Hydraulically-activated operating system for an electric circuit

Details Hydraulically-activated operating system for an electric circuit Hydraulically-activated operating system for an electric circuit

1978-05-18

1979-09-04

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Piston

200148B, H01H 3538

Patent

active

041669371

ABSTRACT:
This operating system comprises a fluid motor having a piston, a breaker-opening space at one side of the piston, and a breaker-closing space at its opposite side. An accumulator freely communicates with the breaker-opening space for supplying pressurized fluid thereto during a circuit-breaker opening operation. A normally-closed valve located on the breaker-closing-side of the piston is openable to release liquid from the breaker-closing space so that pressurized liquid in the breaker-opening space can drive the piston in an opening direction. Means is provided for restoring the valve to its closed position following the circuit-breaker opening operation. An impeded passage affords communication between the accumulator and the breaker-closing space to allow pressurized liquid to flow from the accumulator to the breaker-closing space and develop a pressure therein substantially equal to accumulator pressure when the valve is restored to closed position following breaker-opening. This passage is so impeded that the flow therethrough from the accumulator into the breaker-closing space is sufficiently low during initial opening motion of the piston through a substantial portion of its opening stroke as to avoid interference with said initial opening motion of the piston.

REFERENCES:
patent: 3008017 (1961-11-01), Strom
patent: 4118613 (1978-10-01), Barkan

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