High-voltage switches with arc preventing or extinguishing devices inventions 03/09

20090078680 - Arc chamber of a high-voltage switch with a heating volume of variable size: An arc chamber is disclosed for a gas-insulated high-voltage switch. It contains a heating volume for accommodating compressed quenching gas from an arc zone. A part of the wall of the heating volume is formed by a piston which is displaceable against a restoring force. The piston is arranged as... Agent: Buchanan, Ingersoll & Rooney PC

20090078681 - Vacuum circuit interrupter grounding assembly: A vacuum circuit interrupter having a pole unit structure and an operating mechanism structured to move the vacuum circuit interrupter contacts between a first, closed position, wherein a movable contact is coupled to, and in electrical communication with, a fixed contact, and a second, open position wherein the movable contact... Agent: Martin J. Moran

20090057273 - Arc extinguishing device of circuit breaker for manual motor starter: Disclosed is an arc extinguishing device of circuit breaker for manual motor starter capable of swiftly extinguishing and discharging an arc generated by a fault current flowing into a motor circuit during an interruption operation of a circuit breaker, thereby enhancing the performance of interruption.... Agent: Lee, Hong, Degerman, Kang & Waimey