Railroad spring frog
AssigneeABC Rail Products Corporation
InventorsStephen R. Kuhn, Keith Young
Life of this patent
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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.
Claims5
In a railroad trackwork frog assembly having a relatively fixed rigid wing rail and a partially movable spring wing rail, in combination:
- a base plate element;
- a roller outrigger element fixedly attached to the spring wing rail;
- and
- a ramp plate element fixedly attached to the base plate element,
- said roller outrigger element and said ramp plate element co-operating to vertically elevate said spring wing rail when the spring wing rail is moved laterally relative to the rigid wing rail by an engaged rail car wheel flange.
In a railroad trackwork, a spring wing rail roller holddown assembly comprising:
- a base plate element;
- a horn element rigidly attached to the web of a spring wing rail;
- and
- a roller holddown element fixedly attached to said base plate element and having a roller wheel,
- said roller holddown assembly having an initial gap intermediate the contact surface of said roller wheel and the co-operating contact surface of said horn element to thereby limiting the upwards vertical movement of said horn element and attached spring wing rail relative to said roller holddown element and attached base plate element.
Dependencies are inferred from the claim text.