Variable capacity compressor

Details Variable capacity compressor Variable capacity compressor

1977-12-16

1979-12-11

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417269, F04B 114

Patent

active

041781350

ABSTRACT:
A controlled, variable displacement swash plate compressor is provided with means for controlling the capacity pivoting the swash plate about the drive shaft axis to vary the effective pumping capacity. The position of the swash plate with respect to the drive shaft axis is a function of the pressure maintained inside the crankcase, said position being a result of the various forces acting on the pistons, including the underside of the pistons where crankcase pressure is applied. A cam surface is provided to maintain a fixed top dead center position at all displacements, as well as an improved universal joint mechanism to anchor the swash plate against rotation.

REFERENCES:
patent: 2711135 (1955-06-01), Dunlap
patent: 2964234 (1960-12-01), Loomis
patent: 3861829 (1975-01-01), Roberts et al.

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