Hydropneumatic shock absorber
US3993294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/362
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydropneumatic shock absorber for use between a bumper and the chassis of a motor vehicle has a cylinder and a plunger guided in the cylinder by the radially enlarged inner end portion of the plunger and by an annular sealing assembly which axially bound a gap radially defined by respective walls of the cylinder and plunger. The sealing assembly includes a rigid guide ring axially secured on the plunger, a resilient sealing ring, and a backing ring of intermediate hardness axially interposed between the guide ring and the sealing ring. The hollow interior of the plunger is partly filled with a compressed gas and partly by liquid which also occupies the cylinder chamber outwardly closed by the plunger, a throttling passage in a closing disc which is an end wall of the plunger, and the remainder of the hollow plunger interior, the liquid being separated from the compressed gas by a floating partition in the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.