Positive displacement liquid meter

Claim 1

A POSITIVE DISPLACEMENT LIQUID METER COMPRISING A METER HOUSING DEFINING A GENERALLY CYLINDRICAL CHAMBER HAVING A GENERALLY CYLINDRICAL INTERNAL WALL WITH AT LEAST FIRST AND SECOND TRULY CYLINDRICAL SECTIONS DISPOSED AT OPPOSITE SIDES OF SAID CHAMBER, END COVER PLATED MATING AND SEALING WITH SAID HOUSING AT THE ENDS OF SAID CYLINDRICAL CHAMBER, INLET AND OUTLET PORTS DISPOSED ON OPPOSITE SIDES OF THE FIRST OF SAID WALL SECTIONS COMMUNICATING THROUGH SAID HOUSING WITH SAID CYLINDRICAL CHAMBER, A GERERALLY CYLINDRICAL ROTOR CAGE IN SAID CHAMBER HAVING A DIAMETER LESS THAN THAT OF SAID CHAMBER AND MOUNTED ON A CENTRAL SHAFT SUPPORTED ECCENTRICALLY IN SAID CHAMBER WITH THE CAGE SUBSTANTIALLY TANGENT TO THE FIRST OF SAID CYLINDRICAL WALL SECTIONS OF SAID CHAMBER AT A POINT SUBSTANTIALLY MIDWAY BETWEEN SAID INLET AND OUTLET PORTS, SAID CAGE HAVING A PLURALITY OF EQUALLY SPACED RADIAL SLOTS THEREIN, A FLAT BLADE SLIDABLY DISPOSED IN EACH OF SAID RADIAL SLOTS AND ADAPTED TO SLIDABLY SEAL WITH THE GENERALLY CYLINDRICAL WALL OF SAID CHAMBER, AT LEAST ONE OF SAID BLADES SEALING WITH EACH OF SAID CYLINDRICAL SECTIONS OF SAID HOUSING WALL CONTINUOUSLY, MEANS FOR PERMITTING THE ESCAPE OF LIQUID FROM THE DECREASING CHAMBER FORMED BY THE ROTOR CAGE AND THAT PORTION OF THE FIRST CYLINDRICAL INTERNAL WALL SECTION BETWEEN THE POINT OF TANGENCY OF SAID ROTOR WITH SAID WALL SECTION AND SAID OUTLET PORT AND A BLADE MOVING FROM SAID OUTLET PORT TOWARD SAID POINT OF TANGENCY DURING OPERATION OF THE METER, A CAM RING DISPOSED BETWEEN AN END OF SAID ROTOR CAGE AND THE ADJACENT END COVER PLATE WITH ITS AXIS CONCENTRIC WITH THE AXIS OF SAID CHAMBER, SAID CAM RING BEING ROTATABLY MOUNTED AND HAVING A CIRCULAR CAM GUIDED IN THE FORM OF AN ANNULAR GROOVE CONCENTRIC WITH THE AXIS OF SAID CAM RING, A LIKE CAM RING SIMILARLY DISPOSED BETWEEN THE OPPOSITE END OF SAID ROTOR CAGE AND THE ADJACENT END COVER PLATE, CAM FOLLOWERS PROJECTING LATERALLY FROM THE INNER RADIAL ENDS OF SAID BLADES ENGAGING THE ANNULAR GROOVES OF THE PROXIMATE CAM RINGS, AND REGISTER MEANS CONNECTED WITH SAID ROTOR CAGE FOR RECORDING THE ROTATION THEREOF.