Gas spring suitable as a lifting aid for hatchbacks or trunk lids of motor vehicles
US4156523A · kind A · utility
35Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1977 |
| Grant date | May 29, 1979 |
| Priority date | — |
| Expiry date | Nov 23, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/546
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gas spring suitable as a lifting means for a car hatchback includes a device to hold the gas spring piston rod in its extended position with the hatchback fully open. Such holding device comprises a pair of check valves associated with the guide piston of the gas spring whereby one such check valve is spring-biased closed so that a substantial closing force is required to initiate closing of the hatchback.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.