Motor operated valve
US6561480B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Nov 22, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a motor-operated valve having no additional stopper for stopping the rotation of a rotor at fully open and closed states of the valve to allow a reduced number of parts of the valve and to prevent a noise otherwise generated by the abutment of the rotor against a stopper. The motor-operated valve includes a rotor 17 having a shaft 18 formed with an external thread 20. The motor-operated valve also includes a needle valve element 6 having a needle valve head 5 at one end portion thereof and an internal thread 16 engaging with the external thread 20 at another end portion. The valve element has a joining portion 14 for joining the valve head to the internal thread 20. The motor-operated valve also includes a main valve body 1 having a guide portion which stops the rotation of the valve element but allows the axial movement of the valve element. The shaft 18 has an upper end supported by a supporting portion provided on a top wall of a valve housing 22, while a lower end of the shaft is rotatably supported by a bearing 13 secured to the main valve body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.