Pumps – Motor driven – Electric or magnetic motor
Patent
1983-01-28
1985-02-19
Croyle, Carlton R.
Pumps
Motor driven
Electric or magnetic motor
417488, 310 22, 310 35, 62 6, 92 98R, F04B 1704, H02K 3314, F01B 1900, F25B 900
Patent
active
045002657
ABSTRACT:
A vibration free fluid compressor particularly adapted for Stirling cycle cryogenic refrigeration apparatus comprising a pair of identical opposing ferromagnetic pistons (10, 12) located in a housing (22) and between a gas spring including a sealed volume (52, 54, 60) of a working fluid such as gas under pressure. The gas compresses and expands in accordance with movement of the pistons (10, 12) to generate a compression wave which can be vented out to other apparatus, for example, a displacer unit in a Stirling cycle engine. The pistons (10, 12) are urged outwardly due to the pressure of the gas; however, a fixed electromagnetic coil assembly (56), located in the housing adjacent the pistons, is periodically energized to produce a magnetic field which interlinks the pistons (10, 12) in such a fashion that the pistons are mutually attracted to one another. The mass of the pistons (10, 12) in conjunction with the compressed gas between them form a naturally resonant system which when the pistons are electromagnetically energized, produce an oscillating compression wave in the entrapped fluid medium.
REFERENCES:
patent: 2283886 (1942-05-01), Henkell
patent: 2612419 (1952-09-01), Reynolds
patent: 2685838 (1954-08-01), Weinfurt
patent: 3220201 (1965-11-01), Heuchling et al.
patent: 3841798 (1974-10-01), Rehfeld
patent: 3991585 (1976-11-01), Mulder
patent: 4010621 (1977-03-01), Raetz
patent: 4245869 (1981-01-01), Scheffer
patent: 4389849 (1983-06-01), Gasser et al.
Evans Jack
Studer Philip A.
Croyle Carlton R.
Manning John R.
Olds T.
Sandler Ronald F.
The United States of America as represented by the Administrator
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