Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1978-02-03
1980-05-06
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 26, F04B 4900
Patent
active
042015170
ABSTRACT:
An automatic control selector responds to demand conditions to select the proper control mode for a compressor system that includes a compressor operable in a plurality of control modes for alternately controlling the compressor according to the demand conditions on the system. Upon the detection of heavy demand conditions and upon the detection of light demand conditions, the automatic control selector automatically switches the system into an appropriate control mode.
REFERENCES:
patent: 2589006 (1952-03-01), Yerger
patent: 3602610 (1971-08-01), Bloom
patent: 3860363 (1975-01-01), Silvern
patent: 4149827 (1979-04-01), Hoffmann
Crowder, Jr. Albert M.
Freeh William L.
Wilder Robert V.
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