Back to results
US 6,183,229 B2Granted
Hydraulic apparatus
AssigneeLuK Getriebe-System GmbH
InventorOswald Friedmann
Life of this patent
Estimating the term…
Abstract
The invention is embodied in a hydraulic gear machine, such as for example a pump or motor, with at least one multistage pressure building slot in an axial plate of the housing. The slot is designed to facilitate a gradual rise of fluid pressure between the mating teeth of the gears and to reduce the noise being generated by the machine as a result of advancement of fluid from a suction inlet to an outlet for pressurized fluid.
Claims18
A hydraulic gear machine comprising a housing;
- a first toothed gear rotatably mounted in said housing;
- and a driven second toothed gear rotatably mounted in said housing and meshing with said first gear to jointly convey a fluid from the fluid-admitting inlet of said housing to an outlet for pressurized fluid provided in said housing, said housing having at least one pressure building slot for the fluid flowing from said inlet to said outlet, at least a portion of said at least one slot having a cross-sectional area which increases in the direction of fluid flow from said inlet to said outlet, wherein said slot has a plurality of successive sections, as seen in said direction, and the cross-sectional areas of said successive sections increase at different rates.
Dependencies are inferred from the claim text.