Dust-tight hatch closure assembly

Fluent material handling – with receiver or receiver coacting mea – Filling means with receiver or receiver coacting means – Extensible or expansible inserted coupler or centering means...

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Details

141287, 141392, 277343, 285 97, B67C 537

Patent

active

044691521

ABSTRACT:
A dust-tight hatch closure assembly for filling railway covered hopper cars having a filling means and a pneumatic seal in the form of an inflatable annulus.

REFERENCES:
patent: 2178494 (1939-10-01), Richardson
patent: 2832378 (1958-04-01), Beavon
patent: 3103958 (1963-09-01), Rath
patent: 3650420 (1972-03-01), Mahaney
patent: 3683976 (1972-08-01), Remane
patent: 3722895 (1973-03-01), Mevissen
patent: 3830267 (1974-08-01), Cass
patent: 4098308 (1978-07-01), Purdum

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