Valve plate arrangement for hydrostatic piston machines
AssigneeKlockner-Werke AG
InventorsHans Warnke, Werner Boer
Life of this patent
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Abstract
An axial piston machine of the swash plate type includes a valve plate provided in a front face thereof with control openings which communicate at opposite ends through bores with the rear face of the valve plate. A plurality of shallow pockets, respectively forming hydrostatic bearings, are also provided in said front face, which communicate through connecting bores respectively with throttle bores, which in turn communicate at inner ends with respective control openings, and in which spring loaded throttle pins are arranged with small clearance for oscillating movement.
Claims7
In an axial piston machine of the swash plate type, a combination comprising a valve plate having a front face and a rear face, a pair of control openings in said front face and each having opposite ends;
- a plurality of bores providing communication between said opposite ends of said control openings and said rear face of said valve plate;
- a plurality of shallow pockets in said front face respectively forming hydrostatic bearings;
- a plurality of throttle bores having outer ends at the periphery of said valve plate and each communicating at an inner end with a respective control opening;
- a throttle pin arranged with small clearance in each of said throttle bores for oscillating movement;
- biasing means for each throttle pin for biasing the same in one direction of its oscillation;
- a housing surrounding said peripheral surface of said valve plate;
- closure means for closing the outer ends of each throttle bore, each of said closure means comprising a pin in the outer end of the respective throttle bore and having an outer end abutting onto a portion of said housing;
- and a plurality of connecting bores through said valve plate respectively providing communication between said pockets and said throttle bores in the region of the outer ends of the latter.
Dependencies are inferred from the claim text.