Bolt locks for freight car, trailer truck and air cargo doors

Details Bolt locks for freight car, trailer truck and air cargo doors Bolt locks for freight car, trailer truck and air cargo doors

1972-10-20

1976-04-13

Hunter, H. Hampton

Closure fasteners

Bolts

Sliding

292DIG32, E05C 106

Patent

active

039500187

ABSTRACT:
Anti-tampering bolt locking devices for hinged or sliding railway freight car or for other freight vehicle doors. The bolt locking devices may consist of air pressure or electromagnetically controlled bolt detents which may be either locally or remotely operated. The bolts may be directly operated by air pressure cylinders. Compressed air cartridges may be employed as the compressed air source. The cartridges may contain small quantities of lubricant such as graphite, or the like.

REFERENCES:
patent: 2709610 (1955-05-01), Chandler
patent: 2997752 (1961-08-01), Henrikson et al.
patent: 3295878 (1967-01-01), Houvener

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