Railroad spring frog

Details Railroad spring frog Railroad spring frog

1995-02-06

1996-08-13

Le, Mark Tuan

Railway switches and signals

Vehicle-energy actuation

Continuous-rail frogs

246468, B61L 1100

Patent

active

055448488

ABSTRACT:
An improved railroad trackwork frog is provided with a relatively fixed rigid wing rail, a relatively movable spring wing rail, a base plate, and at least one roller outrigger and ramp plate assembly which is attached to the spring wing rail and to the base plate, and which functions to cause limited upwards vertical movement of the spring wing rail relative to the base plate when the spring wing rail is moved laterally relative to the rigid wing rail by the engaged wheel flange of a passing rail car.

REFERENCES:
patent: 930709 (1909-08-01), Whiteman
patent: 1577672 (1926-03-01), Almquist
patent: 2129734 (1938-09-01), Gerlach
patent: 2174367 (1939-09-01), Hoffman
patent: 4624428 (1986-11-01), Frank

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