Plastic control valve
Patent 5002086 Issued on March 26, 1991. Estimated Expiration Date: 
May 11, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 11, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 522269 filed on 05/11/1990US Classes:137/312, WITH LEAKAGE OR DRIP COLLECTING92/98R, Entire periphery secured to rigid working chamber forming wall251/61.4, Coaxial spring biasing means between valve and actuator251/61.5, Actuator wall between valve and coaxial spring biasing means251/214, Particularly packed or sealed251/322, Spring stop on valve stem251/323, Spring abuts valve stem guide251/335.2, Diaphragm251/367SectionalExaminersPrimary: Walton, George L.Attorney, Agent or FirmForeign Patent References
International ClassesF16K 031/26F16K 031/44 AbstractA free draining, corrosive resistent valve for regulating the flow of corrosive fluids therethrough includes a plastic valve housing. An inlet passage extends into the housing and upwardly therein terminating in a valve seat. An inclined panel surrounds the inlet passage below the valve seat. An outlet passage extends from the lower most portion of the inclined panel through the housing. A plastic valve poppet is located above the seat having a diaphragm therearound with an upwardly extending stem. A plastic retainer is located above the diaphragm into which the stem extends. The retainer is adapted for affixing the diaphragm is a sealing relationship to the valve housing.Other References
Field of SearchCoaxial spring biasing means between valve and actuatorActuator wall between valve and coaxial spring biasing means Diaphragm Diaphragm Bodies Sectional Particularly packed or sealed Spring stop on valve stem Spring abuts valve stem guide WITH LEAKAGE OR DRIP COLLECTING WITH REMOVAL CONDUIT FOR LIQUID SEEPAGE FROM EXPANSIBLE CHAMBER | |
