US PATENT SUBCLASS 418 / 61.3
.~.~.~ Rotor has one less lobe than cylinder (i.e., Gerotor type)

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

54  DF  WORKING MEMBER HAS PLANETARY OR PLANETATING MOVEMENT {6}
58  DF  .~ Plural working members or chambers {3}
61.1  DF  .~.~ Circumferentially spaced working chambers {2}
61.3.~.~.~ Rotor has one less lobe than cylinder (i.e., Gerotor type)

DEFINITION

Classification: 418/61.3

Rotor has one less lobe than cylinder (i.e., gerotor type):

(under subclass 61.1) Apparatus wherein the working member

has one lobe less than the number of working chambers.