Hydraulic cylinder for a physical exercise equipment
US5222580A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/10
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hydraulic cylinder for a physical exercise equipment includes a cylinder body, a piston rod which extends outward from the cylinder body and which has an annular groove that is formed circumferentially in an outer end portion of the piston rod, and a coupling mechanism which includes a flexible end sleeve and a cylindrical metal retaining element. The end sleeve has a pivot joint tubular portion and a tubular protrusion which projects radially from the pivot joint tubular portion. The tubular protrusion is formed with a receiving recess which receives the outer end portion of the piston rod therein. The pivot joint tubular portion has a pivot bore formed therethrough so that a pivot pin can extend therethrough. The cylindrical metal retaining element has a pressed diameter-reduced portion which is sleeved on and which presses against the tubular protrusion in such a manner that the tubular protrusion has a portion squeezed into the annular groove of the piston rod so as to retain the end sleeve on the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.