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US 9,218,921 B2Granted
Shunt separating cam followers for circuit breakers and related methods
AssigneeEaton Corporation
InventorWilliam G. Eberts
Life of this patent
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Abstract
Circuit breakers with a cam follower having an upper post with the cam follower held by a cross bar to prevent cam/arm misalignment during high interruption shot on the breaker. Related cam followers have an upwardly extending post located on one side edge portion and cooperates with a shunt to provide shunt separation during high interruption breaker shots.
Claims18
A circuit breaker, comprising:
- a housing;
- a movable arm in the housing;
- a cross bar in the housing in cooperating alignment with the arm;
- a cam follower held by the cross bar so that the cam follower is in communication with the arm, wherein the cam follower comprises an upper post;
- and
- at least one shunt in the housing that has a length that extends from a location outside the cross bar to travel past the upper post over an upper surface of the cam follower whereby the post keeps shunts separated during high interruption breaker shots.
3 more elements
A circuit breaker, comprising:
- a housing;
- a movable arm in the housing;
- a cross bar in the housing in cooperating alignment with the arm;
- and
- a cam follower held by the cross bar in communication with the arm, wherein the cam follower comprises an upper post;
- wherein the cam follower has a substantially rectangular shape with opposing long sides connected by opposing short sides, and an upper surface having a flat medial segment that extends in a width direction corresponding to the long sides, with the upper post residing laterally centered with respect to the width direction, wherein the upper surface has a front end portion that tapers down from the medial segment, and wherein the short sides of the cam follower each comprises a recess.
3 more elements
A cam follower for a circuit breaker, comprising:
- a primary body;
- and
- an upwardly extending post that resides on an outer edge portion of one side of the primary body, wherein the upwardly extending post has a width that is less than a width of the cam follower primary body, wherein the primary body has two opposing long sides connected by two opposing short sides, and wherein the upwardly extending post resides on a medial portion of one of the long sides.
A cam follower for a circuit breaker, comprising:
- a primary body;
- and
- an upwardly extending post that resides on an outer edge portion of one side of the primary body,
- wherein the primary body has a substantially rectangular shape with opposing long sides connected by opposing short sides, and an upper surface having a flat medial segment that extends in a width direction corresponding to a direction of the long sides, with the upper post residing laterally centered with respect to the long sides, and wherein the upper surface has a front end portion that tapers down from the medial segment.
1 more element
A circuit breaker, comprising:
- a housing;
- a movable contact arm in the housing;
- a cross bar in the housing in cooperating alignment with the contact arm;
- a cam follower held by the cross bar so that the cam follower is in communication with the contact arm, the cam follower having an upper surface;
- and
- first and second shunts in the housing that have a length that extends from a location outside the cross bar to travel over the upper surface of the cam follower,
- wherein the cam follower upper surface has an upwardly extending post with a width that is less than a width of a primary body of the cam follower and is adapted to allow a respective shunt to extend over the cam follower upper surface past one side of the upwardly extending post to maintain shunt separation to thereby prevent shunt travel onto a top of the contact arm during a high interruption shot.
4 more elements
Dependencies are inferred from the claim text.