Patent ID: 6563407
Filing Date: 2003-05-13
Classification: H01H

Abstract:
A pivot joint for a movable contact arm assembly in a circuit breaker having an operating mechanism coupled to a line terminal, a trip mechanism and a load terminal with the load terminal coupled to a pivot mounting member, the pivot joint comprising:a recess in a first sidewall of the contact arm, with the recess co-axial with a mounting hole in the contact arm; a second recess in a second sidewall of the contact arm, with the second recess co-axial with a second mounting hole in the contact arm, wherein the first and second recesses are co-axial with each other; a shaped washer, configured to fit in each of the first and second recesses; a mounting axle configured to engage each shaped washer, each mounting hole and the pivot mounting member, wherein the contact arm is free to pivot about the mounting axle; and, a spring, with the spring configured to engage both ends of the mounting axle and urge the contact arm against each shaped washer.