Pumps – With signal – indicator – or inspection means
Patent
1980-04-17
1982-06-22
Croyle, Carlton R.
Pumps
With signal, indicator, or inspection means
417282, 417310, F04B 4902
Patent
active
043360017
ABSTRACT:
A solid state system for controlling a compressor or pump which is driven by a motor, the compressor being loaded or unloaded manually or automatically and proportionally to maintain a selected suction-pressure setpoint and to maintain the load on the drive motor within a motor-current setpoint limit, the system having start-up and shut-down sequences which have timed stages including a delay to permit the building up of oil pressure prior to loading of the compressor and including the automatic loading and unloading of the compressor incident to start-up and shut-down. The control includes monitoring of temperatures and pressures associated with the system and automatic shut-down in response to malfunctions internal to the system, and includes automatic shut-down in response to external malfunctions as selectable options, and further includes separate malfunction indicators with a circuit for providing their operability.
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patent: 4254370 (1981-03-01), Miller
Andrew Eduardo V.
Armstrong, Jr. Richard C.
Naunas, Jr. Robert A.
Croyle Carlton R.
Frick Company
Look Edward
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