Railway switches and signals – Fluid-motor actuation
Patent
1993-10-25
1995-05-23
Oberleitner, Robert J.
Railway switches and signals
Fluid-motor actuation
246271, 246358, 246393, 246401, B61L 704
Patent
active
054173922
ABSTRACT:
The present invention relates to a hydraulic apparatus for moving railroad switch points from side-to-side. The apparatus has a hydraulic cylinder operatively connected to the switch points to move the switch points from side-to-side in fluid communication with a power source. The direction of the movement of the switch points is controlled by a valve positioned in fluid communication between the power source and the hydraulic cylinder. The direction of movement of the hydraulic cylinder and, consequently the switch points, is determined by the direction the valve is moved. In another aspect, the present invention has a hydraulic rail pump in fluid communication with the accumulator for storing hydraulic power generated by the rail pump activated by the wheels of passing trains, and a safety reservoir in fluid communication with the accumulator for storing hydraulic power beyond the capacity of the accumulator.
REFERENCES:
patent: 1789621 (1931-01-01), Eppley
patent: 1802875 (1931-04-01), Conley
patent: 4291854 (1981-09-01), Pelt et al.
patent: 4970965 (1990-11-01), Burg et al.
Kirk, Jr. John R.
Morano S. Joseph
Oberleitner Robert J.
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