Structure of abdomen exerciser
US5300005A · kind A · utility
38Cited by
10References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1993 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Feb 25, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2208/0233
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An abdomen exerciser includes two three-end links respectively pivoted to two curved supports on a base frame at opposite sides to hold two leg presses, two sets of weights, and a back cushion. The sets of weights automatically turn the three-end links on the curved supports in lifting the back cushion from a horizontal position to a vertical position as the player bends the trunk upwards, or give a pressure to the player's back as the player lies down. Either leg press can be turned into the operative position for hanging the respective leg in raising the player's center of gravity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.