Metering gear pump or segment, and metering gear pump assembly comprising a plurality of metering gear pumps or segments

摘要

A metering pump or segment, and a metering pump assembly comprising a plurality of the metering pumps or segments, are disclosed. The drive shaft assembly for driving the pump gears of each metering pump or segment is coaxially aligned with the longitudinal axis of the pump or segment, as is the fluid inlet. The single drive shaft assembly is utilized to drive all of the metering pumps or segments comprising the metering pump assembly, and the different metering pumps or segments are fluidically connected together by means of a common fluid passageway. In addition, the different metering pumps or segments can be interchanged or exchanged so as to permit different metered fluid output volumes to be outputted at different predetermined locations, and the dispensing volumes can also be added together.

主权项

1. A metering pump or segment, comprising:
a pump plate defined around an axis and having a central cavity defined therein; a drive shaft assembly disposed coaxially with respect to said axis of said pump plate, extending through said central cavity defined within said pump plate, and having a drive gear mounted upon said drive shaft assembly so as to be disposed within said pump plate; at least one pump gear disposed within said pump plate and engaged with said drive gear so as to be driven by said drive gear; a fluid inlet supply path disposed coaxially with respect to said drive shaft assembly and said pump plate for supplying a fluid into said metering pump along an annular flow path circumferentially surrounding, and in contact with, said drive gear mounted upon said drive shaft and an external peripheral portion of said drive shaft; and a metered output fluid flow from said metering pump.