Freight car door retarder and operating handle

Details Freight car door retarder and operating handle Freight car door retarder and operating handle

1977-10-25

1979-10-30

Moore, Richard E.

Closure fasteners

Bolts

Swinging

292DIG32, E05C 1900

Patent

active

041726090

ABSTRACT:
A door retarder to prevent movement of an unlocked railway freight door includes a spring urging a braking cam roller into a pivoted braking shoe that engages a door support rail. An operating handle has a double lobe cam to operate a linkage and move the braking cam roller away from the braking shoe to allow the door to move freely into and from a car door opening when the operating handle is rotated from a normal, upright position. When released, the operating handle returns to the normal position for retarding door movement.

REFERENCES:
patent: 985433 (1911-02-01), Mink
patent: 1966251 (1934-07-01), Ledwenka
patent: 2077138 (1937-04-01), Witherly
patent: 2563239 (1951-08-01), Hampton
patent: 3750433 (1973-08-01), Sanders

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