US PATENT SUBCLASS 417 / 477.13
.~.~.~.~ Flexible tube without backing member

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
474  DF  .~ Elongated flexible chamber wall progressively deformed {2}
476  DF  .~.~ Deformation by rolling or sliding engagement member {1}
477.1  DF  .~.~.~ Plural spaced engagement members or member portions {6}
477.13.~.~.~.~ Flexible tube without backing member

DEFINITION

Classification: 417/477.13

Flexible tube without backing member:

(under subclass 477.1) Apparatus wherein the flexible member is a tube, and a portion of the tube which comes in contact with the rolling or sliding members does not have a backing member. [figure]