Hydraulic shock absorber
US4895229A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Dec 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/3484
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic shock absorber has a disk valve assembly which is formed by successively stacking up a first disk valve having arc-shaped or circumferentially extending opening provided therein at positions close to the inner periphery thereof, a second disk valve having notches which extend from the outer periphery thereof to the radially outer edges of the corresponding openings provided in the first disk valve, and a predetermined number of annular third disk valves. A respective such disk valve assembly is provided at the downstream end of each of the extension- and contraction-side passages which are formed in a piston. Thus, it is possible to obtain a higher level of damping force in a low piston speed region than in the case of a conventional valve mechanism that uses a fixed orifice, and damping characteristics can be set as desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.