Impact absorption devices and valve structure
US3948499A · kind A · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7781
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An impact absorber, particularly for automobile fenders, comprising a cylinder, a piston on one end of a piston rod and slidable in the cylinder, an annular partition slidable on the piston rod, and a valve carried by the piston and allowing, on compression of the impact absorber, flow from the chamber beyond the piston to the annular chamber between the piston and the partition. The valve is biased in the closing direction by a spring and has a valve member with opposed differential areas which are exposed to the pressure in the said chamber and are selected to bias the valve in the opening direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.