US PATENT SUBCLASS 166 / 92.1
.~ Cap or head pivotably attached to tube or casing

Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
92.1.~ Cap or head pivotably attached to tube or casing

DEFINITION

Classification: 166/92.1

Cap or head pivotably attached to tube or casing:

(under subclass 75.11) Above ground apparatus comprising a cover or top plug type structure in which all, or a section, is hinged to a pipe or to a tubular member inserted in a well.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75.13, for well caps or casing heads of general utility which do not require the pivoting of the caps or heads.