Mine car

Details Mine car Mine car

1978-05-09

1979-11-13

Pekar, John A.

Motor vehicles

Steering by driving

Combined with manual steering

74606R, B62D 1112

Patent

active

041740130

ABSTRACT:
A fire safety transmission apparatus comprising an explosion-proof container, an adapter plate secured to the container, a cylindrical sleeve mounted to the adapter plate defining a central bore, allowing communication with the interior of the container. The sleeve bore is stepped, defining seats for a plurality of ball bearing races mounted therein. A rotatable stepped shaft having a diameter adapted to fit within the central bore rests on the ball bearing races. The shaft is connected to a motor mounted in the explosion-proof container with the spacing defined between the inner wall of the cylindrical sleeve and the outer surface of the freely rotating shaft being sized a predetermined tolerance for a predetermined length sufficient to prevent a flame from passing therethrough.

REFERENCES:
patent: 1312828 (1919-08-01), Brantley
patent: 1488629 (1924-04-01), Wick
patent: 2132661 (1938-10-01), Temple
patent: 2465436 (1949-03-01), Eckert
patent: 2714826 (1955-08-01), Jasper
patent: 2910882 (1959-11-01), Wellauer
patent: 2976945 (1961-03-01), Schreck

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