Time delay device for a gas spring
US5076404A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an arrangement for a gas spring (1). This comprises a cylinder (2) with a piston (3) capable of being displaced axially therein, which marks the boundary of an inner space (4) of the cylinder (2) filled with a compressible gas-oil mixture. The space (4) varies in volume in accordance with a force (F) acting upon a piston rod connected to the piston. The invention is characterized in that the inner space is so arranged as to communicate via an openable and closable valve (13) with a closed space (10). The arrangement includes a control device (12) for actuating the valve (13), which control device is so arranged as to close the valve (13) once the piston (3) has moved past a predetermined axial position in the cylinder (2), and as to open it at a predetermined time after the moment of closing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.