Patent ID: 7794212
Filing Date: 2010-09-14
Classification: F04B,Y10T

Abstract:
1. An axial pump/compressor comprising: a pump housing, a drive shaft mounted within the pump housing, a first drive shaft bearing mounted at a drive shaft entrance end of the pump housing and a second drive shaft bearing at a distal end of the pump housing, the drive shaft supported by the first and second drive shaft bearings, a cylinder barrel having opposite ends and having a plurality of cylinders disposed therein, a piston slidably disposed within each cylinder for reciprocating movement defining an intake and output stroke, a port plate having inlet and outlet ports thereon, the inlet and outlet ports having a length with a beginning and an end mounted adjacent to one end of the cylinder barrel for providing fluid into and out of the cylinders, a wedge member mounted at the opposite end of the cylinder barrel between the first drive shaft bearing and the second drive shaft bearing and having an angled surface facing the pistons, the wedge member mounted in driving relationship with the pistons, with the drive shaft passing through the wedge member, the drive shaft providing rotative power to cause relative rotation between the cylinder barrel and the wedge member for reciprocating the pistons between top dead center and bottom dead center positions, the pistons drawing fluid into the cylinder through the inlet port during an intake stroke and discharging fluid through the outlet port during an output stroke, means for varying the quantity of fluid discharged by the pump/compressor comprising means for rotating the wedge member for adjusting the time of the beginning and end of the intake stroke with respect to the intake port so that the pistons begin to draw fluid from the inlet port at a location along the inlet port removed from the beginning of the inlet port, and for adjusting the time of the beginning and end of the output stroke so that the pistons begin to discharge fluid into the outlet port at a location along the outlet port removed from the beginning of the outlet port to adjust the quantity of fluid drawn in during the intake stroke and the amount of fluid discharged during the output stroke with the pistons maintaining a constant volumetric displacement during the intake strokes and output strokes regardless of the rotation of the wedge member.