Valve switch unit
US8534640B2 · kind B2 · utility
1Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2008 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Apr 23, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B7/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A valve switch unit has a detector configured to detect an input, such as current, from a machine controller. The valve switch unit also has a switching circuit configured to switch control of the one or more valves an automatic controller to the machine controller if the input from the machine controller exceeds a predetermined threshold. When the current detected exceeds the predetermined threshold, the circuit switches control from the automatic controller to the machine controller. In a similar fashion, when the current falls below the predetermined threshold, the circuit switches control back to the automatic controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.