Ball valve
Patent 4399977 Issued on August 23, 1983. Estimated Expiration Date: 
January 18, 2002. 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 18, 2002. 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 2839266 2963262 3570811 Rotary valve Valves Patent #: 4150811 InventorAssigneeApplicationNo. 06/340209 filed on 01/18/1982US Classes:251/315.13, Assembled around the head251/315.08, Including trunnion opposite axially extending actuating means251/315.16Ball constructionExaminersPrimary: Schwadron, Martin P.Assistant: Shay, James R. Attorney, Agent or FirmInternational ClassF16K 5/06 (20060101)AbstractA ball valve comprising a housing having inlet and outlet ports provided a fluid passageway therethrough, a rotatable closure member disposed within the housing and interposed between the inlet and outlet ports for providing alternate open and closed positions for the valve, a rotatable valve stem secured to the closure member for moving the closure member between the open and closed positions therefor, a valve seat removably secured to the housing and engagable by the closure member in the closed position thereof, and a removable sealing member provided for the valve seat to substantially preclude leakage of fluid around the closure member in the closed position of the valve.Field of SearchSeat or interface seal | |
