Seal for gas spring
US5011121A · kind A · utility
12Cited by
31References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1987 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Apr 15, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/40
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gas spring having a cylinder, a piston within the cylinder and a piston rod projecting out of the cylinder. A seal between the rod and cylinder is formed by a cup-shaped member presenting an inwardly-projecting skirt that functions as a one-way check valve. A second or inner seal may be optionally placed within the cup-shaped member to form a lubricant-retaining chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.