Patent ID: 7156123
Filing Date: 2007-01-02
Classification: F16K,F16L,Y10T

Abstract:
1. A valve comprising: a rotatable valve element threadably engaging a valve body; the valve body defining a central passageway in fluid connection with an inlet, an outlet and a vent, and further defining a valve seat; the rotatable valve element having: a shoulder and a partially threaded neck extending from the valve element to threadably engage the valve body, the un-threaded portion of the neck forming a large o-ring channel; the neck forming a lip and a protruding tongue with a small o-ring channel form between the lip and the tongue; a large o-ring sized to fit in the large o-ring channel and a small o-ring sized to fit in the small o-ring channel, the large o-ring having a width greater than the small o-ring; a vent passageway in fluid communication with a inlet vent positioned in the neck between the lip and the large o-ring and an outlet vent opposite the neck; the small o-ring being in contact with the valve seat when the valve is closed, allowing fluid to flow from the valve inlet, through the central passageway to the valve outlet; and the small o-ring being out of contact with the valve seat when the valve is opened allowing fluid to flow from the valve inlet, through the central passageway, to the valve vent, across the small o-ring and into the inlet vent, the vent passageway and out the outlet vent.