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:
Jul. 14, 2015
Filed:
Jul. 07, 2011
Peter Solfrank, Frensdorf, DE;
Tobias Mederer, Schwanstetten, DE;
Peter Solfrank, Frensdorf, DE;
Tobias Mederer, Schwanstetten, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
An unbalanced shaft for compensating for inertial forces and/or mass moments of inertia of an internal combustion engine (), having an unbalanced portion (), the center of mass of which extends eccentric to the axis of rotation () of the unbalanced shaft () for generating the shaft imbalance (), a bearing portion () adjacent to the unbalanced portion, and a bearing race () joined thereto, the outer surface () of which serves as a race for the rolling elements of a roller bearing rotationally supporting the unbalanced shaft, and the inner surface () of which retracts radially relative to the outer circumscribed circle () of the unbalanced portion in a bearing circumference region running in the direction of the imbalance. In order to assemble the bearing race on the bearing portion, the following geometric relationships are provided: (i) d>d, (ii) e>½(d−d), (iii) e<½(d+d), where d=outer circumscribed circle diameter of the unbalanced portion and the bearing portion, d=inner diameter of the bearing race, and e=center point offset between dand d