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:
Feb. 11, 2014
Filed:
Nov. 29, 2007
Steven G. Thomas, Bloomfield Hills, MI (US);
Andreas E. Perakes, Canton, MI (US);
Matthew D. Hammond, Dearborn, MI (US);
Steven A. Frait, Milan, MI (US);
Monica R. Degraffenreid, Milford, MI (US);
Gregory D. Goleski, Rochester Hills, MI (US);
Chip Hartinger, Farmington Hills, MI (US);
Jeffrey E. Maurer, Commerce, MI (US);
Steven G. Thomas, Bloomfield Hills, MI (US);
Andreas E. Perakes, Canton, MI (US);
Matthew D. Hammond, Dearborn, MI (US);
Steven A. Frait, Milan, MI (US);
Monica R. DeGraffenreid, Milford, MI (US);
Gregory D. Goleski, Rochester Hills, MI (US);
Chip Hartinger, Farmington Hills, MI (US);
Jeffrey E. Maurer, Commerce, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A motor vehicle powertrain includes a multiple speed transmission including a first lube circuit that supplies hydraulic lubricant to components of the transmission, a first oil sump, and a first pump driveably connected to an engine for supplying oil at a first pressure to the lube circuit, a transfer case including a first output, a second oil sump located in the transfer case, a second pump located in the transfer case and driveably connected to the first output, and a check valve for alternately opening and closing a connection between the first pump and the lube circuit and for opening and closing a connection between the second pump and the lube circuit in response to differential pressure between an outlet of the first pump and an outlet of the second pump.