Actuators

Details Actuators Actuators

1977-12-19

1979-12-04

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Oscillating

310166, H02K 3300

Patent

active

041773950

ABSTRACT:
This invention relates to an electrically operated actuator for quarter-turn valves, such as butterfly or ball valves.
The actuator includes a single phase 2-pole dynamo-electric machine comprising a stator having three windings and a rotor having a plurality of short-circuited windings. The rotor is coupled directly with the output shaft and the windings of the stator are energised from a power supply through respective limit switches which are cam controlled by the output shaft.
One of the stator windings controls the final movement of the actuator in each direction of travel and the limit switch for this winding is broken to de-energize the winding by an adjustable stop mechanism.

REFERENCES:
patent: 1653946 (1927-12-01), Clausen
patent: 1863948 (1932-06-01), Spath
patent: 2563271 (1951-08-01), Price
patent: 2700739 (1955-01-01), Orlando
patent: 2767362 (1956-10-01), Beaubien
patent: 3045160 (1962-07-01), Pickering
patent: 3194032 (1965-07-01), Von Brimer
patent: 3216226 (1965-11-01), Alger et al.

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