Railroad frog assembly with latch holdback

Details Railroad frog assembly with latch holdback Railroad frog assembly with latch holdback

1999-02-17

2000-12-12

Basinger, Sherman

Railway switches and signals

Switch-connected frogs

246274, 246275, 246276, 246387, 246389, E01B 700

Patent

active

061586978

ABSTRACT:
A railroad frog assembly is provided with a spring wing rail latch holdback subassembly that continuously retains the spring wing rail in a spring wing rail fully open position when activated by the wheels of a railcar traversing the frog assembly, and that automatically deactivates the latch holdback subassembly and releases the spring wing rail from retention in an open condition and for complete closing after the last railcar wheel has passed through the frog assembly.

REFERENCES:
patent: 330862 (1885-11-01), Wuerpel
patent: 642867 (1900-02-01), MacPherson
patent: 2036198 (1936-04-01), Cooper et al.
patent: 5417392 (1995-05-01), Wyatt
patent: 5806810 (1998-09-01), Young et al.

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