Pumping and metering device

Claim 1

IN COMBINATION, A PUMPING AND METERING DEVICE FOR DRAWING AGAINST AT LEAST 25" HG SUCTION AND METERING ACCURATELY CONTINUOUS FLOW RATES AS LOW AS .3 GALLON PER HOUR, COMPRISING A HOUSING HAVING AN INTERNAL CYLINDRICAL CAVITY, A PUMPING MEANS INCLUDING A GEAR SET CONSISTING OF OUTER AND INNER GEAR MEMBERS WITH SAID OUTER GEAR MEMBER HAVING A PLURALITY OF INTERNAL TEETH AND SAID INNER GEAR MEMBER HAVING A DIFFERENT PLURALITLY OF EXTERNAL TEETH PROGRESSIVELY ENGAGED WITH THE TEETH OF SAID OUTER GEAR MEMBER IN RESPONSE TO ROTATION RELATIVE EACH OTHER WITHIN THE CAVITY OF SOLELY DEFINE A PLURALITLY OF VARIABLE SIZED ROTATABLE LIQUID OIL PUMPING CHAMBERS, SHAFT MEANS TO SUPPORT THE INNER GEAR MEMBER ECCENTRICALLY OF THE OUTER GEAR MEMBER AND HOUSING CAVITY AND TO DRIVE THE GEAR SET WITHIN THE HOUSING, INLET AND OUTLET PORTING MEANS ADJACENT AND OPEN TO THE GEAR SET OPERABLE TO PROVIDE FOR FLUID TRANSFER THROUGH THE DEFINED PUMPING CHAMBERS, A METERING MEANS INCLUDING A CYLINDRICAL PERIPHERY ON THE OUTER GEAR MEMBER HAVING WHICH DEFINES WITHIN THE CAVITY ON ITS CYLINDRICAL PERIPHERY WHICH DEFINES WITHIN THE CAVITY AT LEAST ONE PERIPHERAL CHAMBER OF RELATIVELY SMALL FIXED VOLUME, A VANE OF WIDTH EQUAL TO THE AXIAL LENGTH OF THE DEFINED PERIPHERAL CHAMBER, MEANS FOR BIASING SAID VANE TO ENGAGE THE PERIPHERY OF THE OUTER GEAR MEMBER FOR SWEEPING THE PERIPHERAL CHAMBER OF FLUID UPON THE ROTATION OF THE OUTER GEAR MEMBER IN THE HOUSING, INLET AND OUTLET PORTING MEANS DISPOSED, RESPECTIVELY, ON OPPOSITE SIDES OF THE VANE EACH ADJACENT AND OPEN TO THE DEFINED PERIPHERAL FLUID CHAMBER OPERABLE UPON ROTATION OF THE