US PATENT SUBCLASS 152 / 4
.~.~ Cylinder and piston

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

1  DF  SPRING WHEELS {3}
2  DF  .~ With lubrication {2}
4.~.~ Cylinder and piston

DEFINITION

Classification: 152/4

The lubrication for the spring wheel is directed solely to cylinders and pistons therein.