Electrothermally operated actuator
US4979365A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Sep 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF03G7/0641
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved electrothermally operated actuator of the type in which a piston is translatable in a piston housing in response to electrical heating of an expandable working fluid in fluid communication with one end of the piston. The working fluid is at least partially disposed in a tube assembly which is connected in an electric circuit which is closed and opened, in response to selected events, to heat or cool the working fluid to effect movement of the piston between retracted and extended terminal positions. An improved sealing assembly prevents leakage of working fluid from the piston housing. The actuator may be connected through a power translating assembly to a rotating element of an operable device translating linear movement of the actuator to rotating movement of the rotating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.