Shock absorber for a suspension element of a heavy vehicle
US4768628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Feb 6, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2228/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shock absorber having a hollow slide slidably mounted in a fixed member disposed in a sleeve inside the body, separated from the latter by an annular gap and having an opening which communicates with a conduit opening into an a hydraulic chamber. The fixed member is mounted with clearance in the sleeve and is provided with radial ports communicating with the interior of the slide which is biased against the fixed member by an elastic return member bearing on the body. The slide is arranged in such manner as to be capable of occupying alternately a first position, in which it closes any communication between the annular gap and the interior of the slide when the suspension element is subjected to a low frequency oscillation less than .sqroot.2 times its frequency of resonance, and a second position in which it establishes a communication between its interior volume and the annular gap between the sleeve and the body when the suspension element is subjected to an oscillation frequency greater than its frequency of resonance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.