US PATENT SUBCLASS 166 / 71
.~ With above ground casing sinking means

Current as of: June, 1999
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166 /   HD   WELLS

67  DF  WITH BELOW AND ABOVE GROUND MODIFICATION {6}
71.~ With above ground casing sinking means

DEFINITION

Classification: 166/71

(under subclass 67) Devices in which there is an anvil, weight, pushing or turning means for causing a well casing to sink in the earth.

SEE OR SEARCH CLASS

173, Tool Driving and Impacting, appropriate subclasses for devices which provide mechanical movement or blows to a work contacting element which effect alteration in the work.