Hydraulic machine having teeth formed by rollers
AssigneeDanfoss A/S
InventorsGunnar L. Hansen, Hans C. Petersen
Life of this patent
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Abstract
A hydraulic machine is disclosed, having an annular gear with internal teeth and a gearwheel with external teeth mounted eccentrically therein, the internal teeth comprising one more tooth than the external teeth and the teeth of at least one set of teeth being formed by rotatably mounted rollers. It is desirable in such a machine for the internal seal to be improved and wear to be reduced. To that end, each roller has in its surface at least three axially parallel recesses, in which the teeth of the other set of teeth engage.
Claims9
A hydraulic machine having an annular gear with a set of internal teeth and a gearwheel with a set of external teeth mounted eccentrically therein, the internal teeth having one more tooth than the external teeth, and the teeth of at least one set of teeth being formed by rotatably mounted rollers, and in which each roller has at least three axially parallel recesses in a surface of the roller in which the teeth of the other set of teeth engage, each recess being bounded by a surface corresponding to a part of a cylinder and the teeth of the other set have a continuous convex surface over the major portion of each tooth.
Dependencies are inferred from the claim text.