Stepper motor gas valve and method of control
US8752577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2013 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Feb 25, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7764
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A stepper-motor gas valve control is disclosed that includes a main diaphragm in a chamber that controllably displaces a valve relative to an opening in response to changes in pressure, to adjust fuel flow through the valve. A servo-regulator diaphragm is provided to regulate flow to the main diaphragm, to thereby control the rate of fuel flow. A stepper motor is configured to move in a stepwise manner to displace the servo-regulator diaphragm, to control fluid flow to the main diaphragm. A controller mounted on the stepper-motor regulated gas valve control receives and converts an input control signal from a heating system to a reference value between 0 and 5 volts, and selects a corresponding motor step value. The control responsively moves the stepper-motor in a step wise manner to displace the servo-regulator diaphragm and thereby regulates the rate of fuel flow through the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.