Railway switches and signals – Crossings – frogs – and mates – Flange-supported wheel
Patent
1987-02-02
1989-04-25
Basinger, Sherman D.
Railway switches and signals
Crossings, frogs, and mates
Flange-supported wheel
E01B 710
Patent
active
048240559
ABSTRACT:
An improved railroad FROG of nearly shrink free casting and method of forming is disclosed. The FROG is comprised of a triangular shaped top area with an actual FROG point at the center of the casting, widening at one end to a heel and heel extension with flangeways adjacent each side to allow the passage of wheels. A throat is located ahead of the actual FROG point and extends forwardly to a toe end of the casting. The throat is bound by wings of the casting. The casting has a solid arched, ribbed supporting structure below the running surface of the casting.
REFERENCES:
patent: 896154 (1908-08-01), Reinoehl et al.
patent: 3263076 (1966-07-01), Magnus et al.
patent: 4081162 (1978-03-01), Frank
Barlow Keith M.
Stanley Thomas R.
Tuningley Allen J.
Basinger Sherman D.
Nortrak Limited
Sotelo Jesus D.
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