Dosing pump

Claim 1

A VARIABLE STROKE MECHANISM FOR A PISTON-OPERATION DOSING PUMP WITH ADJUSTABLE OUTPUT, SAID MECHANISM COMPRISING A DRIVEN CRANK SHAFT HAVING A SHIFT PORTION AND A CRANK PORTION FOR RECIPROCATING THE PISTON OF THE PUMP, AND ADJUSTMENT MEANS FOR VARYING THE EFFECTIVE ECCENTRICITY OF THE CRANK PORTION IN REFERENCE TO THE SHAFT PORTION TO CONTROL THE LENGTH OF THE STROKE OF THE PISTON, SAID ADJUSTMENT MEANS INCLUDING GUIDE TRACKS SUPPORTED BY THE SHAFT PORTION AND EXTENDING RADIALLY TO THE AXIS THEROF, SAID CRANK PORTION BEING SEPARATE FROM SAID SHAFT PORTION AND SLIDABLY GUIDED IN SAID GUIDE TRACKS TO VARY THE POSITION OF THE CRANK PORTION BETWEEN A POSITION OF MINIMUM ECCENTRICITY AND A POSITION OF MAXIMUM ECCENTRICITY, A CONTROL SPINDLE THREADED ON ONE END INTO SAID CRANK PORTION, ROTATION OF SAID SPINDLE DISPLACING SAID CRANK PORTION IN REFERENCE TO THE ROTATIONAL AXIS OF THE SHAFT PORTION, A PINION SECURED TO THE OTHER END OF SAID SPINDLE COAXIALLY THEREWITH, A PAIR OF BEVEL RINGS DISPOSED ON OPPOSITE SIDES OF SAID PINION AND ENGAGING THE TEETH THEREOF, SAID BEVEL RINGS BEING MOUNTED COAXIALLY WITH SAID SHAFT PORTION AND ROTATABLE INDEPENDENT OF EACH OTHER, RELATIVE ROTATION OF SAID BEVEL RINGS EFFECTING ROTATION OF SAID PINION AND CONTROL SPINDLE WHEREBY THE LENGTH OF THE PISTON STROKE, AND THUS THE OUTPUT OF THE PUMP, ARE CORRESPONDINGLY VARIED, THE ACTUATING MEANS ROTATING SAID BEVEL RINGS RELATIVE TO EACH OTHER, SAID ACTUATING MEANS INCLUDING A SECOND PAIR OF INDEPENDENTLY ROTATABLED BEVEL RINGS, COUPLING MEANS COUPLING ONE BEVEL RING OF THE FIRST PAIR WITH ONE BEVEL RING OF THE SECOND PAIR, AND DRIVE MEANS DRIVINGLY COUPLED WITH BOTH BEVEL RINGS OF THE SECOND PAIR FOR ROTATING THE SAME RELATIVE TO EACH OTHER, WHEREBY ROTATION OF SAID DRIVE MEANS IN EITHER DIRECTION EFFECTS A CORRESPONDING DIRECTIONALLY OPPOSED ROTATION OF THE BEVEL RINGS OF THE FIRST PAIR RELATIVE TO EACH.