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:
Dec. 30, 2025
Filed:
Jun. 24, 2022
Dana Tm4 Inc., Boucherville, CA;
Benoit Blanchard St-Jacques, Sainte-Julie, CA;
Hakim Nechadi, Montreal, CA;
Anthony Riendeau, Boucherville, CA;
DANA TM4 INC., Boucherville, CA;
Abstract
Systems and methods for a leak drainage system are herein described. The leak drainage system may be implemented in an electric motor comprising a first region cooled by a liquid, a seal separating the first region from a second region, wherein the liquid does not enter the second region when the seal is not degraded, and a drainage system configured to drain liquid leaking through the seal from the first region into the second region, the drainage system comprising a radially projecting annular lip with a first angled wall positioned on a rotor shaft and an annular depression in a motor static housing circumferentially surrounding the radially projecting annular lip.