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. 18, 2000
Filed:
Nov. 04, 1997
DaimlerChrysler AG, , DE;
Abstract
A spot weld joint of a balancing plate on the exterior side of a rotationally symmetrical, rotating hollow body such as a motor vehicle drive shaft. In order to also be able to balance thin-walled hollow bodies in a secure manner with respect to the process, as well as rapidly and durably in the case of different pairings of material of the hollow body and the balancing plate, the weld joint is constructed as an ultrasonic weld. The zone of thermal influence of the weld joint extends from the contact surface between the balancing plate and the hollow body maximally by approximately 0.3 mm, preferably approximately 0.1 to 0.15 mm, into the wall of the hollow body. Expediently, the zone of thermal influence extends deeper into the balancing plate than into the wall of the hollow body. Irrespective of the hollow shaft material--steel, aluminum or plastic--, the balancing plate may consist of a metal of high density, particularly of steel, brass or copper. In the case of fiber-reinforced hollow plastic shafts, the balancing body may also consist of plastic or of a metal strip coated with plastic on the contact side or of a sintered-together metal/plastic composite material.