Railway hopper car labyrinth gate seal

Details Railway hopper car labyrinth gate seal Railway hopper car labyrinth gate seal

1976-12-27

1978-09-12

Makay, Albert J.

Railway rolling stock

Special car bodies

Dumping

105282P, 105308A, 105308C, 105308P, 277 56, B61D 702, B61D 720, B61D 722, B61D 726

Patent

active

041128524

ABSTRACT:
A railway hopper car chute having a discharge opening defined by a sidewall frame with a sliding plate gate operating in the discharge opening. An undercarriage support frame is fixed to the sidewall frame to support the gate for sliding movements relative the opening. A labyrinth seal for preventing the unwanted discharge of granular lading comprising an upwardly directed gate flange is integrally formed on at least part of the periphery of the gate plate. The flange is disposed in the space defined by the outside of the chute frame and the inside of the undercarriage frame. A pair of spaced elongated bars is disposed in the space between the gate flange and the adjacent hopper sidewall frame. These elongated bars together with the flange form a labyrinth seal with one of the bar seal elements being fixed to the gate and the other to the adjacent chute sidewall frame. Both seal elements define a labyrinth gap therebetween which serve as a non-contact seal for any granular lading located within the chute.

REFERENCES:
patent: 987877 (1911-03-01), Harrigan
patent: 1027241 (1912-05-01), Coleman
patent: 1136315 (1915-04-01), Clark
patent: 3082701 (1963-03-01), Dorey
patent: 3130687 (1964-04-01), Smith
patent: 3255553 (1966-06-01), Dorey
patent: 3569611 (1971-03-01), Berends
patent: 3779172 (1973-12-01), Schipper et al.

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