LUBRICATION OF SCREW MACHINES
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United States of America Patent
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Issued Date -
Feb 28, 2013
app pub date -
Feb 14, 2011
filing date -
Feb 12, 2010
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Abstract
A screw machine for use with a working fluid with a liquid phase present comprises rotors having meshed, lubricated helical formations. The rotors have an ‘N’ profile as disclosed in WO 97/43550. In use, lubrication of the helical formations of the rotors and optionally of the rotor bearings is achieved substantially exclusively with the liquid phase of the working fluid.
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