Patent ID: 9599243
Date: 2017-03-21
CPC Classifications: F16K

Claim:
1. A pressure relief valve comprising: a housing having an inlet port, an outlet port and a curvilinearly extending interior sidewall to define a flow passageway through the housing from the inlet port to the outlet port; and a piston assembly moveable between a closed position to establish a fluid-tight seal between the inlet port and the outlet port along the flow passageway and an open position to permit fluidic flow of pressurized fluid from the inlet port to the outlet port along the fluid passageway, the piston assembly comprising a piston head having a parabolically shaped piston face and an elliptical perimeter that, when moved to the open position, aligns with the housing interior sidewall to provide a continuous transition from a position immediately upstream of the piston to a position immediately downstream of the piston.