Hydraulic exerciser
US5236407A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2225/30
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hydraulic exerciser includes a base and a pair of driven units which are mounted pivotably on the base. A rigid tubular connector is secured on the base and extends between the driven units. The tubular connector has two ends which are provided with an annular peripheral groove and a fluid hole that is formed in the peripheral groove. Each of a pair of hydraulic cylinders includes a cylinder body, a piston movably disposed inside the cylinder body, a piston rod connected to the piston and having one end which extends out of the cylinder body and which is mounted pivotably to a respective one of the driven units, and a plug which is secured on one end of the cylinder body and which mounts pivotably the cylinder body on a respective one of the two ends of the tubular connector. The piston, the cylinder body and the plug cooperatively define a volume variable fluid chamber which is filled with hydraulic fluid. The plug is formed with a fluid hole that is aligned with the peripheral groove so as to communicate the fluid chamber and the interior of the tubular connector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.