The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1992
Filed:
Mar. 11, 1991
Franz Arbogast, Heidenheim, DE;
Peter Peiz, Heidenheim, DE;
J.M. Voith GmbH, , DE;
Abstract
A crescent-less internal gear pump. The internally geared wheel has a plurality of radial openings from its peripheral surface into the tooth gaps at the tooth base. The axial width of the pinion and/or the internally geared wheel is at least as great as the diameter of the rolling circle of the pinion. The filling of the inside of the pump through radial openings makes it possible to make the internally geared wheel as axially wide as the suction connection or as that part of the housing which receives the active gear parts participating in the formation of the delivery stream. It is possible to develop the axial width of the toothing considerably larger than the diameter of the rolling circle of the pinion. Complete filling of the tooth gaps with pressure fluid is assured without the occurrence of flow velocities at which the formation of noise or other disadvantages is to be expected. The pump can also be provided with two internally geared wheels arranged alongside each other.