Coupling device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 10, 1989
Issued Date -
N/A
app pub date -
Jan 25, 1988
filing date -
Feb 19, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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