Pneumatic controller
US4453559A · kind A · utility
2Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1981 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Oct 19, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2452
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pneumatic process controller includes a nozzle mounted on a set point lever and a flapper with a connected process lever. The set point lever pivots the nozzle about a set point and input axis in response to set point adjustment. The process lever pivots the flapper about the same axis in response to the process variable. The nozzle and set point lever are mechanically separated from the flapper and process lever. Artificial effect upon the process variable from set point adjustment is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.