Sit-up exercise apparatus

Details Sit-up exercise apparatus Sit-up exercise apparatus

1996-04-03

1997-01-07

Donnelly, Jerome

Exercise devices

Sit up device

482132, 482142, A63B 2302

Patent

active

055911110

ABSTRACT:
A sit-up exercise apparatus includes a substantially inverted-U shaped handle bar and a support bar provided with a head rest firmly secured to the side arms of the handle bar. A shaft is provided at each end of the handle bar and is fitted with a roller having a sector-like slot, a spring capable of rotation with the shaft and the roller, and a bolt for limiting rotation of the shaft and roller. Each roller is also tightly fitted with a cover. The rollers are capable of rearward or forward rotation with the forward push or rearward pull of the handle bar to a suitable extent. By means of the springs and the bolts, rotation of the rollers as well as the forward displacement of the handle bar may be controlled, achieving an excellent exercise apparatus which is safe and comfortable to operate.

REFERENCES:
patent: 2722967 (1955-11-01), Reinholz
patent: 5447483 (1995-09-01), Liang
patent: 5492520 (1996-02-01), Brown

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