US PATENT SUBCLASS 404 / 130
.~.~ Shiftable or variable ballast

Current as of: June, 1999
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404 /   HD   ROAD STRUCTURE, PROCESS, OR APPARATUS

83  DF  APPARATUS {17}
122  DF  .~ Rotating drum, roller or tire {10}
130.~.~ Shiftable or variable ballast

DEFINITION

Classification: 404/130

(under subclass 122) Roller device provided with either (a) means to vary the effective weight of the roller on the surface or (b) allow the effective weight of the roller to shift according to roller position.

SEE OR SEARCH CLASS

172, Earth Working,

611, for earth working devices with weight means.