US PATENT SUBCLASS 418 / 72
.~ With counterbalancing fluid passage through rotating member

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

71  DF  PRESSURE FLUID RADIALLY BALANCES WORKING OR ROTATING ABUTMENT MEMBER {3}
72.~ With counterbalancing fluid passage through rotating member

DEFINITION

Classification: 418/72

(under subclass 71) Apparatus in which the opposing fluid zones are spaced about the rotating member periphery and are inter-connected by passage means extending through the rotating member.