Subsurface tubular flow control apparatus

Claim 1

IN VALVE APPARATUS: A HOUSING MEMBER HAVING A FLUID PASSAGE; A TUBULAR MEMBER IN SAID HOUSING MEMBER AND HAVING A FLUID PASSAGE COMMUNICABLE WITH SAID HOUSING MEMBER PASSAGE; SAID MEMBERS HAVING ATTACHMENT MEANS FOR SECURING SAID MEMBERS TO ADJACENT TUBULAR DEVICES ADAPTED TO EXTEND FROM SAID MEMBERS; SAID MEMBERS BEING ROTATABLE WITH RESPECT TO EACH OTHER; ONE OF SAID MEMBERS HAVING A VALVE SEAT; A VALVE HEAD; MEANS PIVOTALLY MOUNTING SAID VALVE HEAD ON SAID ONE MEMBER FOR MOVEMENT RELATIVE TO SAID SEAT; FIRST GEAR MEANS ON SAID VALVE HEAD; AND SECOND GEAR MEANS ON SAID OTHER OF SAID MEMBERS MESHABLE WITH SAID FIRST GEAR MEANS TO SHIFT SAID HEAD ALONG SAID SEAT BETWEEN OPEN AND CLOSED RELATION TO SAID SEAT IN RESPONSE TO RELATIVE ROTATION BETWEEN SAID MEMBERS; SAID TUBULAR MEMBER BEING SHIFTABLE LONGITUDINALLY RELATIVE TO AND WITHIN SAID HOUSING MEMBER TO EFFECT SELECTIVE MESHING OR DISENGAGEMENT BETWEEN SAID FIRST GEAR AND SECOND GEAR MEANS.