Patent ID: 8127786
Filing Date: 2012-03-06
Classification: F16H,F16K,Y10T

Abstract:
1. A selector valve for selecting between two pressure sources to be delivered to a downstream use comprising: a valve housing; a piston movable within a bore in said valve housing; a first supply line for communicating a primary supply into a first chamber; a second supply line to communicate a secondary supply into a second chamber, and a window to communicate to a line leading to a downstream use for the supply; said piston being operable to move between a first position at which it connects said first chamber to said window, and blocks communication between said second chamber to said window, a second position at which it connects said second chamber to said window and blocks communication between said first chamber to said window, and a third position which is intermediate said first and second positions, and which connects both of said first and second chambers to said window, said valve moving through said third position as it moves between said first and second positions; and said second chamber communicating to a bypass line when said piston is in said first position.