Exercise devices – Sit up device
Patent
1998-03-16
1999-07-13
Donnelly, Jerome
Exercise devices
Sit up device
482127, 482121, 482125, A63B 2302
Patent
active
059219041
ABSTRACT:
The invention is a portable exercise device which creates a controlled and infinitely variable resistance profile. The exercise device, creates this infinitely variable resistance using springs or elastic bands to create the input resistance versus the use of a weight stack as normally used in most exercise equipment. The advantage of this device over conventional exercise devices is that usage of this resistance medium creates a portable exercise device that can create an infinitely variable resistance profile. The exercise devise may be used while traveling and/or in the home. The ease with which the input resistance elements, such as elastic bands or springs, may be changed makes this device much more versatile for exercising a wider range of muscle groups while using one portable machine.
REFERENCES:
patent: 5224914 (1993-07-01), Friedman
patent: 5669861 (1997-09-01), Toups
patent: 5669862 (1997-09-01), Sayman
patent: 5759138 (1998-06-01), Boland
patent: 5772562 (1998-06-01), Stevens
patent: 5772563 (1998-06-01), Lin
patent: 5776042 (1998-07-01), Szabo
patent: 5779607 (1998-07-01), Harris
Donnelly Jerome
Vandigriff John E.
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