US PATENT SUBCLASS 418 / 203
.~.~ Axially counterbalanced


Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

191  DF  INTERENGAGING ROTATING MEMBERS {9}
201.1  DF  .~ Helical or herringbone {4}
203.~.~ Axially counterbalanced


DEFINITION

Classification: 418/203

(under subclass 201.1) Apparatus in which the device is

provided with a means for applying an axial force to at least one of the members in opposition to an axial force produced by the member in the operation of the device.

(1) Note. It is not considered that thrust bearings or the like are force applying means for classification here. Such devices have been classified on other features.