초록 ▼

A single bolt coupling for the attachment to the end portion of a pipe having a circumferential groove or shoulder in such end portion includes a coupling which receives the end portion of the pipe therein and a circumferential open ended resilient ring associated with the coupling body which expand

A single bolt coupling for the attachment to the end portion of a pipe having a circumferential groove or shoulder in such end portion includes a coupling which receives the end portion of the pipe therein and a circumferential open ended resilient ring associated with the coupling body which expands to allow passage of the groove into or out of the coupling and contracts to hold the groove in the coupling. The coupling is provided with a screw vise mechanism to expand the ring so that a pipe end can easily be inserted into the coupling. After insertion, the ring is allowed to contract to hold the pipe in the coupling. The coupling with its ring can also couple plain ended pipes, the ring contracting tightly around the pipe to hold it in place by friction between the pipe and ring. The coupling may have a ring at both ends to similarly receive and hold two pipes in end-to-end relationship, or may have a different type of connector, such as threads, a flange, or a set of partially rotatable cammed jaw members at the other end, or a plain opening to make a bell type joint. The coupling may join pipes, act as an expansion joint, join various fittings to pipes, or may itself form various fittings such as valves.

대표청구항 ▼

[ I claim:] [1.] A single bolt coupling to connect an end portion of a pipe having a circumferential groove with an outer diameter, comprising;a coupling body having a receiving opening to closely receive therein the end portion of a pipe to which it is to be connected and to extend over the end por

[ I claim:] [1.] A single bolt coupling to connect an end portion of a pipe having a circumferential groove with an outer diameter, comprising;a coupling body having a receiving opening to closely receive therein the end portion of a pipe to which it is to be connected and to extend over the end portion of the pipe over the circumferential groove in the end portion of the pipe;an open ended ring in the receiving opening having a normal inside diameter less than the outer diameter of the groove where two ends of said ring are separated by dead ended counter walls of a set of two circumferentially partially movable jaws attached to the coupling body;means for the attachment of the circumferentially partially movable jaws to the coupling body; andmeans to drive the two circumferentially partially movable jaws in opposite directions to expand the ring to allow the end portion of the pipe to which it is to be connected to be received in the opening.