# US 7,411,139 B2 · Circuit breaker interlock devices, systems, and methods

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- Number: US 7,411,139 B2
- Document ID: US7411139B2
- Status: Granted
- Kind: B2
- Application number: 11/894,405
- Filed: 2007-08-21
- Published: 2007-12-20
- Granted: 2008-08-12
- Earliest claimed: 2006-02-10
- Assignees: Siemens Energy & Automation, Inc.
- Inventors: Brian Timothy McCoy
- Web page: https://patentgrep.com/patent/US7411139B2

## CPC

- H01H 9/26: for interlocking two or more switches ({H01H13/568 takes precedence;} by a detachable member H01H9/28 {; for electromagnetic relays H01H50/323})
- H01H 9/28: for locking switch parts by a key or equivalent removable member (switches operated by a key H01H27/00; locking by removable part of two-part coupling device H01R)
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

Certain exemplary embodiments comprise a breaker interlock device adapted to mechanically resist switching a handle of a first circuit breaker from an OFF position to an ON position when a handle of a second circuit breaker is in an ON position, wherein the first circuit breaker is adjacent to the second circuit breaker.

## Claims

### Claim 1

A system comprising:
a breaker interlock device adapted to mechanically couple a handle of a first circuit breaker to a handle of a second circuit breaker, said breaker interlock device is adapted for said first circuit breaker to be adjacent to said second circuit breaker, said breaker interlock device is adapted for said first circuit breaker and said second circuit breaker to be in a side-by-side orientation, said breaker interlock device comprising:
a first ear adapted to clipably attach said breaker interlock device to at least said first circuit breaker;
a second ear adapted to clipably attach said breaker interlock device to at least said second circuit breaker;
a clip adapted to snapably attach said breaker interlock device to said first circuit breaker and/or said second circuit breaker; and
a boomerang-shaped latch adapted to contact said handle of said first circuit breaker and said handle of said second circuit breaker, said boomerang-shaped latch adapted to resist motion of said handle of said first circuit breaker from an OFF first position to an ON second position unless said handle of said second circuit breaker is in an OFF position.

### Claim 2 (depends on 1)

The system of claim 1, further comprising:
said first circuit breaker.

### Claim 3 (depends on 1)

The system of claim 1, further comprising:
said second circuit breaker.

### Claim 4 (depends on 1)

The system of claim 1, further comprising:
a breaker panel adapted to releasably house said first circuit breaker and said second circuit breaker, said breaker panel comprising a dead front, said dead front adapted to be removable with said breaker interlock device installed, said breaker interlock device adapted to function with said dead front removed.

### Claim 5 (depends on 1)

The system of claim 1, wherein said breaker interlock device defines an opening adapted to receive said handle of said first circuit breaker and said handle of said second circuit breaker.