Air suspension device for vehicle seat
US4946145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Aug 29, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F15/0275
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An air suspension device for a vehicle seat which is capable of automatic adjustment of the height of the seat at a given neutral position. In the device, an air spring is adjusted in flow of air thereinto or therefrom via a directional control valve which is actuated responsive to the vertical movements of link members, so as to adjust the height of the seat. A play is provided in the interlocking relation between the control valve and link members to avoid unnecessary actuation of the valve. Further, a manual control valve is disposed between an air source and the air spring, with a check or shuttle valve provided therein, thereby forming a direct air exhaust circuit, whereby operating the manual valve effects a rapid exhaust of air from the air spring, not via the directional control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.