Optical actuator
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United States of America Patent
Stats
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Jan 13, 1987
Grant Date -
N/A
app pub date -
Nov 28, 1984
filing date -
Nov 30, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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