Valve position switch
US6650211B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 25, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H36/0033
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical switch for indicating the position of a movable member of a valve is disclosed. The movable member of the valve may be a linear moving stem or a rotating shaft. The switch includes a sensor held in a sealed enclosure. The sensor may be a reed switch or a Hall effect sensor. A pivot arm attaches to the enclosure and is biased by a spring. The pivot arm holds a permanent magnet adjacent to the enclosure. When an actuator moves the movable member of the valve, the pivot arm is forced against the enclosure. The magnet is moved into aligned relation to the sensor and electrically indicates the position of the movable member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.