US PATENT SUBCLASS 425 / 51
.~.~ Expansible surface

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

28.1  DF  RESHAPING, RESIZING OR VULCANIZING MEANS FOR TIRE, TIRE TUBE, OR DRIVE BELT {9}
49  DF  .~ Internal mold, form or support for toroid {4}
51.~.~ Expansible surface {1}
52  DF  .~.~.~> Fluid pressure actuated diaphragm type {1}

DEFINITION

Classification: 425/51

(under subclass 49) Apparatus wherein the mold or form is capable of changing its size or dimension.

(1) Note. To be included herein the mold or form surface must change in size, not merely be designed for knockdown to facilitate insertion and removal.

SEE OR SEARCH CLASS

249, Static Molds,

65, and 178+ for expansible cores of general utility for static molds.

285, Pipe Joints or Couplings,

107, 196 and 338 for pipe joints having expansible or inflatable features; see the search notes thereunder.