Sit-up exercise apparatus
US5591111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2208/0252
- WIPO fieldFurniture, games
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.