Shock absorber having fluid amplified piston head with relief valve which provides second stage of fluid amplification
US4867286A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1984 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Jan 25, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F5/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shock absorber having a casing containing compressible fluid and a piston head with structure for providing fluid amplification during normal piston head movement, the piston head having a central bore therein for slidably mounting the piston head for axial movement on the piston rod and being biased against a holding member by Bellville washers, a valve on the holding member obstructing conduits between the piston rod and the piston head when the piston head is biased against the holding member, the conduits being uncovered by the valve to permit flow therethrough from one side of the piston head to the other when the pressure in the shock absorber in the area of the holding member exceeds a predetermined value, the conduits between the piston head and piston rod being of a shape to provide a second stage of fluid amplified flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.