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:
Nov. 03, 2009
Filed:
Sep. 02, 2005
Christian Lorenz, Aalen-Unterrombach, DE;
Roland Zoelch, Jihlava, CZ;
Frank Schonder, Karlsruhe, DE;
Christian Lorenz, Aalen-Unterrombach, DE;
Roland Zoelch, Jihlava, CZ;
Frank Schonder, Karlsruhe, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for optimizing the friction, wear, and function of an injection-molded throttle valve unit, including a throttle valve housing and a throttle valve that can move in relation to it. The throttle valve housing is injection molded out of a first plastic material inside a first cavity, then transferred to a second cavity. Bearing bushes are inserted into the throttle valve housing to constitute a hard material on hard material friction pairing between the bearing bushes and the throttle valve housing; either the bearing bushes are inserted into the throttle valve housing in a non-rotating fashion and the valve shaft rotates in relation to the bearing bushes or the bearing bushes rotate in relation to the throttle valve housing. The moving throttle valve is injection molded from a second plastic material inside the second cavity. The bearing bushes are preferably manufactured out of a metallic material and remain dimensionally stable when subjected to the injection pressure.