Flow rate control valve and flow rate control system
US6230738A · kind A · utility
21Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2000 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Apr 26, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7759
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flow rate control valve comprises a driver in which a rotary shaft is rotated to adjust the opening degree of a valve body. The driver is an ultrasonic motor comprising a stator having piezoelectric elements mounted thereto and a rotor mounted to the rotary shaft and resiliently pressed against the stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.