(under subclass 105) Devices including packers or plugs as defined in subclass 179.
(1) Note. Claims involving merely a pump carrying a packer or plug or expanding support and including the pump or pump barrel by name only are classified on the basis of the packing, plug or support structure rather than in this subclass, the pump or pump barrel being treated as a mere pipe unless disclosed as a portion of a central conduit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
101, for packers or plugs and pump or plunger means exerting outward pressure on the space below the packer or plug, which pressure may be alternated with an inward eduction flow.
SEE OR SEARCH CLASS
417, Pumps, appropriate subclasses for pumps combined with packers or plugs.
