Leak resistant plug assembly

Details Leak resistant plug assembly Leak resistant plug assembly

F - Mech Eng,Light,Heat,Weapons

16

L

189/11

F16L 55/12 (2006.01)

Patent

CA 1211056

ABSTRACT A plug assembly which is resistant to loosening in response to thermal expansion and contraction is provided. The plug assembly comprises a deformable sleeve which is closed at one end and open at its opposite end to provide a chamber which receives a wedge slidable with respect to an expandable ring mounted in the chamber adjacent its open end. When pulled axially, the wedge expands the ring which, in turn, expands the sleeve radially outward into engagement with the inner wall of the item to be plugged. A retainer surrounds the out-pulled wedge and cooperates with a nut and threads on the wedge to tension the same and thereby apply continuous outward pressure to the sleeve. Preferably, the outer periphery of the sleeve is provided with a series of alternating edges and grooves which cut through any scale which may be present on the inner surface of the plugged item.

449384

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