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:
Jan. 06, 2026
Filed:
Dec. 09, 2022
Schaeffler Technologies Ag & Co. KG, Herzogenaurach, DE;
Tobias Bauer, Achern, DE;
Ludwig Eisenbeis, Karlsruhe, DE;
Carsten Mayer, Lohr a. Main, DE;
Marco Grethel, Bühlertal, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
The hydraulic system () presented here advantageously makes it possible for the sump to be designed merely in the form of a dry sump () which does not contain a separate pump module with a dedicated drive motor for delivering the hydraulic medium. Rather, hydraulic medium is delivered from the dry sump () via the dry sump pump flow () into a high sump (), which is located above the dry sump (). It is thus possible for the dry sump () to be made much smaller than a conventional gearbox sump or an oil pan. At the same time, it is possible to avoid the situation where the presence of a pump module in the gearbox sump means that, rather than the level of hydraulic medium being able to be kept beneath all the rotating components, components rotate in the hydraulic medium. In comparison with known systems, the design of the hydraulic system () proposed here therefore avoids churning losses. At the same time, having a common drive shaft () enables the drive of the pump flows () to allow the corresponding pump module () to be easily controlled and to be of a simple construction.