Substantially constant-force exercise machine
First Claim
1. A resistance module configured for an exercise machine for providing a substantially constant force through a range of motion, comprising:
- at least one cantilever spring and at least one rigid member movable with respect to one another along a path of travel with the at least one rigid member causing the at least one cantilever spring to deflect and produce a resistance force as the at least one cantilever spring and the at least one rigid member move with respect to one another along the path of travel;
the cantilever spring having an anchored end and a deflection end;
the at least one rigid member engaging the deflection end of the cantilever spring, and constraining the deflection end to a predetermined path of deflection as the at least one cantilever spring and the at least one rigid member move with respect to one another;
means for operatively coupling at least one of the cantilever spring and the at least one rigid member to an exercise machine; and
an active element engageable by a user and operatively coupled to the resistance module.
1 Assignment
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Accused Products
Abstract
A resistance module for an exercise machine for providing a substantially constant force through a range of motion includes at least one cantilever spring and at least one rigid member movable with respect to one another along a path of travel. The rigid member causes the cantilever spring to deflect and produce a resistance force. The cantilever spring has an anchored end and a deflection end. The rigid member engages the deflection end of the cantilever spring, and constrains the deflection end to a predetermined path of deflection as the cantilever spring and the rigid member move with respect to one another. The rigid member can be a non-planer contact surface along which the deflection end tracks, or a pivot link. The module can include means for operatively coupling at least one of the cantilever spring and the at least one rigid member to an exercise machine.
37 Citations
42 Claims
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1. A resistance module configured for an exercise machine for providing a substantially constant force through a range of motion, comprising:
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at least one cantilever spring and at least one rigid member movable with respect to one another along a path of travel with the at least one rigid member causing the at least one cantilever spring to deflect and produce a resistance force as the at least one cantilever spring and the at least one rigid member move with respect to one another along the path of travel; the cantilever spring having an anchored end and a deflection end; the at least one rigid member engaging the deflection end of the cantilever spring, and constraining the deflection end to a predetermined path of deflection as the at least one cantilever spring and the at least one rigid member move with respect to one another; means for operatively coupling at least one of the cantilever spring and the at least one rigid member to an exercise machine; and an active element engageable by a user and operatively coupled to the resistance module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A resistance module configured for an exercise machine for providing a substantially constant force through a range of motion, comprising:
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at least one cantilever spring and at least one rigid member, each being operatively restrained by at least one guide rail along a substantially linear path of travel with respect to one another; the at least one rigid member causing the at least one cantilever spring to deflect and produce a resistance force as the at least one cantilever spring and the at least one rigid member move with respect to one another along the linear path of travel; the cantilever spring having an anchored end and a deflection end; the at least one rigid member engaging the deflection end of the cantilever spring, and constraining the deflection end to a predetermined path of deflection as the at least one cantilever spring and the at least one rigid member move with respect to one another; and an active element engageable by a user and operatively coupled to the resistance module. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A resistance module configured for an exercise machine for providing a substantially constant force through a range of motion, comprising:
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a pair of opposing crossheads moveable with respect to each other along a path of travel; at least one guide rail along which at least one of the pair of opposing crossheads moves along the path of travel; at least one rigid member, associated with one of the pair of opposing crossheads; at least one cantilever spring, associated with another of the pair of opposing crossheads and engagable with the at least one rigid member as the pair of opposing crossheads move with respect to one another, the cantilever spring providing a substantially constant compressive resistance force between the crossheads in response to relative movement of the crossheads along the path of travel; and an active element engageable by a user and operatively coupled to the resistance module. - View Dependent Claims (30, 31, 32, 33)
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34. A method for providing a substantially constant force through a range of motion for exercising, comprising the steps of:
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pulling an active member of an exercise machine through the range of motion; deflecting a deflection end of at least one cantilever spring through a path of deflection in response to pulling of the active member to produce a resistance force and displacing at least one of the cantilever spring and a rigid member relative to each other in a substantially linear path of travel in response to pulling of the active member; separating the resistance force produced by the at least one cantilever spring into i) a first component that is substantially constant through the path of deflection, and ii) a second component that is substantially non-constant through the path of deflection; and operatively coupling only the first component of the resistance force produced by the at least one cantilever spring to the active member of the exercise machine. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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Specification