Positive displacement meter

Claim 1

A POSITIVE DISPLACEMENT ROTARY FLUID METERING APPARATUS COMPRISING: (A) A BODY HAVING A LUBRICANT SEALED, FLUID TRANSMITTING CHAMBER AND FLUID INFLUENT AND EFFLUENT OPENINGS COMMUNICATING WITH SAID CHAMBER; (B) FIRST AND SECOND SPACED APART SHAFTS JOURNALLED IN SAID BODY; (C) TIMING GEARS MOUNTED ON SAID SHAFTS; (D) A FLUID DRIVEN ROTOR HAVING VANES AND BEING MOUNTED SPACEDLY WITHIN SAID FLUID TRANSMITTING CHAMBER ON SAID FIRST SHAFT; (E) A ROTARY ABUTMENT MOUNTED SPACEDLY WITHIN SAID FLUID TRANSMITTING CHAMBER ON SAID SECOND SHAFT AND DRIVEN BY SAID ROTOR THROUGH SAID TIMING GEARS, SAID ROTARY ABUTMENT BEING SHAPED TO SPACEDLY RECEIVE WITH SAID VANES DURING ROTATION; (F) STATIONARY ABUTMENT MEANS MOUNTED IN SAID BODY WITHIN SAID ROTOR AND ADJACENT SAID ROTARY ABUTMENT TO MAINTAIN AT LEAST TWO AREA SEALS BETWEEN SAID INFLUENT AND EFFLUENT OPENINGS DURING ALL OPERATIVE POSITIONS OF SAID ROTOR AND SAID ROTARY ABUTMENT; AND (G) ADJUSTMENT MEANS MOUNTED CONCENTRICALLY ABOUT EACH OF SAID SHAFTS FOR SPACEDLY MAINTAINING SAID ROTOR AND SAID ROTARY ABUTMENT IN SAID FLUID TRANSMITTING CHAMBER WITHIN TOLERANCES SUFFICIENT TO PREVENT CONTACT BETWEEN THE MOVING AND STATIONARY PARTS AND TO PREVENT UNMETERED FLUID LEAKAGE BETWEEN SAID INFLUENT AND SAID EFFLUENT OPENINGS.