Expansible seal

Details Expansible seal Expansible seal

1987-10-13

1988-12-13

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277204, 277226, 277220, F16J 1546

Patent

active

047905441

ABSTRACT:
A seal in an aperture, e.g., a duct, is made by foaming a foamable substrate within an envelope in the aperture, to expand the envelope, which desirably has sealant or adhesive on its outer surface, to conform it into sealing engagement with the aperture. The envelope is closed and is of wraparound configuration so as to seal a large variety of aperture sizes, whether empty or containing objects, such as cables.

REFERENCES:
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patent: 2099722 (1937-11-01), Byers
patent: 2309658 (1943-02-01), Miller
patent: 2616736 (1952-11-01), Smith
patent: 2666962 (1954-01-01), Tripp
patent: 2816575 (1957-12-01), Stokes
patent: 2822192 (1958-02-01), Beatty
patent: 3038732 (1962-06-01), Scott et al.
patent: 3125346 (1964-03-01), Poltorak
patent: 3339011 (1967-08-01), Ewers et al.
patent: 3339931 (1967-09-01), Hundt et al.
patent: 3415287 (1968-12-01), Heslo et al.
patent: 3758916 (1973-09-01), Wetmore

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