not necessarily fixed to the axle.
  • Each actuator may be directly fixed to the axle.
  • the drive member may be mounted to the axle and it may be fixed to the axle.
  • the drive transfer arrangement may be of any appropriate type and preferably includes a shaft which is parallel to the first axis, a first pulley which is driven by means of a belt, chain or similar device from the drive member and which is mounted to the shaft on a first side of the load-resisting member, the first pulley being of a smaller diameter than the diameter of the drive member, a second pulley which is positioned on a second side of the load-resisting member, remote from the first side, the second pulley being fixed to the shaft, a third pulley which is fixed to the load-resisting member and which is on the second side of the load-resisting member, the third pulley being smaller in diameter than the second pulley and being rotatable in at least a first direction about the first axis, in unison with the load-resisting member, and a belt, chain or similar device for driving the third pulley from the second pulley.
  • the third pulley may be fixed to the load-resisting member via a one-way drive device, such as a one-way clutch or bearing so that rotational drive in a first direction is transferred from the pulley to the load-resisting member.
  • a one-way drive device such as a one-way clutch or bearing so that rotational drive in a first direction is transferred from the pulley to the load-resisting member.
  • the action of the one-way drive device is such that drive is not transferred from the load- resisting member to the third pulley.
  • Pulley is used herein in a generic sense and includes a pulley, cog, roller or similar rotational drive or driven device.
  • the load-resisting member may of any appropriate kind and preferably is in the nature of a flywheel.
  • the flywheel may be braked in any appropriate way to provide a yielding load-resisting force which acts against free rotation of the flywheel.
  • FIG. 10 The accompanying drawing illustrates, in exploded form, a resistance device 10 according to the invention. Only those components which are necessary for an understanding of the working of the invention are illustrated. It is to be understood that other components such as a housing, safety guard or the like have been omitted for clarity of illustration.
  • the device 10 includes an axle 12 which is positioned on a first axis 14.
  • a load-resisting device in the form of a flywheel 16 is mounted for free rotation on the axle.
  • the axle 12 on a first side 18 has a number of flat surfaces 20.
  • a drive member 22, in the nature of a ribbed pulley, is fitted over an end of the axle which protrudes on the first side and is fixed thereto so that the pulley and the axle are rotatable in unison.
  • the actuator includes a lever 28 which terminates in a handle 30 which is rotatable about a stub axle 32.
  • a support frame member 34 is used to support the protruding end of the axle and to shield the actuator 24 from the drive member 22.
  • a shaft 40 located on a second axis 41 which is spaced from and which is parallel to the axis 14, is mounted, at one end, to a bearing, not shown, which is engaged with the support frame member 34.
  • a first pulley 42 is fixed to the shaft so that it is rotatable together with the shaft.
  • the pulley has a smaller diameter than the drive member 22.
  • a ribbed belt 46 which passes over a jockey wheel 48 is used for transferring rotational movement from the drive member 22 to the first pulley 42.
  • a second pulley 60 which is larger in diameter than the first pulley 42, is mounted to one end of the shaft 40 on a second side 62 of the flywheel 16.
  • a ribbed belt 64 is engaged with the second pulley and is used for transferring rotational movement from the second pulley to a third pulley 70 which is fixed to the flywheel.
  • the third pulley 70 is smaller in diameter than the second pulley.
  • the axle 12 protrudes from the flywheel and the third pulley 70, on the second side 62. This protruding end of the axle is similar to the protruding end on the first side of the flywheel and carries flat formations 2OA which are similar to the flat surfaces 20.
  • a crank actuator 80 is engageable with the flat formations 2OA.
  • the actuator 80 is offset, in an angular sense, by 180° with respect to the actuator 24.
  • the actuators are however linked and when one actuator is rotated in a first direction about the axis 14 the other actuator is rotated in the same direction and at the same rate.
  • the device 10 is designed to be actuated by hand.
  • the flywheel 16 may be frictionally braked using a belt or similar device, which is engaged with a periphery of the flywheel, using techniques which are known in the art.
  • a magnetic brake of a kind which is known in the art, is used for inhibiting free rotation of the flywheel, according to requirement.
  • the magnetic brake typically includes one or more magnets 90 which are fixed to the flywheel and which are rotated, together with the flywheel, passed ferro-magnetic components in which electromagnetic fields are induced which restrain flywheel rotation. This kind of brake is readily adjustable to exert a greater or lesser braking force on the flywheel.
  • the rotational speed of the first pulley is greater than the rotational speed of the member 22.
  • the second pulley has a larger diameter than the first pulley and thus, although it moves at the same rotational speed as the first pulley, its peripheral speed is greater.
  • the third pulley which is of smaller diameter than the second pulley, is rotated at an increased rotational speed.
  • the third pulley as noted, is fixed to the flywheel and the flywheel therefore rotates at a substantially increased speed relatively to the rotational speed of the actuators 24 and 80.
  • the construction illustrated is of a compact nature and is highly effective in offering load-resisting movement of the flywheel when the actuators are employed.
  • Each handle 30, in this example, is designed to be used by hand, but, through suitable shaping, may readily act as a pedal so that the device may be hand or foot operated, according to requirement.
  • the resistance device can be incorporated in various forms in exercise machines such as treadmills, elliptical trainers, cycles, rowing-type machines, and the like. Also, the resistance device can be used as an energy storage mechanism, with rotational energy stored primarily in the flywheel.
  • a one-way clutch or bearing 84 can be used between the flywheel 16 and the third pulley 70 so that the rotational drive is transferred in a first direction only from the pulley to the flywheel. Rotational movement will not however be transferred from the flywheel to the pulley.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A resistance device for an exercise machine which includes a flywheel which is mounted for rotation about an axis and two actuators, on opposed sides of the flywheel, which are mounted for rotation in unison about the axis and which are directly coupled to the flywheel.

