Sit-up exercise apparatus
US4468022A · kind A · utility
Inventor
Key dates
| Filing date | Jul 8, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Jul 8, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B23/0211
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A sit-up exercise apparatus having a structure that can be secured to the bottom of a door which comprises, means for restraining feet of an exerciser when performing a sit-up exercise, support means for supporting the foot restraining means at a height above the base of the structure, and screw means for releasably but rigidly securing the foot restraining means to the support means. The support means is substantially an elongated plate member extending from the structure and having, one end thereof downwardly extending to releasably but rigidly be affixed to the structure and another end thereof successively bent into a form resembling stair steps which accomplish height adjustment of the foot restraining means so as to accomodate different size feet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.