Stepping actuator

Details Stepping actuator Stepping actuator

1987-07-01

1988-09-20

Rosenthal, Arnold

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

25112904, 25112905, 251 31, 25112903, F16K 3142, F16K 31163

Patent

active

047718072

ABSTRACT:
A valve choke actuating device utilizes a stepping actuator with a feedback control system. A command signal and a feedback signal are compared to produce a train of electrical pulses proportional to the difference in the signals. The train of pulses are utilized to actuate piston-cylinder assemblies to control the opening of the choke.

REFERENCES:
patent: 2469786 (1949-05-01), Rieber
patent: 3153317 (1964-10-01), Manor et al.
patent: 3488030 (1970-01-01), Hulme et al.
patent: 4455012 (1984-06-01), Gupta

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