Coupling device

Details Coupling device Coupling device

1988-01-25

1989-10-10

Arola, Dave W.

Pipe joints or couplings

Temperature responsive joint element; e.g., shrunk fit

Memory plastic element

285369, 2853827, 285422, 285423, F16L 1908

Patent

active

048727130

ABSTRACT:
A device for coupling to an object such as a pipe, particularly for joining pipes together, comprising a tubular sleeve of which at least one end portion has a wall that is weakened to facilitate radial deformation, a shape memory alloy driver having a portion of the sleeve other than the weakened portion positioned in the direction of its recovery, and a collar of a dimensionally heat-recoverable polymeric material having at least part of the weakened portion of the sleeve positioned in the direction of its recovery.
Tensile strength or a seal or both between the sleeve and the object is provided by the shape memory alloy driver which deforms the sleeve into sealing contact with the pipes. Relief from transverse strain imposed on the joint between the pipes and the device is provided by the weakened portion of the sleeve which is supported by the collar.

REFERENCES:
patent: 418752 (1890-01-01), Rogers
patent: 3174851 (1965-03-01), Buehler et al.
patent: 3351463 (1967-11-01), Rozner et al.
patent: 3513429 (1970-05-01), Helsop
patent: 3753700 (1973-08-01), Harrison et al.
patent: 3783037 (1974-01-01), Brook et al.
patent: 4144104 (1979-03-01), Brooks
patent: 4314718 (1982-02-01), Broyles et al.
patent: 4424991 (1984-01-01), Hill et al.
patent: 4469357 (1984-09-01), Martin

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