Patent ID: 7814813

Claim:
A hydrostatic-mechanical transmission comprising: a radial piston motor ( 1 ) having cylinders ( 4 ) and a crankshaft ( 2 ) which powers a drive output via at least one spur gear arrangement ( 7 , 8 ), the at least one spur gear arrangement ( 7 , 8 ) and the radial piston motor ( 1 ) being arranged in a transmission housing, wherein the transmission housing comprises at least first, second and third housing portions ( 5 , 6 , 15 ), the first housing portion ( 15 ) and the second housing portion ( 6 ) define a first space ( 21 ) in which the at least one spur gear arrangement ( 7 , 8 ) is located, and the cylinders ( 4 ) are mounted on a side of both the second housing portion ( 6 ) and the third housing portion ( 5 ), and the second housing portion ( 6 ) and the third housing portion ( 5 ) define a second space ( 22 ) in which the radial piston motor ( 1 ) is located such that the second housing portion ( 6 ) is adjacent both the spur gear arrangement ( 7 , 8 ) and the radial piston motor ( 1 ), and the third housing portion ( 5 ) is connected to a valve housing ( 19 ), and the valve housing ( 19 ) houses a flushing valve ( 35 ) through which the pressure medium flows from the radial piston motor ( 1 ), through a pressure medium return, into the second space ( 22 ).