Fluid pressure operating apparatus for circuit breaker

Details Fluid pressure operating apparatus for circuit breaker Fluid pressure operating apparatus for circuit breaker

2005-06-07

2005-06-07

Donovan, Lincoln (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Interposed non-conductor

C200S08200C

Reexamination Certificate

active

06903295

ABSTRACT:
A fluid pressure operating apparatus, comprising: a fluid pressure cylinder for opening and/or closing a contact; control valves for use of open operation and/or closed-circuit, for bringing the fluid pressure cylinders into an opened-circuit operation and a closed-circuit operation; and solenoids, each being provided in each of those control valves. Each of those solenoids has a plunger therein. An operation initiating time of the control valves for use of open (operation) differs from that of the control valves for use of close (operation), when operating to open circuit and when operating to close circuit.

REFERENCES:
patent: 5353594 (1994-10-01), Yamashita et al.
patent: 5604340 (1997-02-01), Yamada et al.
patent: 5750950 (1998-05-01), Nogami et al.
patent: 6702252 (2004-03-01), Ben-Asher et al.
patent: 2000-090784 (2000-03-01), None

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