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:
Aug. 18, 1987
Filed:
Aug. 23, 1985
Gerhard Tebbe, Geldersheim, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
The torsional vibration damper for the drive line of a motor vehicle driven by an internal combustion engine comprises two main parts (1, 3) rotatable in relation to one another about a common rotation axis, which are rotationally elastically coupled with one another through at least one pair of springs (7, 9) arranged in series-connection with one another. A friction damper device (R.sub.2) stressable in the relative rotation of the main parts is connected in parallel with only one of the two springs (7, 9). A further friction damper device (R.sub.1) with a smaller friction torque can be connected additionally in parallel with the series-connection of the two springs (7, 9). In such a torsional vibration damper the friction damping is independent of the torque basic loading and essentially dependent only upon the torque vibration superimposed on this torque basic loading. In this way characteristic resonances of the drive line of a motor vehicle can be damped in a deliberate manner.