| 摘要 |
<p>An air controlled valve assembly for a lumbar support device of the type having a plurality of parallel, horizontally disposed air bags located in the seat back of an automobile seat includes a hollow housing having a main air distribution chamber therein and a plurality of individual air supply chambers each of which is adapted to be connected to a respective air bag. A check valve is associated with each individual air supply chamber to control the flow of air under pressure from the main air distribution chamber to the respective air bags. The check valve is adapted to be spring biased into normally closed position against a valve seat and a spring guide member is interposed between the spring and the check valve. The spring guide member is formed with a plurality of radially extending circumferentially spaced apart projections, each of which has a partial circumferential surface adapted to be in sliding engagement with a hollow cylindrical bore. The partial cylindrical surface of each projection has a groove formed therein for retaining a supply of high viscosity oil to dampen the oscillating movement of the spring guide member and check valve due to rapid fluctuations in the air supply.</p> |
