Pipe joints or couplings – Variable length – With bellows seal
Patent
1993-02-08
1994-04-05
Nicholson, Eric K.
Pipe joints or couplings
Variable length
With bellows seal
285227, 285301, F16L 2702
Patent
active
052998410
ABSTRACT:
An expansion joint for coupling two conduits in a manner allowing relative axial movement therebetween and including an external shell or housing receiving the ends of both conduits and receiving an end of at least one of the conduits in a manner allowing relative axial movement of the end of the conduit in the shell, a flexible metal bellows in the shell connected to the shell and to the end of the one conduit for allowing relative axial movement between the ends of the conduits and for providing a fluid seal between the interiors of the conduits and the end of the expansion joint which receives the one conduit, and characterized by a safety flow restrictor operatively associated with the shell and with the one conduit for restricting fluid flow out the end of the expansion joint which receives the one conduit in the event the bellows fails to maintain the afore-mentioned fluid seal. The safety flow restrictor comprises a member surrounding the other conduit in close-fitting axially movable relation and a retainer defining an axial region holding the member against axial movement relative to the shell and allowing limited movement of the member in directions substantially perpendicular to the longitudinal axes of the other conduit and the shell. The safety flow restrictor can be incorporated in a single expansion joint wherein one conduit is fixed to the external shell or housing and the other conduit is movable therein and it can be incorporated in a double expansion joint including two conduits having ends thereof axially movable within a common external shell or housing.
REFERENCES:
patent: 1213906 (1917-01-01), Ray
patent: 1873703 (1932-08-01), Giesler
patent: 1968715 (1934-07-01), Slade
patent: 1992612 (1935-02-01), Hall
patent: 2044430 (1936-06-01), Hall
patent: 2911238 (1959-11-01), Myers et al.
Adsco Manufacturing Corp.
Nicholson Eric K.
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