Precision pressure control valve
Patent 4203465 Issued on May 20, 1980. Estimated Expiration Date: 
March 27, 1999. 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.
March 27, 1999. 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 References 1744290 3232091 3433254 InventorAssigneeApplicationNo. 06/024409 filed on 03/27/1979US Classes:137/487.5, Electrically actuated valve137/505.16, Liquid transfer137/510Flexible diaphragm or bellows reactorExaminersPrimary: Weakley, Harold W.Attorney, Agent or FirmInternational ClassF02M 65/00 (20060101)AbstractA diaphragm controlled pressure regulator has a control trim fluid pressure applied to the side of the diaphragm opposite to the side thereof in contact with the fluid, the pressure of which is to be regulated, whereby the normal regulator gain value of the regulator is substantially reduced so that the regulated pressure can be maintained substantially constant. | |
