Patent ID: 6032922
Filing Date: 2000-03-07
Classification: F16K,Y10T

Abstract:
A valve for controlling fluid flow through a housing having a passage, the fluid flow control valve comprising:a valve seat having an inlet side and an outlet side, the valve seat adapted to be positioned inside the housing for defining an opening in the passage which is smaller than the passage;a valve seal which is larger than the valve seat opening, the valve seal positioned against the inlet side of the valve seat in a closed position of the valve for closing off fluid communication between the inlet side and the outlet side of the valve seat;a solid push rod having an inlet end, an outlet end and a shoulder between the ends, the inlet end of the push rod slidably received in an opening in the valve seal so that the push rod moves independently of the valve seal and the outlet end of the push rod extending from the valve seal through the opening defined by the valve seat, the push rod substantially reduced in size intermediate the shoulder and the outlet end to permit maximum fluid flow around the push rod and through the passage;biasing means adapted to be disposed in the housing to operatively engage a portion of the push rod and seal, the biasing means providing counteracting forces in the closed position of the valve so that the shoulder on the push rod is moved to a position spaced from the valve seal when the valve is in the closed position, the shoulder engaging the valve seal when the push rod is moved in a direction toward the inlet side of the valve seat against the force of the biasing means for moving the valve seal off the seat to open the valve; andmeans for restricting movement of the valve seal to substantially axial movement relative to the valve seat.