Safety crank assembly for railroad box car plug-type doors

Details Safety crank assembly for railroad box car plug-type doors Safety crank assembly for railroad box car plug-type doors

1978-03-13

1978-12-19

Downey, Kenneth

Movable or removable closures

Mounted for multidirectional or oblique movement

Initial or terminal movement transverse to sliding movement...

E05D 1510

Patent

active

041299655

ABSTRACT:
A safety crank assembly for railroad box car plug doors which is mounted between the door, intermediary of the operating crank assemblies, and the retainer track above the door. The safety crank assembly includes a crank arm having an end portion for engaging the retainer track. The engaging end portion is provided with a shuttle which has a rearwardly positioned and downwardly extending skirt which, in case of failure, exerts a load on a portion of the lower shelf of the track which is located much nearer to the side of the car than the crank arm itself would exert on the shelf in case of failure. The upper portion of the shuttle slides in a U-shaped channel at the top of the retainer track to keep it from rotating with rotation of the crank and exerts a load on the downwardly extending shelf of the U-shaped channel of the retainer.

REFERENCES:
patent: 2765502 (1956-10-01), Torburn
patent: 3913269 (1975-10-01), Ross, Jr.
patent: 4043078 (1977-08-01), Dyche et al.
patent: 4048755 (1977-09-01), Wolak et al.

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