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US 5,806,810 AGranted
Spring rail frog having switchable magnet for holding wing rail open
AssigneeABC Rail Products Corporation
InventorsKieth Young, Stephen R. Kuhn
Life of this patent
Estimating the term…
Abstract
A railroad frog assembly is provided with a switched magnet that immediately retains a frog flexible wing rail in its open position in response to a railcar wheel passing through the frog assembly, and that delayably releases the frog flexible wing rail from its open position for subsequent closure by an included frog compression spring.
Claims9
A railroad trackwork frog assembly comprising:
- a frog fixed point element;
- a frog wing rail element that may be flexed laterally from a closed position abutting said frog fixed point element to an open position separated from said frog fixed point element by a minimum distance equal to the width of a railcar wheel flange;
- a switched magnet element having an "off" condition and an "on" condition, and contacting and retaining said frog wing rail element in its open position when actuated to an "on" condition;
- and
- control means actuating said switched magnet element between said magnet element "on" and "off" switched conditions,
- said control means responding to the presence of a railcar wheel to actuate said switched magnet element to a switched "on" condition, and to additionally delayably actuate said switched magnet element to a switched "off" condition.
3 more elements
Dependencies are inferred from the claim text.