US PATENT SUBCLASS 418 / 71
PRESSURE FLUID RADIALLY BALANCES WORKING OR ROTATING ABUTMENT MEMBER

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

71PRESSURE FLUID RADIALLY BALANCES WORKING OR ROTATING ABUTMENT MEMBER {3}
72  DF  .~> With counterbalancing fluid passage through rotating member
73  DF  .~> Counterbalancing fluid directed to rotating member shaft bearing
74  DF  .~> Counterbalancing fluid directed to intertooth spaces or spaces between adjacent vanes

DEFINITION

Classification: 418/71

(under the class definition) Apparatus in which radial forces or bias acting on a rotating member periphery because of fluid pressure in a pressure area or zone comprising part of the working chamber is substantially counterbalanced by an opposing area or zone of substantially equal pressure acting either on the rotating member periphery or the mounting means therefor.

(1) Note. A counterbalancing zone or force may be in a resultant direction substantially opposite a resultant zone or force.

(2) Note. The mere filling of intervene or inter-tooth spaces which may also tend to counter-balance the radial forces caused by exhaust or inlet fluid pressure is not deemed proper for classification here; nor are opposing inlet or outlet zones, per se, considered proper for classification here. Such devices are classified on other features.