US PATENT SUBCLASS 418 / 168
.~.~.~.~ Cylinder periphery comprises alternate tooth and passage portions (e.g., cage type)

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

160  DF  MOVING CYLINDER {1}
161  DF  .~ Rotating {5}
164  DF  .~.~ Rotary internal reacting member {3}
166  DF  .~.~.~ Intermeshing peripheral surfaces {4}
168.~.~.~.~ Cylinder periphery comprises alternate tooth and passage portions (e.g., cage type) {1}
169  DF  .~.~.~.~.~> With filler element (e.g., crescent)

DEFINITION

Classification: 418/168

(under subclass 166) Apparatus in which the recessed portion of the cylinder comprises a through passage.