Patent ID: 8807972
Filing Date: 2014-08-19
Classification: F01C,F04C

Abstract:
1. A housingless positive displacement pump assembly comprising one or more vane or gerotor type housingless positive displacement pump units, the one or more pump units each comprising pump unit components, an exterior mounting flange exterior of one end of the pump assembly, and at least one retaining rod extending through axially aligned holes in the exterior mounting flange and the pump unit components to hold the pump unit components in stacked relation to one another and connect the pump assembly to the exterior mounting flange via a connection between an end of the retaining rod and the exterior mounting flange, wherein the at least one retaining rod comprises a single retaining rod that holds the pump unit components of a plurality of the pump units in stacked relation to one another and connects all of the pump units to the exterior mounting flange via the connection between the end of the single retaining rod and the exterior mounting flange.