US PATENT SUBCLASS 418 / 255
.~.~ Diametrically aligned

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

253  DF  INTERCONNECTED VANES {3}
254  DF  .~ Integrally connected {1}
255.~.~ Diametrically aligned

DEFINITION

Classification: 418/255

(under subclass 254) Apparatus in which each of two vanes lies in a common plane passing substantially through the center of the working member.