Patent ID: 7265311

Claim:
An arc chamber barrier for a circuit breaker, said circuit breaker having a housing assembly with a base portion and a primary cover, said base portion and said primary cover structured to be coupled together and to define at least one elongated contact chamber, said at least one contact chamber having an arc chamber portion and an operating mechanism portion, said primary cover having a second interlock component, at least one pair of separable contacts disposed in said at least one contact chamber, said at least one pair of separable contacts including a stationary contact and a movable contact disposed on a moving arm, an operating mechanism disposed in said circuit breaker housing assembly and coupled to said at least one pair of separable contacts and structured to move said at least one pair of separable contacts between a first, open position and a second, closed position, said arc chamber barrier comprising: an arc chamber barrier body having a first interlock component, said arc chamber barrier first interlock component structured to engage said primary cover second interlock component; said arc chamber barrier body structured to be disposed in said at least one elongated contact chamber at the interface of said arc chamber portion and said operating mechanism portion; and whereby said arc chamber barrier first interlock component resists displacement of said arc chamber barrier body when said at least one pair of separable contacts moves between said second, closed position and said first, open position.