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:
Mar. 04, 2003
Filed:
Mar. 28, 2002
Peter Boehland, Marbach, DE;
Robert Reitsam, Hallein, AT;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A geared pump, having a housing ( ), two gear wheels ( ) that are disposed in the housing and mesh with one another, and at least one groove ( ) that is embodied in the housing on the pressure side of the geared pump, cavitation damage at high rpm is to be avoided. To that end, it is provided that the groove has a first portion ( ), which extends from the pressure side, and in which the bottom of the groove ( ) has a slight spacing from the tips of the teeth ( ) of the gear wheel, and a second portion ( ), which adjoins the first portion and in which the bottom of the groove ( ) has a maximum spacing from the tooth tips that is greater than the spacing in the first portion, and the first portion extends over a smaller angular range (&agr;) than the second portion, and the groove extends over a total angular range (&agr;, &bgr;) that is somewhat greater than angular spacing between two teeth ( ).