US PATENT SUBCLASS 239 / 157
.~.~.~ Ground wheel operated pump

Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

146  DF  WITH MOBILE TANK-TYPE SUPPLY MEANS {9}
155  DF  .~ Operational means interconnected with ground traverse {1}
156  DF  .~.~ Ground wheel operated discharge means or controller {1}
157.~.~.~ Ground wheel operated pump {1}
158  DF  .~.~.~.~> Gas pressure pump

DEFINITION

Classification: 239/157

(under subclass 156) Apparatus in which the mechanism actuated by the ground contacting means is a device which moves to change the pressure acting with respect to the material in the tank to be sprayed.