Optical actuator
US4637071A · kind A · utility
12Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2196
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An arrangement for the remote actuation of a controlled device, e.g. a hydraulic valve, in situations with stringent safety requirements, uses optical power. The optical power, e.g. from a high-power laser, is conveyed via an optical fibre (1) to the controlled device. Here it falls on a heat-absorbent surface (2), as a result of which a volatile fluid (e.g. freon) is evaporated. This via a bellows (4) drives an output rod (5), which operates the controlled device. Alternatives include a bimetallic strip, a thermostat-type capsule, and a memory metal strip, as the heat responsive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.