Nutating motor gate valve operator and rotor assembly
US4360752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1980 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Mar 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor for a nutating motor has an annular cavity formed in one face thereof, which cavity receives a helically wound ring of magnetically permeable material. A gate valve operator assembly couples the hollow output shaft of a nutating motor to a valve stem, which axially moves within the hollow output shaft. An internally threaded spindle, or stem nut, is rotatably mounted to engage the externally threaded valve stem. The spindle and the hollow motor shaft are coupled together by means of a tab engaging a correspondingly formed notch. Axial movement of the spindle is prevented by means of a flanged radially extending circumferential rim formed as part of the spindle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.