Patent ID: 7681487
Filing Date: 2010-03-23
Classification: F04B,F16D

Abstract:
1. A hydraulic machine comprising a housing and at at least first and second hydraulic units, each unit comprising a cylinder block located in the housing having pistons, a shaft in rotational engagement with the cylinder block, and feed and exhaust ports for fluid exchange; said shafts being arranged coaxially and being coupled by corresponding male and female splined end portions thereof engaged one in the other so that said shafts rotate together, the machine further comprising bearings for supporting the shafts in the housing, said bearings comprising first and second bearings for respectively supporting the shafts at portions thereof located on the other sides of the cylinder blocks with respect to said splined end portions, wherein the bearings further comprise a single third bearing at the overlap section of the splined end portions of the shafts, which engages one of the shafts at least at the overlap section of the splined end portion thereof supporting the shafts between said cylinder blocks, the feed and exhaust ports of one of said units being disposed radially around said third bearing.