Pipe joints or couplings – With fluid pressure seal – Flexible lip
Patent
1982-06-01
1985-04-30
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
Flexible lip
285369, 285383, F16L 1702
Patent
active
045139962
ABSTRACT:
A tube coupling for coupling together one tube to another tube which have predetermined interior and exterior diameters comprises an outer sleeve which has an interior bore with a sealing element lining the bore of an elastic material. The sealing element has an exterior positively engaged sleeve and for this purpose advantageously includes exterior radially extending ribs which engage into dovetail radially extending grooves of the outer sleeve. The sealing element lining the bore of the tube is of an elastic material and it is formed substantially symmetrically in respect to its radial mid plane and includes at each end a plurality of inwardly directed sets of sealing protuberances following each other with cavities adjacent these protuberances into which the protuberances can be deflected by the engaged tube. In addition, the sealing element includes a central separating flange between the sets of protuberances which define an interior radially inwardly extending flange having an interior diameter substantially equal to the diameter of the associated tube to be connected. The flange forms an end wall at each end which provides a stop for each end of the tube to be connected. The axial length of the flange is a multiple of its radial height and the sealing element advantageously includes at least one substantially annular cavity defined therein in the vicinity of the flange to permit the material of the flange to be taken up by the cavity upon inward stressing by the coupled tubes.
REFERENCES:
patent: 1515613 (1924-11-01), Phillips
patent: 2259940 (1941-10-01), Nathan
patent: 2615741 (1952-10-01), Nathan
patent: 2726103 (1955-12-01), Slattery
patent: 3177015 (1965-04-01), Brown
patent: 3430989 (1969-03-01), Wendt
patent: 4174125 (1979-11-01), Wyss
patent: 4319775 (1982-03-01), Bennett
Callaghan Thomas F.
Hobas-Engineering AG
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