Diaphragm valve
Patent 4070004 Issued on January 24, 1978. Estimated Expiration Date: 
January 24, 1995. 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.
January 24, 1995. 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 2654559 3140615 3477693 3747479 3850900 3918495 InventorAssigneeApplicationNo. 05/662345 filed on 03/01/1976US Classes:251/331, Diaphragm251/368MaterialsExaminersPrimary: Rosenthal, ArnoldAttorney, Agent or FirmAbstractAn improved diaphragm valve, particularly adapted for applications at high pressures and in applications in which low dead volume is required. The valve has a diaphragm which is formed of a halogenated hydrocarbon polymer of a compression strength sufficient to avoid non-recoverable extrusion of the diaphragm. Use of such a valve totally avoids the work-hardening problem encountered in use of valves using metal diaphragms. | |
