Systems and methods for rotary knob friction adjustment control
US9627160B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2016 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Feb 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/7418
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker including a trip unit having an internal support and a friction adjustment control system for knob control is provided. The internal support includes a first opening to receive a first rotary knob having one or more first smooth rings and a second opening to receive a second rotary knob having one or more second smooth rings. The trip unit includes a first knob control of the first rotary knob. The first knob control includes a first structural support, a first housing and a first spring installed in the first housing against the first structural support. The trip unit further includes a second knob control of the second rotary knob. The second knob control includes a second structural support, a second housing and a second spring installed in the second housing against the second structural support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.