Piston assembly for a hydraulic cylinder
US5222429A · kind A · utility
5Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | May 11, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The fluid seals on the currently available piston assemblies are ineffective for blocking the leakage of electrical signals between the piston and the cylinder. The present invention utilizes an electrically conductive split ring seated in an annular groove in a piston and an electrically conductive annular spring disposed between the split ring and the piston to resiliently urge the split ring into conductive engagement with the hydraulic cylinder while providing continuous electrical contact between the split ring and the piston to block the leakage of electrical signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.