Abstract: An improved releasable coupling for a tube is disclosed. The coupling contains a socket with at least four stepped bores. Located within the first bore is a compresion means (such as a collar) which has an inner surface inclined to the axis of first bore. A collet is mounted within the compression means and is so configured that, when the collet is caused to move inwardly, the inclined surface of the compression means causes the jaws of the collet to move inwardly. The coupling also contains a tube support located within the second bore. At least four sealing means are disposed within the third bore: a first O-ring is contiguous with a first washer, which in turn is contiguous with a second O-ring, which in turn is contiguous with a second washer.

Abstract: An apparatus for cleaning fluid lines is disclosed. This apparatus contains a fluid manifold, a valve, and a line connecting said fluid manifold and said valve. The valve used in the apparatus contains at least two input ports, at least two output ports, means responsive to fluid pressure for closing off the flow of liquid from a first of said ports, and means responsive to fluid pressure for opening the flow of liquid from a second of said ports.

Abstract: Cocks comprising a spherical shut-off member seated on a gasket and formed of a body connected to elements of a canalization of fluid and wherein there is rotatably mounted a shut-off member having a surface in the form of a spherical zone which is capable of coming into contact with a gasket of generally annular shape secured in said body, wherein the shut-off member is extended at the side corresponding to the largest diameter of the surface of the spherical zone form by two lugs which extends parallel to the axis of the shut-off member passing through its center, one of said lugs being connected by a connection means having play to a manipulation member rotatably mounted in the body and the other lug having the shape of a fork the central recess of which is engaged on a stub integral with the body. The invention is also concerned with a method of mounting such cocks.