Multi-tube shock absorber
US5070970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/3482
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic damper for a suspension system comprises a fluid-filled inner cylinder mounting a reciprocating piston and piston rod. The piston divides the interior of the inner cylinder into upper and lower chambers. A reservoir tube surrounds the inner cylinder and forms a reservoir in the interior volume between the reservoir tube and the inner cylinder. A base valve assembly permits the return of fluid into the lower chamber from the reservoir. A pair of concentric tubes are mounted between the inner cylinder and the reservoir tube and provide a one-way laminar flow path for fluid exiting the upper chamber of the inner cylinder and entering the reservoir. The length and the spacing of the concentric tubes can be varied to provide a preselected damping force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.