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. 29, 2025
Filed:
Jun. 05, 2024
Schaeffler Technologies Ag & Co. KG, Herzogenaurach, DE;
Kenneth Hunt, Orrville, OH (US);
Matthew Fowler, Canton, OH (US);
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
A friction washer for a limited slip differential is provided, with the friction washer including a disk body having first and second opposing surfaces. The first and second opposing surfaces define respective first and second contact planes and include recesses that extend into the disk body from the respective first and second contact planes such that only a portion of the disk body extends to the respective first and second contact plane. The recesses are defined by partial spherical or partial cylindrical surfaces. This provides improved properties for holding lubricating fluid circulated within the differential so that the hydrodynamic pressure created between the friction surfaces provides a more consistent film or boundary layer of the lubricating fluid for a more uniform coefficient of friction over various operating speeds and pressures.