Oleo-pneumatic damper
US4082255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1977 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jan 13, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oleo-pneumatic damper comprises a hollow rod slidable within a cylinder, and a low-pressure gas chamber defined within the cylinder adjacent to a first variable volume of hydraulic fluid, which volume is essentially provided in the hollow rod. A second variable volume of hydraulic fluid in the rod is separated from the first fluid volume by a valve device, and a separating piston separates the second fluid volume from a high-pressure gas chamber, also in the hollow rod. A spring in the first fluid volume urges the hollow rod into the cylinder, thereby to form an anti-threshold spring to reduce the threshold or minimum loading on the damper, at which the damper will commence a compression stroke movement for damping purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.