Circuit breaker with integrated safety lock-off mechanism

Patent metadata

Field	Value
Publication number	US-12548719-B2
Application number	US-202318319936-A
Country	US
Kind code	B2
Filing date	May 18, 2023
Priority date	May 13, 2022
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A circuit breaker is configured to ensure electrical safety when working on its circuits. The circuit breaker comprises a housing with an exterior boundary. The housing includes an “integrated” Lock-Off feature. It is integrated to one or more housing components of the circuit breaker not as a separate component to achieve most simplicity and least space used as compared to an “add-on” accessory based Lock-Off feature. The “integrated” Lock-Off feature has a feature that is configured to receive a shackle or a shank of a padlock. The circuit breaker further comprises a built-in Lock-Off mechanism including a handle that is configured to move relative to the feature. The built-in Lock-Off mechanism in combination with the Lock-Off feature is configured to prevent handle from being turned ON with the use of padlock. The padlock prevents circuit breaker from turning ON by impeding the handle from moving to an ON-position.

First claim

What is claimed is:

1 . A circuit breaker, comprising:
a housing with an exterior boundary, the housing including a fixed lock-off feature extending away from the exterior boundary, wherein the fixed lock-off feature is configured to receive a shackle or a shank of a padlock; and a built-in safety mechanism including a handle that is configured to move relative to the fixed lock-off feature, wherein the built-in safety mechanism in combination with the fixed lock-off feature is configured to prevent the handle from being turned ON with the use of the padlock, wherein the padlock prevents the circuit breaker from turning ON by impeding the handle from moving to an ON-position, and wherein, when the circuit breaker is turned ON, the handle of the built-in safety mechanism covers the fixed lock-off feature preventing the shackle or the shank of the padlock from being installed in the fixed lock-off feature.

2 . The circuit breaker of claim 1 , wherein the circuit breaker is a ground-fault circuit interrupter (GFCI) or an arc-fault circuit interrupter (AFCI) or a solid-state circuit breaker or a thermal magnetic molded-case circuit breaker (MCCB) or a miniature circuit breaker (MCB) or a residential circuit breaker or an industrial circuit breaker.

3 . The circuit breaker of claim 1 , wherein the housing includes a main base having a handle pivot hole.

4 . The circuit breaker of claim 3 , wherein the handle pivot hole includes first ribs and the fixed lock-off feature includes second ribs to respectively strengthen the handle pivot hole and the fixed lock-off feature.

5 . The circuit breaker of claim 4 , wherein a pivot of the handle includes a dowel pin.

6 . The circuit breaker of claim 5 , wherein the built-in safety mechanism includes a modular base that connects the pivot of the handle to the main base.

7 . The circuit breaker of claim 6 , wherein the handle is connected to the modular base using the dowel pin inside the pivot of the handle.

8 . The circuit breaker of claim 7 , wherein the pivot of the handle includes a first handle pivot on the modular base and a second handle pivot on the main base.

9 . The circuit breaker of claim 8 , wherein the main base has the second handle pivot connecting the modular base to the main base and sharing the pivot of the handle.

10 . The circuit breaker of claim 9 , wherein the handle is configured to pivot in the modular base such that the modular base is sandwiched between the main base and the handle.

11 . A method, comprising:
providing a housing with an exterior boundary, the housing including a fixed lock-off feature extending away from the exterior boundary, wherein the fixed lock-off feature is configured to receive a shackle or a shank of a padlock; and providing a built-in safety mechanism including a handle that is configured to move relative to the fixed lock-off feature, wherein the built-in safety mechanism in combination with the fixed lock-off feature is configured to prevent the handle from being turned ON with the use of the padlock, wherein the padlock prevents the circuit breaker from turning ON by impeding the handle from moving to an ON-position, and wherein, when the circuit breaker is turned ON, the handle of the built-in safety mechanism covers the fixed lock-off feature preventing the shackle or the shank of the padlock from being installed in the fixed lock-off feature.

12 . The method of claim 11 , wherein the circuit breaker is a ground-fault circuit interrupter (GFCI) or an arc-fault circuit interrupter (AFCI) or a solid-state circuit breaker or a thermal magnetic molded-case circuit breaker (MCCB) or a miniature circuit breaker (MCB) or a residential circuit breaker or an industrial circuit breaker.

13 . The method of claim 11 , wherein the housing includes a main base having a handle pivot hole.

14 . The method of claim 13 , wherein the handle pivot hole includes first ribs and the fixed lock-off feature includes second ribs to respectively strengthen the handle pivot hole and the fixed lock-off feature.

15 . The method of claim 14 , wherein a pivot of the handle includes a dowel pin.

16 . The method of claim 15 , wherein the built-in safety mechanism includes a modular base that connects the pivot of the handle to the main base.

17 . The method of claim 16 , wherein the handle is connected to the modular base using the dowel pin inside the pivot of the handle.

18 . The method of claim 17 , wherein the pivot of the handle includes a first handle pivot on the modular base and a second handle pivot on the main base.

19 . The method of claim 18 , wherein the main base has the second handle pivot connecting the modular base to the main base and sharing the pivot of the handle.

20 . The method of claim 19 , wherein the handle is configured to pivot in the modular base such that the modular base is sandwiched between the main base and the handle.

Assignees

• Siemens Industry Inc

Inventors

• Kim Raiden Jay

Classifications

• H01H21/04

  Cases; Covers · CPC title

• H01H21/22

  Operating parts, e.g. handle · CPC title

• H01H71/521

  Details concerning the lever handle · CPC title

• H01H9/281 Primary

  making use of a padlock (H01H9/287 takes precedence) · CPC title