Compressor having a starting load reducing apparatus

Details Compressor having a starting load reducing apparatus Compressor having a starting load reducing apparatus

1981-11-03

1984-02-21

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

With condition responsive control of pump fluid valve

417 29, 417290, 417298, F04B 4906

Patent

active

044326980

ABSTRACT:
A compressor having a starting load reducing apparatus comprises a main compressor body for compressing gas obtained under suction from an intake chamber through an intake valve within a compression chamber, and ejecting the compressed gas through an outlet opening, a motor for driving the main compressor body, a switch for starting the motor by closing, a solenoid mechanism operated by the closing of the switch, for forcibly communicating the compression chamber with the intake chamber, to put the main compressor body into a non-compressing operational state, and a positive thermally sensitive resistor element connected at a stage before a coil of the solenoid mechanism. The solenoid mechanism operates after the switch is closed until the time when the resistance of the positive thermally sensitive resistor element reaches a predetermined resistance.

REFERENCES:
patent: 2256565 (1941-09-01), Mantle
patent: 2681177 (1954-06-01), Hartwell
patent: 2730296 (1956-01-01), Hartwell
patent: 3486080 (1969-12-01), Tillmann
patent: 3490683 (1970-01-01), Kocher
patent: 3794789 (1974-02-01), Bynum
patent: 4234904 (1980-11-01), Fahlesson
patent: 4320309 (1982-03-01), Griffiths et al.

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