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US 6,164,602 AGranted
Railroad frog assembly with multi-position holdback
AssigneeABC Rail Products Corporation
InventorsStephen R. Kuhn, Keith Young, Ilia Petkov
Life of this patent
Estimating the term…
Abstract
A railroad frog assembly is provided with a spring wing rail multi-position holdback subassembly that continuously retains the spring wing rail in each spring wing rail open position when activated by the wheels of a railcar traversing the frog assembly, and that automatically deactivates the multi-position 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.
Claims5
A railroad trackwork frog assembly comprising:
- a frog fixed point element;
- a frog base plate element;
- a frog spring wing rail element that may be flexed laterally from a closed position abutting said frog fixed point element to an open condition separated from said frog fixed point element by a minimum distance equal to the width of a railcar wheel flange;
- a multiple stop position ratchet latch holdback subassembly coupled to said frog spring wing rail element and to said frog base plate element, and continuously retaining said frog spring wing rail element in a spring wing rail open condition when activated;
- and
- control means selectively deactivating said multiple stop position ratchet latch holdback subassembly,
- said control means deactivating said multiple stop position ratchet latch holdback subassembly following the passing of the last railcar wheel of each train passing through the frog assembly to thereby initiate the spring return of said spring wing rail element from the open condition to a closed condition.
4 more elements
Dependencies are inferred from the claim text.