Device for preventing leakage at pipe joints

Details Device for preventing leakage at pipe joints Device for preventing leakage at pipe joints

1980-03-21

1982-08-31

Callaghan, Thomas F.

Pipe joints or couplings

With fluid pressure seal

Expansible internal sleeve-type gasket

138 97, 285370, 285DIG16, 285110, F16L 2100

Patent

active

043469221

ABSTRACT:
This device comprises a cylindrical member integrally made of an elastic material for covering the inside periphery of a pipe joint, belt members impregnated with a bonding agent to be squeezed out by pressure, and circular expanding members for expanding said cylindrical member when positioned inside the cylindrical member and subsequently expanded. The respective belt members are wound around the outside peripheral surface of the cylindrical member at its longitudinal ends and the respective expanding members are brought into contact with the inside peripheral surface of the cylindrical member at both its longitudinal ends, so that by radially expanding the cylindrical member at both its longitudinal ends by the respective expanding members, the respective belt members are pressed against the inside peripheral portions of the pipes on both sides of the joint for squeezing out the bonding agent from the belt members by such pressure and thereby attaining an airtight and watertight bonding between the outside peripheral surface of the cylindrical member at both its longitudinal ends and the inside peripheral surfaces of the pipes.

REFERENCES:
patent: 2014313 (1935-09-01), Damsel
patent: 2977994 (1961-04-01), Xenis
patent: 3070130 (1962-12-01), Risley
patent: 3508766 (1970-04-01), Kessler et al.
patent: 3704564 (1972-12-01), Koga
patent: 4194750 (1980-03-01), Sovish et al.

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