Fluid metering valve
US7017884B2 · kind B2 · utility
38Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Aug 18, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/047
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid metering valve includes a gear rack which is slidable on a valve stem in which a spring counteracts the force of an actuator to maintain a constant load on the gear mechanism to prevent backlash. Corresponding stop mechanisms between the gear and the shaft of a rotary actuator come into engagement with each other near a fully closed position of the fluid metering valve for zero calibration purposes upon power loss to the actuator. A single valve member and a single actuator of the fluid metering valve provides for both a shut-off function and a metering function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.