Electronic valve actuator

Details Electronic valve actuator Electronic valve actuator

1987-02-13

1989-07-04

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

251 3001, 36416701, G05B 1929

Patent

active

048454168

ABSTRACT:
Apparatus is provided for mechanically actuating a valve stem in response to signals generated by an electronic control. A signal means and a sensor means send signals to the electronic control in response to a desired valve stem position and a sensed valve stem position, respectively. The electronic control formulates an error signal if the sensed position is not the desired position. A motor receives a control signal in response to the error signal and drives a linkage for moving the valve stem to the desired position.

REFERENCES:
patent: 1577177 (1926-01-01), Conrader
patent: 4216415 (1980-08-01), Shimonou et al.
patent: 4291262 (1981-09-01), Nakajima
patent: 4485338 (1984-11-01), Matsuura et al.
patent: 4549261 (1985-10-01), Al Mouhamed
patent: 4549271 (1985-10-01), Nozawa et al.
patent: 4591969 (1986-05-01), Bloom et al.
patent: 4609176 (1986-09-01), Powers

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