Knuckle structure to ensure failure at knuckle throat portion

Details Knuckle structure to ensure failure at knuckle throat portion Knuckle structure to ensure failure at knuckle throat portion

1988-01-07

1989-03-14

Reeves, Robert B.

Railway draft appliances

Couplings

Counterpart

B61G 304

Patent

active

048118540

ABSTRACT:
An improved knuckle design for railway couplers wherein the knuckle pin is supported midway between its ends to prevent premature failure of the pin. The kidney core which forms the hollow cavity in the throat portion of the knuckle is isolated from the core which forms the pivot pin hole during casting and is provided with a lateral projection which forms an opening in the side wall of the hollow knuckle throat portion. This insures that under severe stress conditions, the coupler will fracture at the throat portion of the knuckle rather than possibly at the coupler head itself.

REFERENCES:
patent: 2088135 (1937-07-01), Johnson et al.
patent: 2688412 (1954-09-01), Kulieke
patent: 4640422 (1987-02-01), Elliott
patent: 4645085 (1987-02-01), Hanula et al.

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