Motor operated valve apparatus
US6060856A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Sep 21, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/043
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
DC motor-driven valve apparatus, comprising, in combination a valve unit having fluid input and output porting, the valve unit having a valve shaft rotatable between primary and secondary positions corresponding to different flow states; a reversible DC motor having a rotatable output shaft, gearing connected in the drive path between the motor output shaft and valve shaft, such that the ratio of motor shaft rotation to valve shaft rotation is in excess of 100; and circuitry including a potentiometer operatively connected to the valve shaft and to the motor to provide an output signal which varies with degree of valve shaft rotation for reversibly controlling the motor to terminate motor shaft rotation when the valve shaft alternately reaches the primary and secondary positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.