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:
Jul. 30, 1996
Filed:
Dec. 16, 1994
Franz Arbogast, Heidenheim, DE;
Peter Peiz, Heidenheim, DE;
J.M. Voith GmbH, Heidenheim, DE;
Abstract
The invention is directed to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear has radial apertures for the medium being pumped, and sealing elements radially movably disposed in an appropriate profile groove, and inserted in respective tooth heads of the ring gear, or in the tooth heads of the pinion. The sealing elements are able to slide on the opposite tooth heads of the pinion, or of the ring gear. The head shape of the sealing element and the shape of the tooth space bottom of the ring gear, or of the pinion, are configured such that the sealing element establishes a seal between the pressure space and the suction space in the area of dead center.