Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Reexamination Certificate
2007-08-08
2010-10-12
Leon, Edwin A. (Department: 2833)
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
C218S154000
Reexamination Certificate
active
07812273
ABSTRACT:
A switchgear apparatus is provided in which an impact induced by a close operation is mitigated, featuring space saving and high reliability with low costs.The switchgear apparatus includes a switching unit3that is composed of a fixed electrode1and a movable electrode2; a movable shaft4that is extended from the movable electrode2; an operating mechanism5that produces driving force and transfers the driving force to the movable shaft4; a switching-unit holder6that holds the switching unit3and the movable shaft4thereinside; and a holder supporting unit7that has a fixing plane so as to fix the switching-unit holder6thereonto. The switchgear apparatus is arranged in such a manner that the holder supporting unit7serving as the fixing plane is constituted of a plurality of plates layered in the axial direction along the movable shaft4. In a case of the close operation, because kinetic energy in the overall system is consumed by the friction generated between the layered plates owing to distortion of the layered plates, energy that allows the movable electrode2to bounce back and forth is lowered, so that it is possible to shorten a chattering time.
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Imagi Akihiko
Kim Tae Hyun
Takahara Osamu
Yano Tomotaka
Leon Edwin A.
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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