Pivot joint for a movable contact arm in a molded case circuit breaker
US6563407B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2001/5838
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pivot joint for a movable contact arm assembly and a circuit breaker having an operating mechanism coupled to a line terminal, a trip mechanism and a load terminal with the load terminal coupled to a pivot mounting member. The pivot joint comprises a recess in a first sidewall of the contact arm with the recess co-axial with a mounting hole in the contact arm. A second recess is provided in a second sidewall of the contact arm with the second recess co-axial with the second mounting hole in the contact arm. The first and second recesses are co-axial with each other. A shaped washer, configured to fit in each of the first and second recesses is provided and maintained in position by a mounting axle configured to engage each shaped washer, each mounting hole and the pivot mounting member. The contact arm is then free to pivot about the mounting axle. A spring, with the spring configured to engage both ends of the mounting axle urge the contact arm against each shaped washer thereby completing the pivot joint. The two recesses formed in the contact arm can be in a facing relationship with each other and the shaped washers can be spherical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.