Electric-powered spring-return actuating device
US4613798A · kind A · utility
18Cited by
4References
4Claims
0Family size
Inventor
Key dates
| Filing date | Apr 1, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Apr 1, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2019/0609
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Electric-powered actuating device usable for the positioning control of valves and the like, featuring a motor, mechanical and spring means capable of driving said valve or other attached devices into a predetermined safety position in case of electrical signal or power failure; said actuating device having electrical amplifying means capable of providing pulsed current to drive said motor in one direction, a direct current to hold the motor in a selected position or, no power, to allow the mechanical and spring means to reverse the motor direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.