Description

EXERCISE DEVICE
BACKGROUND OF THE INVENTION
[0001] This invention relates to a resistance device which is of compact construction and which can be used in a variety of applications e.g. in an energy storage mechanism, or in an exercise machine such as a treadmill, exercise cycle, elliptical- type machine, or a fly-wheel based system, and wherein, according to requirement, the exercise machine can be actuated by a user's hands and arms, or legs.
SUMMARY OF INVENTION
[0002] The invention provides a resistance device which includes a load-resisting member which is mounted for rotation about a first axis, a drive member which is mounted for rotation about the first axis, at least a first actuator for rotating the drive member, and a drive transfer arrangement for translating rotational drive from the drive member into rotational drive of the load-resisting member, and wherein the rotational speed of the load-resisting member is greater than the rotational speed of the drive member.
[0003] The first actuator may take on any suitable form but, preferably, is in the nature of a crank.
[0004] Preferably the resistance device includes a second actuator and the first and second actuators are located, respectively, on opposed sides of the load-resisting member. In the case in which each actuator is a crank the cranks are preferably angularly displaced at 180° relatively to each other. [0005] The load-resisting member may be mounted on an axle and it may be freely rotatable about the axle. In other words the load-resisting member is not necessarily fixed to the axle. Each actuator may be directly fixed to the axle.
[0006] The drive member may be mounted to the axle and it may be fixed to the axle.
[0007] The drive transfer arrangement may be of any appropriate type and preferably includes a shaft which is parallel to the first axis, a first pulley which is driven by means of a belt, chain or similar device from the drive member and which is mounted to the shaft on a first side of the load-resisting member, the first pulley being of a smaller diameter than the diameter of the drive member, a second pulley which is positioned on a second side of the load-resisting member, remote from the first side, the second pulley being fixed to the shaft, a third pulley which is fixed to the load-resisting member and which is on the second side of the load-resisting member, the third pulley being smaller in diameter than the second pulley and being rotatable in at least a first direction about the first axis, in unison with the load-resisting member, and a belt, chain or similar device for driving the third pulley from the second pulley.
[0008] The third pulley may be fixed to the load-resisting member via a one-way drive device, such as a one-way clutch or bearing so that rotational drive in a first direction is transferred from the pulley to the load-resisting member. However the action of the one-way drive device is such that drive is not transferred from the load- resisting member to the third pulley. [0009] "Pulley" is used herein in a generic sense and includes a pulley, cog, roller or similar rotational drive or driven device.
[0010] The load-resisting member may of any appropriate kind and preferably is in the nature of a flywheel. The flywheel may be braked in any appropriate way to provide a yielding load-resisting force which acts against free rotation of the flywheel.
In this regard use may be made of a belt or similar friction device which acts against movement of the flywheel, a magnetic brake, or any equivalent device. The invention is not limited in this regard.
BRIEF DESCRIPTION OF THE DRAWING
[0011] The invention is further described by way of example with reference to the accompanying drawing which illustrates, in exploded form, a resistance device according to one form of the invention.
DESCRIPTION OF PREFERRED EMBODIMENT
[0012] The accompanying drawing illustrates, in exploded form, a resistance device 10 according to the invention. Only those components which are necessary for an understanding of the working of the invention are illustrated. It is to be understood that other components such as a housing, safety guard or the like have been omitted for clarity of illustration.
[0013] The device 10 includes an axle 12 which is positioned on a first axis 14. A load-resisting device in the form of a flywheel 16 is mounted for free rotation on the axle. Thus the flywheel is not rotatable together with the axle but is rotatable about the axle. [0014] The axle 12, on a first side 18, has a number of flat surfaces 20. A drive member 22, in the nature of a ribbed pulley, is fitted over an end of the axle which protrudes on the first side and is fixed thereto so that the pulley and the axle are rotatable in unison.
