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US 5,494,243 AGranted
Railroad switch stand with foot operated handle latch
AssigneeABC Rail Products Corporation
InventorStephen R. Kuhn
Life of this patent
Estimating the term…
Abstract
A railroad switch stand for switching railroad track switch points is provided with a manually-operated crank assembly that is coupled to the switch stand switching input shaft without included lost motion and that has an included yoke with latch bars that function to stop and secure the crank assembly in operating positions that reduce operator risk to excessive back stress and lower spine injury.
Claims5
A manual railroad switch stand for changing railroad track switchpoint positions, comprising:
- a switching input shaft that has a longitudinal axis and that is rotated throughout an operating angular range substantially less than 180 degrees to change track switchpoint positions;
- a manual crank arm connected to said input shaft and having a longitudinal axis;
- a latch yoke attached to said crank arm and having a pair of latch bars positioned distantly from and to each side of said crank arm longitudinal axis;
- and
- coupling means rigidly connecting said crank arm and said attached latch yoke with latch bars to said switch stand switching input shaft;
- and
- wherein each of said latch bars are positioned to engage and be stopped by a respective one of a pair of foot latches substantially diametrically positioned to opposite sides with respect to said switching input shaft longitudinal axis when said manual crank arm and connected switch stand switching input shaft are rotated through the input shaft operating angular range to accomplish a change in switch positions.
4 more elements
A railroad switch stand manual crank assembly comprising:
- an elongate crank arm having longitudinal extremes and a longitudinal axis;
- a hub connected to said crank arm at one of said crank arm longitudinal extremes;
- a handle connected to said crank arm at the other of said crank arm longitudinal extremes;
- and
- a latch yoke connected to said crank arm at a position intermediate said hub and said handle and having a pair of latch bars each positioned distantly from and transversely with respect to said crank arm longitudinal axis,
- said latch bars being positioned so as to form an angle of approximately 30 degrees between said crank arm longitudinal axis and a line extending from said hub to one of said latch bars.
3 more elements
Dependencies are inferred from the claim text.