Patent ID: 6427442
Filing Date: 2002-08-06
Classification: B60K,B60Y,F16H,Y10T

Abstract:
A hydrostatic transmission located within a chamber formed by a surrounding housing structure provided with an input power shaft connection and an output power shaft connection and comprising a hydraulic pump coupled to said input power shaft connection and a hydraulic motor coupled to said output power shaft connection; fluid coupling surfaces provided for said hydraulic pump and said hydraulic motor respectively and each fluid coupling surface having a pair of arcuate-shaped ports; fluid power transmitting passages for hydraulically linking said hydraulic pump and said hydraulic motor together by way of connection with said arcuate-shaped ports; said hydraulic pump having a swash-plate and an adjacently disposed cylinder barrel and where said cylinder barrel can be said to reside in alocation between said input power shaft connection on the one hand and said swash-plate on the other hand, said cylinder barrel being formed with first and second end faces and containing an array of generally axially arranged cylinders, a piston disposed in each cylinder and said each cylinder terminating in a port at the first end face of said cylinder barrel, the pistons protruding from said cylinders at the second end face of said cylinder barrel to operatively connect with said swash-plate; wherein the rotating axis of said hydraulic motor can be said to be disposed and offset with respect to that fluid coupling surface engaging said cylinder barrel on said piston side of said the first end face of said cylinder barrel.