Liquified gas dry-cleaning system with pressure vessel temperature compensating compressor

A pressure vessel for use in a liquified gas dry-cleaning system for containing items to be cleaned and a liquid bath derived from a liquifiable gas, comprising;

• a wall structure defining a cleaning chamber having an inlet through which liquified gas is introduced into the cleaning chamber and an output through which liquified gas is discharged from the cleaning chamber,
• a basket disposed within the cleaning chamber for containing items to be cleaned,
• a compressor for evacuating a gaseous form of the liquifiable gas released by the liquid bath during a cleaning operation,
• said compressor having a reciprocatable piston movable in successive expansion and compression strokes to evacuate and compress a gaseous form of the liquifiable gas from the cleaning chamber and to increase the temperature thereof as an incident to each compression stroke, and
• said compressor being mounted in direct contacting relation to the pressure vessel wall structure such that heat generated during operation of the compressor is directed to the cleaning chamber so that the effects of a temperature decrease within the pressure tank incident to the gaseous evacuation are minimized.