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US 4,230,313 AGranted
Exercise device
OwnerThomas M. Chupp, Jr.inventor
Life of this patent
Estimating the term…
Abstract
An exercise device for use in performing "sit-up" exercises comprises a base member for placement under a door, side members for embracing either side of the door, and a foot rest extending from one of the side members. The user's feet can be hooked under the foot rest to hold them in place during sit-ups.
Claims2
An exercise device comprising:
- a frame comprising a bottom frame and a vertically extending side frame contiguous at its base with a first edge of said bottom frame;
- a horizontal bar;
- bar-supporting members connected to said vertically extending side frame and supporting said horizontal bar;
- and
- self-tightening clamping means for securing said frame to a door;
- said clamping means comprises:
- a second side frame hinged at its base with a second edge of said bottom frame and biased towards said first side frame by means of a bias spring connected between said second side frame and said bottom frame so as to define a door-receiving space between said first side frame and the upper edge of said second side frame.
4 more elements
Dependencies are inferred from the claim text.