Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent
1991-05-02
1993-02-09
Huppert, Michael S.
Railway switches and signals
Crossings, frogs, and mates
Frogs
246385, E01B 714
Patent
active
051847914
ABSTRACT:
A frog tip that can be moved relative to the wing rail is proposed, in which the contact surfaces each curve away from the frog tip and the wing rails in a lengthwise direction.
REFERENCES:
patent: 569653 (1896-10-01), McCann
patent: 859101 (1907-07-01), Odenkirk et al.
patent: 1025369 (1912-05-01), Chamness
patent: 1313780 (1919-08-01), Betts
patent: 2377273 (1945-05-01), Siebert
patent: 3784134 (1974-01-01), Claus et al.
patent: 3787680 (1974-01-01), Perrot
patent: 4953814 (1990-09-01), Oswald et al.
Benenowski Sebastian
Kais Alfred
Nuding Erich
BWG Butzbacher Weichenbau GMBA
Huppert Michael S.
Lowe Scott L.
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