Process control system

Details Process control system Process control system

1980-08-27

1982-11-23

Wise, Edward J.

Boots, shoes, and leggings

364140, 415 15, G05B 1500, F01D 1702

Patent

active

043608825

ABSTRACT:
In a process in which both a turbine or motor and an expander are utilized to drive a compressor, the use of the expander is substantially maximized while still insuring that the driving force applied to the turbine or motor does not go below a low limit. A variable limit is also utilized to prevent a stuck valve from being overdriven by a controller.

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patent: 3515860 (1970-06-01), Fitzgerald, Jr.
patent: 3581070 (1971-05-01), Tsujihata et al.
patent: 3824387 (1974-07-01), Garst
patent: 3836834 (1974-09-01), Abbatiello et al.
patent: 4042809 (1977-08-01), Shetler
patent: 4053746 (1977-10-01), Braytenbah
patent: 4090065 (1978-05-01), Braytenbah
patent: 4158226 (1979-06-01), Struger et al.

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