Valve assembly
Patent 4489914 Issued on December 25, 1984. Estimated Expiration Date: 
December 25, 2001. 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.
December 25, 2001. 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 428199 1295250 2697638 2988289 3017124 3030033 3219278 InventorsApplicationNo. 06/269728 filed on 06/02/1981US Classes:251/147, Pipe end (terminal valve)239/579, Movable terminal flow member controls valve239/587.1, TERMINAL MEMBER ADJUSTABLY OR SHIFTABLY CONNECTED TO FLOW CONDUIT251/353Reciprocating spoutExaminersPrimary: Chambers, A. MichaelAttorney, Agent or FirmInternational ClassesB05B 1/30 (20060101)F16L 37/28 (20060101) F16L 37/38 (20060101) F16K 1/00 (20060101) F16K 1/12 (20060101) AbstractThe valve assembly of the present invention is intended for use, within a section of pipe, to control the flow of a fluid within the pipe. The invention discloses an arrangement in which two sections of concentric pipe are slidable with respect to each other between a first position which allows fluid to flow along the pipe and a second position in which fluid flow is stopped. The outer section of pipe has a sealing plug supported in an annular position within its bore which either abuts the end of the inner section of pipe to close the valve or is separated from it to open the valve. | |
