System for controlling valve fluid flow based on rate of change of close rate acceleration
US8082066B2 · kind B2 · utility
5Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Dec 14, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0989
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Embodiments of the present invention provide systems and methods of controlling fluid dispense to ensure clean break off of fluid at the end of a dispense process and to reduce crystallization of fluid in the dispense nozzle. One embodiment of the present invention can include a controller that can, generate a flow control signal to cause a control valve to close according to a first close rate parameter for a first segment of the close range and to generate the flow control signal to cause the control valve to close according to a second close rate parameter for a second segment of the close range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.