Patent ID: 7299792

Claim:
A compressor comprising: a case presenting a compressor chamber and a transmission chamber; a rotatable impeller in the compressor chamber; a transmission operable to drivingly connect the impeller to a power source; a lubricant sump operable to contain lubricant therein, said lubricant sump being in fluid communication with the transmission chamber so as to permit exchange of lubricant between the transmission chamber and sump; a sump pump operable to cause the exchange of lubricant between the transmission chamber and sump when powered, said sump pump being powered by the transmission, said transmission chamber having a lubricant reservoir portion configured to hold a quantity of lubricant therein, at least part of the transmission being located in the transmission chamber but outside the lubricant reservoir portion thereof; and a lubrication pump operable to transfer lubricant in the lubricant reservoir portion of the transmission chamber to said at least part of the transmission, said lubrication pump being drivingly connected to the transmission so as to be powered thereby, and said sump pump being drivingly connected to the lubrication pump so as to be powered thereby.