Patent ID: 9028222
Filing Date: 2015-05-12
Classification: F04C

Abstract:
1. A variable output pump, comprising: a fluid input; a control stage pump with a first input portion and a first output portion, wherein the first input portion of the control stage pump is in fluid communication with the fluid input; a main stage pump with a second input portion and a second output portion, wherein the second input portion of the main stage pump is in fluid communication with the fluid input and the first output portion of the control stage pump; a differential linkage in mechanical communication with the control stage pump and the main stage pump; and a control valve arranged in serial fluid communication between the first output portion and the second input portion; wherein the control valve is configured for restricted fluid flow or non-restricted fluid flow; and wherein a volume of fluid flow through the control valve determines rotational speed of each of the control stage pump and the main stage pump via the differential linkage.