Valve positioning monitoring apparatus
US5305781A · kind A · utility
12Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Dec 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
These is disclosed apparatus for monitoring the rotative position of a rotary closure member of a valve, wherein a shaft is rotatably mounted in a housing for connection to a part exterior of the housing which rotates in response to rotation of the closure member, and cam rings are assembled for rotation about the shaft through pinion gears rotatable with the shaft to cause cam surfaces about the rings to engage and activate switches in the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.