Patent ID: 9709182
Date: 2017-07-18
CPC Classifications: F16K,Y10T

Claim:
1. A pressure relief valve comprising: a valve body having an inlet and an outlet and defining a first fluid path fluidly connecting the inlet and the outlet of the valve, the valve body defining a valve seat; a valve member axially moveable between a first position and a second position for sealing against the valve seat, the valve member configured to close the first fluid path in the first position and thereby restrict flow between the inlet and the outlet, the valve member configured to open the fluid path in the second position and thereby allow flow between the inlet and the outlet; a biasing element configured to bias the valve member in the first position; and a frictional resistance means for preventing the pressure relief valve from oscillating, the frictional resistance means being resiliently biased laterally against an axially extending surface of the valve member to provide frictional resistance to movement of the valve member and thereby cause hysteresis in axial movement of the valve member between the first position and the second position, wherein the frictional resistance means has an inner diameter that is greater than a diameter of the valve seat.