Pipe joints or couplings – With fluid pressure seal – Expansible internal sleeve-type gasket
Patent
1991-01-22
1992-03-03
Arola, Dave W.
Pipe joints or couplings
With fluid pressure seal
Expansible internal sleeve-type gasket
285370, 285915, F16L 2102
Patent
active
050926330
ABSTRACT:
An internal expansion coupling member for use in joining a pair of aligned tubular members in end-to-end relationship, where said tubular members are characterized by an essentially uniform diameter and are adapted to transmit a medium under pressure. The coupling member comprises an internal expansion coupling device formed of an elongated open ended tubular joint member consisting of a relatively rigid sheet-like member, where the sheet ends overlap such that the end portions lie essentially contiguous with each other. Preferably a compressive seal member is provided between the end portions. About the circumference of the joint member, means, such as an annular groove, is provided to position and retain an O-ring type member thereabout. At least one compressible and flexible O-ring type member, formed of a high temperature resistant material, is secured thereabout by said means. Finally, means for expanding the sheet-like member, whereby the sheet ends may be caused to move circumferentially towards one another to compress the seal member and to urge said O-ring type member against the inside wall of the tubular member, is provided to effect a pressure seal therebetween. In a preferred embodiment, a thrust restraint member, to prevent separation of the coupling member from the tubular member under conditions of high internal pressure, may be incorporated into the system of this invention.
REFERENCES:
patent: 4478434 (1984-10-01), Little
patent: 4606558 (1986-08-01), Davidson
patent: 4913465 (1990-04-01), Abbema et al.
patent: 4927189 (1990-05-01), Burkit
patent: 4927189 (1990-05-01), Burkit
patent: 4997212 (1991-03-01), Burkit
patent: 5002317 (1991-03-01), Burkit
patent: 5015015 (1991-05-01), Fetters
European Search Report dated Aug. 20, 1991.
Arola Dave W.
Noll William B.
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