Patent ID: 6058704
Filing Date: 2000-05-09
Classification: B60K

Abstract:
A hydrostatic transmission comprising a housing constituted by a case member and a cover member and where said case member and said cover member are disposed adjacent one another along a peripheral seam to define an internal chamber, and where the interior of said cover member is provided with mounting surfaces or downwardly extending bosses; said hydrostatic transmission comprising a radial piston pump and a radial piston motor together disposed within said internal chamber, and where said radial piston pump is fluidly coupled to said radial piston motor by a pintle-valve; an input drive-shaft rotatably supported in said housing by at least one bearing and operatively connected to a cylinder-barrel of said radial piston pump; an output drive-shaft rotatable supported in said housing by at least one bearing and operatively connected to a cylinder-barrel of said radial piston motor; respective cylinder-barrels of said radial piston pump and said radial piston motor having an array of cylinders each containing a piston and where the pistons in each of said cylinder-barrels are operatively connected to respective surrounding annular track-rings; a framework disposed within said internal chamber to which said pintle-valve and said track-rings are fastened to, said framework being fixedly secured to said mounting surfaces or downwardly extending bosses; wherein said motor track ring is supported by said housing only through said framework.