Patent ID: 7841216

Claim:
A dry cleaning machine comprising: a fluid tight pressure vessel defined by a treatment compartment housing that defines a treatment compartment; and a driving unit compartment housing that defines a driving unit compartment configured to withstand high pressure associated with the use of densified liquid state treatment gas, wherein the driving unit compartment housing is connected to the treatment compartment housing, and the driving unit compartment and the treatment compartment are in fluid communication and have essentially the same pressure, wherein the treatment compartment housing includes a transmission opening through which a transmission arrangement extends such that a driving unit projects from the transmission opening and a wall of the treatment compartment housing, wherein the transmission opening is positioned above a maximal liquid level of the dry cleaning machine and configured such that gas flow is permitted through the transmission opening but liquid flow is not permitted through the transmission opening, and wherein the driving unit compartment housing can be removable from the treatment compartment housing to access the driving unit compartment from outside the treatment compartment without having access to the treatment compartment.