Fluid control valve and a feedback control system therefor
US6766824B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jan 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7882
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The valve comprises a flexible resilient valve member which is positioned in a flexible fluid line in a fluid-tight relationship therewith. An actuating element, such as a ring-shaped member, surrounds the valve member, and an actuating coil is positioned adjacent the ring member. An electrical control signal energizes the coil in operation, producing a magnetic field which moves the actuating element to deform the valve member, opening the valve. Termination of the electrical signal permits the valve member to return to its normal closed position arrangement. A feedback control system is provided for the valve which includes providing pre-established limits on time and volume of fluid delivery. Determinations are successively made as to whether such limitations have been met, and the control valve is closed when one such limitation has been met.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.