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:
May. 29, 2012
Filed:
Mar. 31, 2010
Laurence Andrew Deutsch, Farmington Hills, MI (US);
Steven Gerald Thomas, Bloomfield Hills, MI (US);
Laurence Andrew Deutsch, Farmington Hills, MI (US);
Steven Gerald Thomas, Bloomfield Hills, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A lubrication system for transporting lubrication oil in an automatic transmission includes a radial lubrication passage opening at a hole in an outer peripheral surface of a shaft. The hole has a cross section that is elongated only along a first axis offset from a central axis the shaft so as to follow angular deformation caused by unidirectional torque applied to the shaft whereby stress produced around the hole by torque transmitted through the rotating shaft is reduced, thus minimizing fatigue and increasing a useful life of the automatic planetary transmission. Preferably cross sections of the radial passage taken sequentially along the transverse axis are elongated near outer peripheral surface of the shaft but become circular towards the central axis. With this arrangement stress produced around the hole by torque transmitted through the rotating shaft is reduced thus reducing fatigue and increasing a useful life of the transmission.