US PATENT SUBCLASS 152 / 209.1
.~.~ Tread


Current as of: June, 1999
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152 /   HD   RESILIENT TIRES AND WHEELS

151  DF  TIRES, RESILIENT {14}
208  DF  .~ Anti-skid devices {8}
209.1.~.~ Tread {13}
209.2  DF  .~.~.~> For controlling noise by varying design cycle (e.g., specified pitch ratio, pitch sequence, etc.) {1}
209.4  DF  .~.~.~> Containing randomly dispersed short fibers or anti-skid granules
209.5  DF  .~.~.~> Having tread sections (e.g., base-cap, etc.) containing different specified physio-chemical properties (e.g., hysteresis, modulus, hardness, etc.) or compositions {2}
209.8  DF  .~.~.~> Having asymmetric tread pattern {1}
209.11  DF  .~.~.~> For sidewall-running tires (e.g., unicycle, motorcycle, bicycle, etc.)
209.12  DF  .~.~.~> Containing lugs having or appearing to have net to gross ratios of less than 35 percent (e.g., farm equipment, tractor tire, etc.) {1}
209.14  DF  .~.~.~> Having tire tread profile defined by diverse radii of curvature
209.15  DF  .~.~.~> Characterized by shape of upper surface of tread element (e.g., block with upper convex surface, etc.)
209.16  DF  .~.~.~> Having specified tread shoulder structure
209.17  DF  .~.~.~> Having isolated holes or suction cups
209.18  DF  .~.~.~> Having groove or sipe with specified dimension or structure therewithin {8}
209.28  DF  .~.~.~> Having directional two dimensional pattern (e.g., "v" shaped, etc.)
210  DF  .~.~.~> With embedded anti-skid elements {2}


DEFINITION

Classification: 152/209.1

Tread:

(under subclass 208) Devices wherein the tread of the tire constitutes the anti-skid device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324, 325, for cushion tires having recesses which are inherently anti-skid. Recesses in the tire tread, primarily to increase tire resilience, are in subclasses 324 and 325.

SEE OR SEARCH CLASS

D12, Transportation,

136, + for tire tread designs.