Double sleeve pipe coupler

Details Double sleeve pipe coupler Double sleeve pipe coupler

1976-08-02

1977-10-11

Shedd, Wayne L.

Joints and connections

Member deformed in situ

Deformation occurs simultaneously with action of separate,...

403285, 285177, 2853824, 285398, 29506, 61 53, 403282, B25G 328

Patent

active

040532470

ABSTRACT:
The specification discloses a double sleeve coupler for coupling coaxially juxtaposed plain end steel pipe sections or pipe pile in metal-to-metal leakproof contact and at the same time providing a high strength connection under tension. A number of forms of couplers are disclosed, all essentially having two rigid metallic cylindrical sleeves of different diameter arranged coaxially one within the other with an annular space or socket therebetween at each end into which the wall of the plain end pipe or pipe pile may be driven as by hammering or by a pile driving hammer. The annular space between the sleeves expands radially outwardly in diameter toward the center of the coupler to a larger cylindrical diameter adjacent the center of the coupler. The length of the expanded inner section of the socket exceeds the thickness of the annular space forming the socket. Thus, as the pipe or pipe pile is hammered or driven into the coupler, the wall of the pipe or pipe pile is expanded over the inner sleeve to a larger diameter section of substantial length to form a metal-to-metal seal therewith. The expanded diameter section of the pipe or pipe pile reacts with the outer sleeve to restrain the separating movement of the pipe or pipe pile sections from the coupler when placed under tension. In the case of pipe pile, a central wall separating the annular spaces at opposite ends of the coupler provides a drive ring via which one section of expanded pipe pile may coaxially drive another section of pipe pile.

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