US PATENT SUBCLASS 188 / 250 R
.~ Shoes

Current as of: June, 1999
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188 /   HD   BRAKES

*  DD  ELEMENTS {6}
250 R.~ Shoes {12}
251 R  DF  .~.~> Composite {6}
260  DF  .~.~> Chills
261  DF  .~.~> Recessed
262  DF  .~.~> Rotary
250 A  DF  .~.~> Transversely expandable
250 H  DF  .~.~> One-piece
250 C  DF  .~.~> Multiple web
250 D  DF  .~.~> Web and flange connections
250 E  DF  .~.~> Slotted shoes and vibration dampers
250 F  DF  .~.~> Anchor and operator fittings
250 G  DF  .~.~> Surfaces and fasteners
250 B  DF  .~.~> Shoe construction

Unofficial Alpha Subclasses: R A H C D E F G B

DEFINITION

Classification: 188/250

The elements that come in contact with the body to be retarded.

(1) Note. Where the shoe or element is claimed with no significant shoe or element structure but merely in terms of the composition or material of which it is composed, it will be classified in the appropriate composition or material class, even though there is no claim to the composition, per se. In this connection, the following classes should be considered:

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, for articles defined solely by their metal or alloy composition.

106, Compositions: Coating or Plastic. Note particularly the class definition of Class 106 for the classification of other compositions.

148, Metal Treatment, particularly

31+, for materials which are products of processes of treating metal classifiable in Class 148, or for products distinguished only by the internal structure or characteristics of the metals, metallic compositions or alloys comprising such products.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclass, for methods of making laminated structures. 192, Clutches and Power-Stop Control,

107+, for the structure of a clutch component, per se.

252, Compositions, for compositions not elsewhere classified.

260, Chemistry of Carbon Compounds,

709+, for a composition containing rubber.

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 not elsewhere provided for, and especially

64.1+, for a circular sheet; subclasses 196+ and 225+ for such a product embodying mechanically interengaged strands (e.g., weave, knit); subclasses 364+ for a rod, strand, fiber or filament with structure (e.g., nonlinear) or coated; and subclasses 544+ for a web or sheet which is all metal or has adjacent metal components. See also (2) Note below.

520, Synthetic Resins or Natural Rubbers, appropriate subclasses, particularly Class 523,

152, for a composition containing a synthetic resin having utility as a friction element for automobiles, trains, trailers, roller skates, skateboards, or other wheeled vehicles or to processes of preparing said composition.

(2) Note. A patent directed to a product with a frictional property, where said property is enhanced by claimed structure (external structure (e.g., disc surface configuration)) or internal structure (e.g., discrete zones of friction material; particular arrangement of strands, fibers or layers), will be placed in this class (188) rather than in Class 428, Stock Material or Miscellaneous Articles, where the sole use disclosure is as a brake.