US PATENT SUBCLASS 92 / 103 M
.~.~.~.~ Metal diaphragm

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

89  DF  COLLAPSIBLE CHAMBER WALL PORTION (E.G., HINGED OR FLEXIBLE WALL) {1}
90  DF  .~ Wall portion formed of flexible material {5}
96  DF  .~.~ Diaphragm type {4}
103 R  DF  .~.~.~ Specific or diverse material (47) {3}
103 M.~.~.~.~ Metal diaphragm

Unofficial Alpha Subclasses: R F SD M

DEFINITION

Classification: 92/103

(under subclass 96) Apparatus in which the diaphragm is formed of (1) two or more different materials, (2) a single material which has been treated to provide portions of the diaphragm with specific properties which are different from the properties of another portion thereof or (3) claimed as of a specific material.

(1) Note. In part (3) the mere recitation that the diaphragm is formed for example of "flexible material", "rubber", "leather" or "plastic" is not considered a recitation of a specific material and is excluded from this subclass. However, specifying a kind of rubber or plastic is considered specific material for this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for a bellows type expansible chamber portion formed of a specific or diverse material. Note the Class Definition, Statement Relating To Placement Of Patents Involving Combination And Subcombination Subclasses, and the paragraph following the title in the schedule of this class.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a single or plural layer web or sheet which may be nominally claimed as a diaphragm, or which may be described as, or for use as, a diaphragm. Class 428 takes a named diaphragm where the claim is directed to no more than a single or plural layer stock material provided for therein. 442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),

59+, for fabric which is coated or impregnated and subclasses 181+ for a woven fabric which may be bonded to a second component.