Gas spring
US4948104A · kind A · utility
29Cited by
15References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/365
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
According to an illustrative example of the invention, a gas spring comprises adjacent one end of the cylinder two axially spaced sealing rings, namely an axially inner and an axially outer sealing ring. A lubricant chamber is defined axially between the axially inner and the axially outer sealing rings. The axially inner sealing ring is pressure-resistant against the elevated gas pressure within the working chamber such as to maintain the pressure of gas within the working chamber at a level exceeding the pressure within the lubricant chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.