US PATENT SUBCLASS 92 / 46
.~.~ With nonmetallic portion

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

34  DF  BELLOWS TYPE EXPANSIBLE CHAMBER {10}
45  DF  .~ Superposed peripherally interconnected elements {1}
46.~.~ With nonmetallic portion

DEFINITION

Classification: 92/46

(under subclass 45) Apparatus in which a portion of the ring shaped elements or the means forming the connection between the elements include a nonmetallic material.