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. 21, 2026
Filed:
Jul. 26, 2024
GM Global Technology Operations Llc, Detroit, MI (US);
Zachary Juday, West Bloomfield, MI (US);
Mark R. Claywell, Birmingham, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A lubrication system includes a heat exchanger having an inlet and an outlet, a gearbox lubrication circuit fluidly connecting a gearbox between the inlet and the outlet of the heat exchanger, a stator lubrication circuit fluidly connecting a stator between the inlet and the outlet of the heat exchanger, and a rotor lubrication circuit fluidly connecting a rotor between the inlet and the outlet of the heat exchanger. The rotor lubrication circuit includes a rotor circuit mechanical valve located upstream of an inlet to the rotor and downstream of the outlet of the heat exchanger. Also, the rotor circuit mechanical valve is configured to move from a closed position to an open position when a pressure immediately upstream of the rotor circuit mechanical valve reaches a rotor circuit mechanical valve cracking pressure.