Hydraulic shock absorber
US4934669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jul 7, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/16
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hydraulic shock absorber including an elongated body, closed at first and second opposite ends thereof, the elongated body containing a quantity of liquid. A piston is mounted for axial movement within the body and has longitudinally extending holes therein causing communication between first and second opposite chambers defined, respectively, in the body between the piston and the first and second ends of the body. The piston is able to be activated, in one direction, by a thrust rod extending axially within the first chamber of the body and is pushed, in the other direction, by a compression spring lodged in the second chamber of the body. The shock absorber further includes an internal coaxial bushing affixed to the second end of the body, extending over one part of the length of the body, in the direction of the first end of the body, and in which the piston is lodged freely sliding, the second chamber being defined in the bushing between the piston and the second end of the body. A deformable tubular membrane is further provided which includes a first part engaged with the bushing, so as to be tightly held between the bushing and the body, and a second part extending freely …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.