Pumps – Motor driven – Electric or magnetic motor
Patent
1974-05-08
1976-02-10
Vrablik, John J.
Pumps
Motor driven
Electric or magnetic motor
310 27, 417418, F04B 3504
Patent
active
039376001
ABSTRACT:
A compressor of the resonant type driven by an electrodynamic linear motor incorporates means to control the stroke and to improve the power factor. The spring-mass system of the compressor which is forced into vibration by the motor is arranged to have a selectively variable resonant frequency generally centered on the power line frequency. Means responsive to any overstroking are operative to vary the natural frequency of the spring-mass system, for example by varying the stiffness of the spring means, so as to oppose further overstroking and maintain a high power factor.
REFERENCES:
patent: 2721453 (1955-10-01), Reutter
patent: 2988264 (1961-06-01), Reutter
Claeys Joseph V.
Helzer Charles W.
Mechanical Technology Incorporated
Sessions O. T.
Vrablik John J.
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