Flexible sheet exercising apparatus
US4199136A · kind A · utility
Inventor
Key dates
| Filing date | Jun 3, 1977 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Jun 3, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B5/08
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An exercising apparatus is similar in its mode of action to a trampoline, and uses a flexible semi-rigid and elongated sheet which may be made of plastic or metal. A frictional pad is provided to avoid slipping as the user bounces on the apparatus. The flexible sheet may be supported at both ends either by a structure which is secured to both ends of the elongated flexible sheet, or by supports upon which it rests. In order to accommodate both heavy and light persons, and persons who want more vigorous bouncing action than those who desire less bounce, the apparatus is provided with various arrangements for increasing or decreasing the deflection versus force characteristic. In one species of the invention the underside of the elongated flexible sheet is provided with a number of grooves for selectively engaging the underlying support either closer or farther away from the end of the sheet. In another embodiment two sheets of different flexibility are provided and the apparatus may be turned over to get greater or lesser flexibility. In another embodiment made of one piece of metal with the ends turned under, arrangements are provided for mechanically engaging the upper and lower p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.