Abstract: A valve mechanism for installation in a pipe line for controlling the movement of a flowable material therein that comprises a central body section with end sections connected thereto and forming therewith a valve stopper chamber, the end sections each having an associated annular extension projecting into the valve stopper chamber and having an external sealing surface and an internal fluid-flow passage extending outwardly therefrom; a valve stopper in the chamber having a flow passage extending therethrough and sealing surfaces bounding the flow passage; a structure for moving the stopper to a valve open position substantially aligning the stopper flow passage with the extension flow passages, and to a valve closed position with the stopper sealing surfaces extending beyond the annular inner face of the extension; an annular gasket encircling each end section extension and thrust structure operable to compress the gaskets against the sealing surfaces of the extensions and stopper when the stopper is in valv

Abstract: A valve mechanism for installation in a pipe line for controlling the movement of a flowable material therein which comprises a central body section with end sections connected thereto and forming therewith a valve stopper chamber, the end sections each having an associated annular projection extending into the valve stopper chamber with fluid-flow passages extending outwardly therefrom; a valve stopper in the chamber having a flow passage extending therethrough and sealing surfaces bounding the flow passage; a structure for moving the stopper to a valve open position substantially aligning the stopper flow passage with the end section flow passages, and to a valve closed position blocking the end section flow passages; and a gasket encircling each end section projection and thrust structure operable to press the gaskets against the stopper sealing surfaces when the stopper is in valve open and valve closed positions.

Abstract: A coupling for joining two pipe sections, having end terminals, comprises:(a) a collar forming a through opening and having bore surfaces bounding said opening to closely receive a pipe section so that the collar is movable axially of the pipe section into coupling position spanning a joint formed by said end terminals,(b) the collar having associated well means communicating with said surfaces and extending outwardly thereof for reception of flowable cement,(c) and means to pressurize said cement supplied to said well means to cause flow of the cement between said surfaces and said pipe sections to bond the collar to the sections and to seal off therebetween.

Abstract: A coupling for joining two pipe sections having elongated outer surfaces and end terminals, comprises:(a) a tubular extension fitted endwise between the pipe terminals to form joints therewith,(b) first and second collars telescopically movable axially of the tubular extension into coupling positions spanning the respective joints,(c) one collar having an axially elongated bore and counterbore, one of which has elongated slideable engagement with the outer surface of one end of the extension, and the other of which has elongated slideable engagement with the elongated outer surface of one pipe section,(d) the other collar having an axially elongated bore and counterbore, one of which has elongated slideable engagement with the outer surface of the other end of the extension, and the other of which has elongated slideable engagement with the elongated outer surface of the other pipe section,(e) and liquid bonding agent between the collar and said pipe sections and said extension to bond the collars to the exte