Patent ID: 6116281
Filing Date: 2000-09-12
Classification: F16K,Y10T

Abstract:
A control device for controlling the flow of liquids in a hydraulic system, said device comprising:a) a housing defining a fluid retaining cavity, said housing having a first fluid opening into said cavity;b) a flexible diaphragm extending across said cavity, said housing having a first fluid opening into said cavity;c) a valve seat formed in said housing adjacent and surrounding said first fluid opening;d) a valve member formed with said diaphragm as a part thereof for cooperative engagement with said valve seat to thereby form a valve; ande) a fluid retaining volume defined by a surface of said housing wall excluding said valve seat and a surface area of said diaphragm, excluding said valve member; said diaphragm surface area being substantially entirely opposed to said housing wall surface area whereby upon movement of said diaphragm to bring said valve member into a closed seating position on said valve seat, fluid retained within said retaining volume completely fills said retaining volume so that a force against said diaphragm is directly transmitted by said fluid to said housing to thereby cushion said diaphragm against damage throughout said surface area.