Patent ID: 8122907
Filing Date: 2012-02-28
Classification: F16K,Y10T

Abstract:
1. A valve arrangement comprising: an inlet conduit defining an inlet passage adapted for communication with a supply of a pressurized motive fluid; a first planar surface spaced radially from the inlet conduit; first and second supply passages communicating through the first planar surface; a rotary valve including a second planar surface abutting against the first planar surface and a valve passage communicating through the second planar surface, the rotary valve being rotatable to place the inlet passage in communication with a selected one of the first and second supply passages through the valve passage, and adapted to conduct the pressurized motive fluid from the inlet passage to the selected one of the first and second supply passages; wherein the rotary valve includes a counter bore, a biasing surface defined between a primary bore and the counter bore, a seal between the inlet conduit and the counter bore, a biasing chamber defined between the seal and the biasing surface and at least one biasing passage communicating between the inlet passage and the biasing chamber to expose the biasing surface to pressure from the pressurized motive fluid; a housing surrounding the inlet conduit and rotary valve; and a valve actuator extending through the housing and movable with respect to the housing to actuate the rotary valve.