[0015] A cranked actuator 24 with a hole 26 which is complementary to the end of the axle with the flat surfaces 20, is engaged with the flat surfaces in a non- releasable manner. The actuator includes a lever 28 which terminates in a handle 30 which is rotatable about a stub axle 32.
[0016] A support frame member 34 is used to support the protruding end of the axle and to shield the actuator 24 from the drive member 22.
[0017] A shaft 40, located on a second axis 41 which is spaced from and which is parallel to the axis 14, is mounted, at one end, to a bearing, not shown, which is engaged with the support frame member 34. A first pulley 42 is fixed to the shaft so that it is rotatable together with the shaft. The pulley has a smaller diameter than the drive member 22. A ribbed belt 46 which passes over a jockey wheel 48 is used for transferring rotational movement from the drive member 22 to the first pulley 42.
[0018] A second pulley 60, which is larger in diameter than the first pulley 42, is mounted to one end of the shaft 40 on a second side 62 of the flywheel 16. A ribbed belt 64 is engaged with the second pulley and is used for transferring rotational movement from the second pulley to a third pulley 70 which is fixed to the flywheel.
The third pulley 70 is smaller in diameter than the second pulley. The axle 12 protrudes from the flywheel and the third pulley 70, on the second side 62. This protruding end of the axle is similar to the protruding end on the first side of the flywheel and carries flat formations 2OA which are similar to the flat surfaces 20. A crank actuator 80 is engageable with the flat formations 2OA.
[0019] In this example the actuator 80 is offset, in an angular sense, by 180° with respect to the actuator 24. The actuators are however linked and when one actuator is rotated in a first direction about the axis 14 the other actuator is rotated in the same direction and at the same rate.
[0020] In the illustrated example the device 10 is designed to be actuated by hand. The flywheel 16 may be frictionally braked using a belt or similar device, which is engaged with a periphery of the flywheel, using techniques which are known in the art. Preferably however a magnetic brake, of a kind which is known in the art, is used for inhibiting free rotation of the flywheel, according to requirement. The magnetic brake typically includes one or more magnets 90 which are fixed to the flywheel and which are rotated, together with the flywheel, passed ferro-magnetic components in which electromagnetic fields are induced which restrain flywheel rotation. This kind of brake is readily adjustable to exert a greater or lesser braking force on the flywheel.
[0021] If the axle 12 is rotated, by operating one or both of the actuators 24 and 80, then the drive member 22 is rotated in the same direction. Rotational drive is then
transferred to the shaft 40. As the drive member 22 is larger in diameter than the first pulley the rotational speed of the first pulley is greater than the rotational speed of the member 22. The second pulley has a larger diameter than the first pulley and thus, although it moves at the same rotational speed as the first pulley, its peripheral speed is greater. This means that the third pulley, which is of smaller diameter than the second pulley, is rotated at an increased rotational speed. The third pulley, as noted, is fixed to the flywheel and the flywheel therefore rotates at a substantially increased speed relatively to the rotational speed of the actuators 24 and 80.
[0022] The construction illustrated is of a compact nature and is highly effective in offering load-resisting movement of the flywheel when the actuators are employed.
[0023] Each handle 30, in this example, is designed to be used by hand, but, through suitable shaping, may readily act as a pedal so that the device may be hand or foot operated, according to requirement.
[0024] The resistance device can be incorporated in various forms in exercise machines such as treadmills, elliptical trainers, cycles, rowing-type machines, and the like. Also, the resistance device can be used as an energy storage mechanism, with rotational energy stored primarily in the flywheel.
[0025] A one-way clutch or bearing 84 can be used between the flywheel 16 and the third pulley 70 so that the rotational drive is transferred in a first direction only from the pulley to the flywheel. Rotational movement will not however be transferred from the flywheel to the pulley.

