Patent ID: 7278261
Filing Date: 2007-10-09
Classification: F16H

Abstract:
1. An end cap for a hydraulic pump unit, comprising: a first end, a second end formed parallel to and opposite the first end, a plurality of sides connecting the first and second ends, a first surface formed between the two ends and the sides and a second surface formed opposite to the first surface; a first porting system formed in the end cap and comprising a first pair of system ports for hydraulic communication with a first hydraulic pump mounted on the first surface and a first charge pump located on the second surface and a first pair of openings formed on the first end and in communication with the first pair of system ports; a second porting system formed in the end cap and comprising a second pair of system ports for hydraulic communication with a second hydraulic pump mounted on the first surface and a second charge pump located on the second surface and a second pair of openings formed on the second end and in communication with the second pair of system ports; a first inlet in fluid communication with the first porting system and a sump, and a second inlet in fluid communication with the second porting system and the sump; a first bypass valve located in the end cap and hydraulically connected to the first porting system; and a second bypass valve located in the end cap and hydraulically connected to the second porting system.