Spring type exercise device

Claim 2

An exercise device comprising: first and second members longitudinally extensible and retractable relative to one another, one of said members being adapted for attachment to a fixed anchorage, and the other of said members being adapted for mounting upon an individual; and spring means characterized by a plurality of helical turns extending longitudinally relative to said first and second members and attached at one end to said first member, said second member including an adjuster portion adjustably disposable between selected turns of said helical turns thereby to adjust the bias developed upon extension of said first and second members, certain of said helical turns being progressively larger in diameter as they proceed in a direction away from the point of attachment of said spring means to said first member.

Claim 3

An exercise device according to claim 1 and including a third member surrounding said spring and having an end wall, certain of said helical turns being located between said end wall and said adjuster portion whereby said certain of said helical turns are subjected to compression upon extreme relative extension of said first and second members.

Claim 4

An exercise device according to claim 1 and including a third member surrounding said spring, and stop means on said third member and on said one of said first and second members adapted for attachment to a fixed anchorage, said stop means being engageable to prevent further extension upon attainment of a predetermined degree of relative extension between said first and second members.

Claim 5

An exercise device according to claim 1 wherein said adjuster portion comprises a helically directed element progressively movable along said turns upon rotation of said adjuster portion.

Claim 6

An exercise device according to claim 1 and including a third member engaged by the end of said spring opposite one end; and stop means on said first member and said third member engageable upon predetermined relative extension between said first and second members to limit further said extension.

Claim 7

An exercise device comprising: coupling means for coupling to an individual; first and second members longitudinally extensible and retractable relative to one another and rotatable relative to one another about their longitudinal axes, one of said first and second members being adapted for attachment to a fixed anchorage, and the other of said members being attached to said coupling means; and spring means characterized by a plurality of helical turns extending longitudinally relative to said first and second members and attached to one of said members, the other of said first and second members including a spring tension means adjuster means located between selected turns of said spring means and rotatable relative to said turns for screw-like travel of said adjuster means along the length of said spring means thereby to vary the number of said turns placed in tension upon extension of said first and second members relative to one another.

Claim 8

An exercise device comprising: coupling means for coupling to an individual; first and second members longitudinally extensible and retractable relative to one another and rotatable relative to one another about their longitudinal axes, one of said first and second members being adapted for attachment to a fixed anchorage, and the other of said members being attached to said coupling means; and spring means characterized by a plurality of helical turns extending longitudinally relative to said first and second members and attached to one of said members, the other of said first and second members including a spring tension means adjuster means located between selected turns of said spring means and rotatable relative to said turns for screw-like travel of said adjuster means along the length of said spring means thereby to vary the number of said turns placed in tension upon extension of said first and second members relative to one another.