(under subclass 75.11) Above ground apparatus comprising a head, cap, or system of pipes attached to a well casing or tubing in combination with a means for regulating the flow of fluid by presenting a predetermined limitation to fluid movement.
(1) Note. All valves and pipes offer some restriction to flow; this subclass, however, is intended to take only those well devices which include means specially built to restrict flow and known to the art as "chokes" or "beans".
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
40+, for flow restrictors.
251, Valves and Valve Actuation,
117, and 118+ for fluid handling systems of general utility with valves and flow restrictors.