Claims

1. A resistance device which includes a load-resisting member which is mounted for rotation about a first axis, a drive member which is mounted for rotation about the first axis, at least a first actuator for rotating the drive member, and a drive transfer arrangement for translating rotational drive from the drive member into rotational drive of the load resisting member, and wherein the rotational speed of the load-resisting member is greater than the rotational speed of the drive member.
2. A resistance device according to claim 1 wherein the drive transfer arrangement includes a shaft which is parallel to the first axis, a first pulley which is driven from the drive member and which is mounted to the shaft on a first side of the load-resisting member, a second pulley which is positioned on a second side of the load-resisting member, remote from the first side, the second pulley being fixed to the shaft, and a third pulley which is fixed to the load-resisting member and which is rotatable in at least a first direction about the first axis, in unison with the load-resisting member.
3. A resistance device according to claim 1 wherein the load-resisting member is a flywheel.
4. A resistance device according to claim 3 which includes a braking mechanism which is operable to vary a force which acts against rotation of the flywheel.
5. A resistance device according to claim 1 wherein the first actuator is on a first side of the load-resisting member and which includes a second actuator for rotating the drive member on a second side of the load-resisting member which is opposed to the first side.
6. A resistance device according to claim 1 which includes an axle, on the first axis, to which the drive member is fixed.
7. A resistance device according to claim 2 wherein the first pulley has a smaller diameter than the drive member, and the third pulley has a smaller diameter than the second pulley.
8. A resistance device according to claim 2 which includes a one-way drive device which connects the third pulley to the load-resisting member.
9. A resistance device which include an axle, a flywheel which is mounted for rotation about the axle, a drive pulley which is fixed to the axle on a first side of the flywheel, a shaft which is spaced from, and which is parallel to, the axle, a first pulley, fixed to the shaft, which is driven from the drive member, a second pulley which is fixed to the shaft, a third pulley on a second side of the flywheel for rotation about the axle, which is connected to the flywheel and is driven from the second pulley, and at least one actuator for rotating the axle.
10. A resistance device for an exercise machine which includes a flywheel which is mounted for rotation about an axis and two actuators, on opposed sides of the flywheel, which are mounted for rotation in unison about the axis and which are directly coupled to the flywheel.
PCT/ZA2006/000043 2006-03-28 2006-03-28 Exercise device WO2007112458A1 (en)

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Application Number Priority Date Filing Date Title
PCT/ZA2006/000043 WO2007112458A1 (en) 2006-03-28 2006-03-28 Exercise device

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Application Number Priority Date Filing Date Title
PCT/ZA2006/000043 WO2007112458A1 (en) 2006-03-28 2006-03-28 Exercise device

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602781A (en) * 1983-03-23 1986-07-29 Allegheny International Exercise Co. Dual action exercise cycle
US4705493A (en) * 1986-09-08 1987-11-10 Shinn Fu Corporation Transmission mechanism for gymnastic bicycle
US20020142889A1 (en) * 2001-03-28 2002-10-03 Mu-Chuan Wu Transmitting device for a walking machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602781A (en) * 1983-03-23 1986-07-29 Allegheny International Exercise Co. Dual action exercise cycle
US4705493A (en) * 1986-09-08 1987-11-10 Shinn Fu Corporation Transmission mechanism for gymnastic bicycle
US20020142889A1 (en) * 2001-03-28 2002-10-03 Mu-Chuan Wu Transmitting device for a walking machine

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