Shock absorber
US4917222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0777
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shock absorber comprises a tubular working cylinder (12) to be mounted on a suspended part of a vehicle, with a piston rod assembly (26) received slidably in the working cylinder (12) having an end (28) to be mounted on a fixed part of the vehicle. The piston rod assembly (26) has at its free end a piston member (40) cooperating with the working cylinder (12) to divide the interior thereof into an upper (52) and a lower working chamber (50), with a valve mechanism in the piston member (40) to permit controlled two-way flow between the upper and lower working chambers (52, 50). A mass (58) is mounted in the shock absorber and displaceable in response to a predetermined acceleration of the shock absorber from a first position in which the mass closes a passage (56, 54, 90) between the working chamber (52) and a reservoir (50; 22), and a second position in which the passage (56, 54, 90) is open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.