Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Timo Kehr0
Helmut Heiermeier0
Kurt Kammerl0
Stephan Grob0
Date of Patent
October 26, 2010
Patent Application Number
11798611
Date Filed
May 15, 2007
Patent Primary Examiner
Patent abstract
A circuit breaker comprises a puffer volume (9) and at least one overpressure valve (16) for discharging gas from the puffer volume (9), if the pressure therein exceeds a given threshold. The overpressure valve (16) is formed by a piston (17) and a spring (19) as well as by a cavity (18) in the stationary support body (10) of the moveable contact assembly (2). The overpressure valve (16) is of compact and simple design, has low hysteresis and large cross-section.
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