US PATENT SUBCLASS 166 / 177.3
WIPER
Current as of: June, 1999
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DEFINITION
Classification: 166/177.3
Wiper:
(under the class definition) Apparatus having a means for cleaning the interior surface of a tubular well member.
(1) Note. For classification in this subclass as a wiper, a device must clearly be intended to function as removing detritus. An incidental wiping action of a device intended for some other use, such as a packer or plug, is not sufficient to cause classification here. Classification is then based on the other use or the characteristics of the packer or plug.
SEE OR SEARCH THIS CLASS, SUBCLASS:
153+, for pistons, fluid driven into the well, which wipe the walls of the surrounding conduit.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices,
172+, for a piston for an expansible chamber device, even though disclosed as a well plunger or swab.
