US PATENT SUBCLASS 166 / 95.1
.~ Central valve or closure and lateral port


Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
95.1.~ Central valve or closure and lateral port


DEFINITION

Classification: 166/95.1

Central valve or closure and lateral port:

(under subclass 75.11) Above ground apparatus comprising (a) a head for attachment to a casing or tubing and having a flow regulating device operating across a vertical passage in line with the casing or tubing and an opening for a pipe in the side wall of the head or (b) a cap for closing off the tubing or casing and an opening for a pipe in the side wall of the tubing casing or cap.

(1) Note. There must be some detail of the head or cap shown or claimed for classification in this subclass. A patent having mere conventional showing of the cap or head and claims drawn to other features is classifiable in subclass 75.11 or other appropriate subclasses.

(2) Note. A sole disclosed use as a well casing head of a structure comprising a valve and a lateral port for handling fluid to or from the well is enough to cause classification in Class 166.

SEE OR SEARCH THIS CLASS, SUBCLASS:

88.1+, for devices in which an inner member is anchored or sealed with respect to an outer pipe and there is a port in the outer pipe.