Position sensor for a rotary valve
US4957274A · kind A · utility
17Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Dec 26, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/042
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A position of a rotary valve having limited motion between an open and a closed position is determined by a limit sensor. A stepper motor supplies power to open and close the rotary valve. A coupling transmits any stepper motor motion to the rotary valve. A sensor actuator is affixed to the coupling. A limit sensor determines the position of the rotary valve by sensing the position of the sensor actuator, wherein there is no contact between the sensor actuator and the limit switch when the position of the rotary valve is being determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.