| 摘要 |
<p>In a sealing arrangement for a rotary fluid pressure control valve, such as a power steering control valve, a resilient sealing ring is located in a ring groove for sealing engagement with an outer cylindrical member. Frictional losses and a tendency for the sealing assembly to jam are reduced by equalization of the fluid pressure on opposite faces of the sealing ring. This is achieved by virtue of a tapered ring cross-sectional profile and other ring profiles disclosed herein, or by provision of a relieved zone in the ring groove for transmission of fluid pressure.</p> |
