Patent ID: 6178746
Filing Date: 2001-01-30
Classification: B60K,B60Y,F16H

Abstract:
A hydrostatic transmission located within a chamber defined by a surrounding housing structure and comprising a hydraulic pump and at least one hydraulic motor fluidly coupled together;an input drive-shaft rotatably supported in said housing structure and drivingly connected to said hydraulic pump,said hydraulic pump having a first cylinder-barrel containing an array of radially arranged cylinders and a radial piston disposed in each of said radially arranged cylinders and where the stroking axes of the radial pistons all lie along a common plane normal to the rotational axis of said first cylinder-barrel;said at least one hydraulic motor having a second cylinder-barrel containing an array of axially arranged cylinders set equally spaced apart about a circle described by the stroking axes of axial pistons disposed in said axially arranged cylinders to lie radially within the radial outer dimension of said second cylinder-barrel such that the stroking axes of said axial pistons lie parallel to the rotational axis of said second cylinder-barrel; and wherein said plane containing the stroking axes of said radial pistons is disposed parallel to and offset from the rotational axis of said second cylinder-barrel.