Modulating failsafe valve actuator using differential gearing
US4114465A · kind A · utility
18Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1976 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Dec 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18808
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A power operated rotary valve actuator utilizing a differential drive and magnetic clutch to provide continuous valve positioning between full open and full closed positions. The valve drive motor operates through a differential drive and in conjunction with a single electric clutch provides sequential application of rotational torque to a stored energy spring and the valve shaft. The sequential torque application minimizes drive system torque requirements and insures that sufficient energy is available to return the valve to a preselected position at any time during normal operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.