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US 4,729,560 AGranted
Pivotal exercise handles having spring resistance
OwnerMyung H. Choinventor
Life of this patent
Estimating the term…
Abstract
A handle for a skipping rope having a hand-grip structure which is provided with a fixed or rotatable thumb-grip to be engaged by the user's thumb. The handle is formed of two handle membrs which are biased apart by a spring. The handle members can be closed or diverged by displacing the position of an axial ring. The skipping rope is attached to one of the handle members by a supporter device. Electronic counting systems are also provided to count either the number of times the hand-grip is compressed or the number of revolutions made by a skipping rope by using a single electronic counter.
Claims5
A skipping rope handle comprising:
- a first handle member being substantially semicircular in cross-section and having a first end, a gripping portion, and a second end;
- a second handle member being substantially semicircular in cross-section and having a first end, a gripping portion, and a second end;
- a hinge structure, said hinge structure including
- a hinge pin for pivotally connecting said first end of said first handle member to said first end of said second handle member,
- a cylindrical helical spring having upper and lower ends positioned within longitudinally extending first and second recessed portions within facing surfaces of said first and second handle members, wherein said cylindrical helical spring is selectively laid down and hidden from view within said first and second recessed portions,
- said first recessed portion has located therein a cavity deep in the side thereof for rotatably securing said upper end of said cylindrical helical spring,
- said second recessed portion has located therein a stria for inserting and slidably retaining said lower end of said cylindrical helical spring,
- said second recessed portion further includes means for stably positioning a lower portion of said cylindrical helical spring when said spring stands upwardly said handle members biased apart by said helical spring when in the standing position for exercise purposes;
- supporting means inluding a ring member being mounted relative to said second end of said second handle member and a supporter being rotatably secured in a recess of said ring member for attaching a jump rope to said second handle member;
- and
- retaining means in the shape of a ring axially displaceable along said first and second handle members for selectively retaining said handle members together, said retaining means being mounted in a concavity adjcent to said second end of said second handle member wherein, upon actuation, said biased handle members are selectively retained to form said skipping rope handle of a substantially circular cross-section.
8 more elements
A hand grip comprising:
- a first handle member being substantially semicircular in cross-section and having a first end, a gripping portion, and a second end;
- a hinge structure, said hinge structure including
- a hinge pin for pivotally connecting said first end of said first handle member,
- a cylindrical helical spring having upper and lower ends positioned within longitudinally extending first and second recessed portions within facing surfaces of said first and second handle members, wherein said cylindrical helical spring is selectively laid down and hidden from view within said first and second recessed portions,
- said first recessed portion has located therein a cavity deep in the side thereof for rotatably securing said upper end of said cylindrical helical spring,
- said second recessed portion has located therein a stria for inserting and slidably retaining said lower end of said cylindrical helical spring, and
- said second recessed portion further includes means for stably positioning a lower portion of said cylindrical helical spring when said spring stands upwardly said handle members biased apart by said helical spring when in the standing position for exercise purposes;
- retaining means in the shape of a ring axially displaceable along said first and second handle members for selectively retaining said handle members together, said retaining means being mounted in a concavity adjacent to said second end of said second handle member wherein, upon actuation, said biased handle members are selectively retained to form said handle grip of a substantially circular cross-section;
- a rotatable thumb-grip;
- said rotatable thumb-grip fits into a slot formed adjcent said second end of said first handle member by means of a protrusion projecting from a flat portion of said rotatable thumb-grip wherein said protrusion of said rotatable thumb-grip is retained in said slot by means of a pin passing through an opening insaid protrusion;
- said inner surface of said second handle member further includes means formed therein for receiving said flat portion of said rotatable thumb-grip upon closing said first and second handle members together.
8 more elements
Dependencies are inferred from the claim text.