US PATENT SUBCLASS 417 / 477.3
.~.~.~.~ Specific rollers or slides structure

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}
477.3.~.~.~.~ Specific rollers or slides structure {5}
477.4  DF  .~.~.~.~.~> Helical slide
477.5  DF  .~.~.~.~.~> Roller axes or slide contact surfaces at significant angle with drive axis
477.7  DF  .~.~.~.~.~> Biased rollers or slides
477.8  DF  .~.~.~.~.~> Adjustable rollers or slides
477.6  DF  .~.~.~.~.~> Positively driven rollers

DEFINITION

Classification: 417/477.3

Specific rollers or slides structure:

(under subclass 477.1) Apparatus wherein a significance is attributed to the rolling or sliding elements (e.g., a specified shape, a specified positional relation, or a specified material constituents). [figure]