Patent ID: 9488261
Filing Date: 2016-11-08
CPC Classification: F16H

Claim Text:
1. A hydrostatic transmission comprising: an input shaft, wherein axial and radial directions of any component or portion in the hydrostatic transmission are defined to coincide to axial and radial directions of the input shaft; a plunger block fixed on the input shaft; pump plungers disposed in the plunger block; a pump swash plate disposed on one axial side of the plunger block so as to contact heads of the pump plungers projecting from the plunger block; a hydraulic motor driven by hydraulic fluid pressurized by the pump plungers rotating together with the plunger block and the input shaft; a lubricated object; and a lubricating fluid passage formed in the input shaft and having a pair of radially opposite lubricating fluid spill ports open at an outer peripheral surface of the input shaft, wherein both of the radially opposite lubricating fluid spill ports face the lubricated object, wherein the lubricating fluid passage includes an axial fluid passage extended axially and a pair of radial fluid passages extended radially from the axial fluid passage to the outer peripheral surface of the input shaft so as to be radially opposite each other, wherein open ends of the respective radial fluid passages at the outer peripheral surface of the input shaft serve as the respective radially opposite lubricating fluid spill ports, and wherein the radially opposite lubricating fluid spill ports are disposed at different axial positions.