Hydraulic damper
US4484669A · kind A · utility
18Cited by
3References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1982 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Apr 20, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7847
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic damper includes a cylinder, a piston working in the cylinder and partitioning the interior thereof into two liquid chambers, two valve discs provided respectively on opposite end surfaces of the piston, two sets of passages opening respectively in opposite end surfaces of the piston to cooperate with respective valve discs, and an orifice communicating permanently the two liquid chambers. A restricting member is provided to change the effective area of the orifice in response to the direction of the liquid flow passing through the orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.