Inventor
LITTLEFIELD JOSEPH R
US16 patents
Patents
16 patentsUS9840140B1Dec 12, 2017
Compound-power-split electrically variable transmissions with motor clutching devices
GM GLOBAL TECH OPERATIONS LLC27 citations93
US10300905B2May 28, 2019
Electric vehicle drive using combined differential and reduction gearing
GM GLOBAL TECH OPERATIONS LLC15 citations84
US10167906B2Jan 1, 2019
Clutch assembly having a hydraulically actuate piston and latching device
GM GLOBAL TECH OPERATIONS LLC8 citations84
US10036458B2Jul 31, 2018
Multi-axis final drive assembly
GM GLOBAL TECH OPERATIONS LLC7 citations83
US10982745B2Apr 20, 2021
Planetary differential drive system
GM GLOBAL TECH OPERATIONS LLC6 citations73
US10533640B2Jan 14, 2020
Two ratio electric drive unit
GM GLOBAL TECH OPERATIONS LLC5 citations72
US10247252B2Apr 2, 2019
Dog clutch for a vehicle transmission
GM GLOBAL TECH OPERATIONS LLC4 citations70
US10190643B2Jan 29, 2019
Synchronizer for radially applied dog clutch for a vehicle
GM GLOBAL TECH OPERATIONS LLC2 citations70
US10138947B2Nov 27, 2018
Radially applied dog clutch with bi-directional ratcheting for a vehicle transmission
GM GLOBAL TECH OPERATIONS LLC2 citations70
US11035448B2Jun 15, 2021
Multi-axis final drive assembly
GM GLOBAL TECH OPERATIONS LLC0 citations62
US10557536B2Feb 11, 2020
Multi-axis final drive assembly
GM GLOBAL TECH OPERATIONS LLC1 citations62
US10234019B2Mar 19, 2019
Planetary gear set bearing retainer
GM GLOBAL TECH OPERATIONS LLC1 citations62
US11383593B2Jul 12, 2022
Electric drive unit clutch
GM GLOBAL TECH OPERATIONS LLC0 citations51
US10697524B2Jun 30, 2020
Motor vehicle powertrain
GM GLOBAL TECH OPERATIONS LLC0 citations39
US10500938B2Dec 10, 2019
Motor vehicle powertrain
GM GLOBAL TECH OPERATIONS LLC0 citations39
US10124661B1Nov 13, 2018
Power-split hybrid powertrain
GM GLOBAL TECH OPERATIONS LLC0 citations39