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:
Apr. 12, 2016
Filed:
Jun. 27, 2012
Andreas Blechschmidt, Zella-Mehlis, DE;
Andreas Blechschmidt, Zella-Mehlis, DE;
NIDEC GPM GmbH, Auengrund OT Merbelsrod, DE;
Abstract
A gear ring pump includes a pump bearing arranged in the housing cover. A port support is mounted in the pump housing between the impeller set and the end wall of the working chamber in a movable manner towards the driveshaft such that the port support is prevented from rotating. The port support has a suction kidney and a pressure kidney which pass through the port support separately from each other across the entire width of the port support. The thickness of the port support approximately matches the thickness of the impeller set but can also project past the thickness of the impeller set by up to 20%. The thermal expansion coefficient of the port support is approximately 70% to 120% greater than the thermal expansion coefficient of the pump housing. The driveshaft which is rotationally fixed to the inner rotor does not protrude into the port support.