US PATENT SUBCLASS 418 / 152
NON-METALLIC WORKING MEMBER, CYLINDER OR PARTITION


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

152NON-METALLIC WORKING MEMBER, CYLINDER OR PARTITION {1}
153  DF  .~> Resilient {1}


DEFINITION

Classification: 418/152

(under the class definition) Apparatus in which the working member, cylinder, vane or abutment is either made of or coated with a nonmetallic material.

(1) Note. A mere seal means made of nonmetallic material for the vane, abutment or working member is excluded here. See subclass 104 for such seals.