Circuit breakers with clock spring drives and/or multi-lobe drive cams and related actuators and methods
US9373456B2 · kind B2 · utility
4Cited by
10References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Sep 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2235/016
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Spring operated actuator devices for an electrical circuit breaker and/or electrical switching device include at least one clock spring comprising a disc shaped body with gear teeth and a spiral spring, a cam shaft holding the at least one clock spring with an inner end portion of the spiral spring attached to the cam shaft, and a drive cam held by the cam shaft adapted to be in communication with a follower that directs an actuator to open or close a mobile contact to maintain open and closed energy status of the electrical circuit. The at least one clock spring is configured as a closing spring of the spring operated actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.