Patent US3433744A successfully refreshed from Google Patents.
Patent US7943873B2 successfully refreshed from Google Patents.
US7943873B2
Active / In Force
US
⏱️ 1.4 years remaining
Circuit breaker with locking mechanism
Assignee: General Electric Co
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Filing: 2008-04-15
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Granted: 2011-05-17
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Expires: 2028-04-15
Abstract
Abstract A circuit breaker with a locking mechanism is provided, which ensures that circuit breaker is switched OFF before applying any trip free locks. The circuit breaker includes a lay shaft coupled to the circuit breaker contacts, a lay shaft cam coupled to the lay shaft, a lifting plate configured to interface with the lay shaft cam, and a padlock plate configured to engage the lifting plate.
Inventors
- 👤 Triplicane Gopikrishnan Babu
- 👤 Janakiraman Narayanan
- 👤 Amit Bose
- 👤 Soundararajan Narayanasamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:18
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/20; H01H9/28; H01H9/281; H01H9/282; H01H3/00; H01H3/32; H01H3/42; H01H71/00; H01H71/10; H01H71/1054; H01H33/00; H01H33/02; H01H33/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
An apparatus for a circuit breaker, comprising: a lay shaft coupled to the circuit breaker; a lay shaft cam coupled to the lay shaft; a lifting plate configured to interface the lay shaft cam; and a padlock plate configured to engage the lifting plate; wherein the lay shaft cam includes a blocking mechanism; wherein the blocking mechanism is a blocking pin; and wherein the lifting plate includes a blocking cam profile configured to engage the blocking pin.
Claim 2
Independent Claim
77 words
An apparatus for a circuit breaker, comprising: a lay shaft coupled to the circuit breaker; a lay shaft cam coupled to the lay shaft; a lifting plate configured to interface the lay shaft cam; and a padlock plate configured to engage the lifting plate; wherein the lay shaft cam includes a blocking mechanism; wherein the blocking mechanism is a blocking pin; and wherein the lifting plate includes a blocking cam profile configured to engage the blocking pin.
Claim 3
Dependent Claim
35 words
The apparatus as claimed in claim 1 , wherein in a breaker closed condition, a vertical movement of the lifting plate is impeded by an engagement of the blocking pin with the blocking cam profile.
Claim 4
Dependent Claim
21 words
The apparatus as claimed in claim 1 further comprising a trip paddle disposed between the lifting plate and the padlock plate.
Claim 5
Dependent Claim
18 words
The apparatus as claimed in claim 3 , wherein the padlock plate is coupled to the trip paddle.
Claim 6
Dependent Claim
27 words
The apparatus as claimed in claim 4 , further comprising a padlock pin disposed on the padlock plate, the padlock pin configured to rotate the trip paddle.
Claim 7
Dependent Claim
28 words
The apparatus as claimed in claim 4 wherein the lifting plate further comprises a lifting plate roller coupled to a padlock lifting profile disposed on the padlock plate.
Claim 8
Dependent Claim
18 words
The apparatus as claimed in claim 4 wherein the padlock plate is configured to displace the lifting plate.
Claim 9
Dependent Claim
38 words
The apparatus as claimed in claim 7 wherein in response to a displacement of the padlock plate: the lifting plate is displaced via the lifting plate profile and the lifting plate roller; and the trip paddle is rotated.
Claim 10
Dependent Claim
143 words
A circuit breaker system, the system comprising: a circuit breaker configured in an OFF condition; a padlock plate disposed on the circuit breaker, wherein the engagement of the padlock plate locks the circuit breaker into a trip free condition; and a locking mechanism configured to lock the circuit breaker in the OFF condition in response to the engagement of the padlock plate; wherein the padlock plate is configured to be pulled the outward from the circuit breaker; a lay shaft coupled to the circuit breaker; a lay shaft cam coupled to the lay shaft; a lifting plate configured to interface the lay shaft cam, wherein the padlock plate is configured to engage the lifting plate; a trip paddle disposed between the lifting plate and the padlock plate; and a padlock pin disposed on the padlock plate and configured to engage a trip paddle.
Claim 11
Dependent Claim
143 words
A circuit breaker system, the system comprising: a circuit breaker configured in an OFF condition; a padlock plate disposed on the circuit breaker, wherein the engagement of the padlock plate locks the circuit breaker into a trip free condition; and a locking mechanism configured to lock the circuit breaker in the OFF condition in response to the engagement of the padlock plate; wherein the padlock plate is configured to be pulled the outward from the circuit breaker; a lay shaft coupled to the circuit breaker; a lay shaft cam coupled to the lay shaft; a lifting plate configured to interface the lay shaft cam, wherein the padlock plate is configured to engage the lifting plate; a trip paddle disposed between the lifting plate and the padlock plate; and a padlock pin disposed on the padlock plate and configured to engage a trip paddle.
Claim 12
Dependent Claim
17 words
The system as claimed in claim 9 further comprising a lay shaft coupled to the circuit breaker.
Claim 13
Dependent Claim
27 words
The system as claimed in claim 9 wherein a padlock plate profile disposed on the padlock plate engages a lifting plate roller disposed on a lifting plate.
Claim 14
Dependent Claim
30 words
The system as claimed in claim 11 wherein a blocking cam profile disposed on the lifting plate engages a blocking pin coupled to a lay shaft of the circuit breaker.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2014-05-16 | 2014-11-15 | 2015-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2018-05-16 | 2018-11-15 | 2019-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2022-05-16 | 2022-11-15 | 2023-05-17 | $7700.00 | Window Closed / Lapsed |