US PATENT SUBCLASS 417 / 477.2
.~.~.~.~ Cassette

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}
477.2.~.~.~.~ Cassette

DEFINITION

Classification: 417/477.2

Cassette:

(under subclass 477.1) Apparatus wherein the flexible wall or interposed flexible member is contained in a housing; said housing is interchangeable with similar housings.

(1) Note. At least one housing is placed in a base unit in order to be activated by a drive. [figure]