Inflatable seal

Details Inflatable seal Inflatable seal

1979-12-26

1981-10-13

Byers, Jr., Nile C.

Bridges

Gangway, ramp, or dock leveler

Attached

49477, 52 2, 114263, E01D 100

Patent

active

042939690

ABSTRACT:
An inflatable seal for use in an adjustable dockboard unit for sealing the unit against the flow of air therethrough into and/or out of the building in which the dockboard is being used.

REFERENCES:
patent: 2924336 (1961-03-01), Kelley
patent: 3117332 (1964-01-01), Kelley
patent: 3137017 (1964-06-01), Pfleger
patent: 3359687 (1967-12-01), Wallace
patent: 3584324 (1971-06-01), Merrick
patent: 3840930 (1974-10-01), Waddell
patent: 4010505 (1977-03-01), Bouman
patent: 4020607 (1977-05-01), Bjervig
patent: 4075787 (1978-02-01), Krahe
patent: 4126909 (1978-11-01), Smith
patent: 4156989 (1979-06-01), Sparrow

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