Spring-type railroad brake shoe locking key

Details Spring-type railroad brake shoe locking key Spring-type railroad brake shoe locking key

1996-03-18

1997-07-15

Oberleitner, Robert J.

Brakes

Elements

Shoe fasteners

F16D 6504

Patent

active

056474601

ABSTRACT:
A brake shoe locking key is provided with a retention tab that is saw-tooth shaped and extends across the entire width of the key shank. The retention tab is upraised from the shank more than the correspondingly-shaped serrations typically formed on the bottom of the key and is thus more effective in engaging the brake head as an initial detent to prevent the key from backing out of the keyhole in the brake head when a loose fitting key fails to retain its locking position. In addition, the retention tab is adapted to engage the keybridge at the orifice through which the key passes in order to provide a further detent to prevent a loose key from backing completely out of its locking connection between the brake head and brake shoe, in the event the first detent fails to engage.

REFERENCES:
patent: 854475 (1907-10-01), Fairbanks
patent: 2031127 (1936-02-01), Peycke
patent: 2094273 (1937-09-01), Mack
patent: 2858914 (1958-11-01), Arrasmith
patent: 3015372 (1962-01-01), Landell et al.
patent: 3077957 (1963-02-01), Arrasmith
patent: 4466513 (1984-08-01), Dedek
patent: 5560453 (1996-10-01), Conrad

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