Spring-type exercise device
US4775149A · kind A · utility
Inventor
Key dates
| Filing date | May 1, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B21/022
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An elongated shaft includes a spring anchoring point at each end and in the center. A pair of sleeves are slidably positioned on the shaft, one between the central anchoring point and each end anchoring point. Each sleeve is joined to the anchor point on either side thereof by a coil spring. Each coil spring is identical in length and tension strength, and is formed from steel wire of a selected gauge. The coil spring tension strength of all the springs on the bar is modified by varying the width distance between each coil turn in a selected segment or segments of each spring. In use, each spring may be compressed toward or extended away from the associated anchor point, depending upon the particular exercise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.