Variable displacement compressor

Details Variable displacement compressor Variable displacement compressor

1977-06-09

1978-08-22

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

74 60, 417270, F04B 112, F16H 2300

Patent

active

041085779

ABSTRACT:
A wobble plate compressor in which the output of the compressor is modulated in response to refrigeration requirements by varying the compressor piston displacement to match the cooling requirement. The compressor housing front end has an axial protruding integral tubular extension which supports one end of a drive shaft by means of a journal bearing supported in the tubular extension. A cup-shaped hydraulic modulating cylinder is located in an axial fixed relation on the drive shaft adjacent the front end cover such that a disc-shaped piston, mounted on an axially slidable sleeve surrounding the drive shaft, is telescopically received in the cylinder rearwardly facing open end so as to define with the cylinder an expansible hydraulic chamber. An axially extending recess in the shaft defines an open-ended passage providing hydraulic fluid flow communication between radial passage means in the housing front end and the expansible chamber.

REFERENCES:
patent: 2711135 (1955-06-01), Dunlap
patent: 2934234 (1960-12-01), Looms
patent: 2955475 (1960-10-01), Zubaty
patent: 3062020 (1962-11-01), Heidorn

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