Closing means for a hatch cover

Details Closing means for a hatch cover Closing means for a hatch cover

1976-09-20

1978-02-14

Hoffman, Drayton E.

Railway rolling stock

Special car bodies

Freight

114203, 292260, B61D 3900, B65D 4528

Patent

active

040732398

ABSTRACT:
A hatch cover having a locking mechanism comprising a single hand wheel with a shaft threaded to the cover for limited up and down movement as the hand wheel is turned. A locking strap is hinged on one side of the hatch cover, releasably locked on the other side and has an opening through which the shaft extends. The locking strap is confined between the hand wheel and a thrust washer attached to the shaft in such a fashion that rotation of the hand wheel in one direction produces contact between the locking strap and thrust washer to force the cover downwardly. Rotation in the other direction lifts the hatch cover to permit unlatching of the locking strap and access to the hopper.

REFERENCES:
patent: 553344 (1896-02-01), McCormick et al.
patent: 1432591 (1922-10-01), Carll
patent: 1956665 (1934-05-01), Cahall
patent: 1973228 (1934-09-01), Schott
patent: 2659514 (1953-11-01), Henderson
patent: 3145039 (1964-08-01), Richter
patent: 3266440 (1966-08-01), Price et al.
patent: 4044918 (1977-08-01), Alton

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