Patent ID: 9576753
Date: 2017-02-21
CPC Classifications: H01H

Claim:
1. A contact system of a circuit breaker comprising: a fixed contact; at least one moveable contact arm assembly comprising a moveable contact arm having a moveable contact thereon, the moveable contact arm moveable to position the moveable contact into engagement with the fixed contact to define a closed condition and out of engagement with the fixed contact to define a blow open condition; a carrier assembly operatively coupled to the moveable contact arm; a latch plate operatively coupled to the carrier assembly; a trip shaft operatively coupled to the carrier assembly, the trip shaft having a non-circular region defining an engagement surface disposed in contact with the latch plate in the closed condition; and a biasing portion of the moveable contact arm disposed proximate the trip shaft in the closed condition and configured to rotate the trip shaft out of engagement with the latch plate and into the blow open condition.