Inventor
VAHABZADEH HAMID
US34 patents
⚠️ This page may combine multiple inventors who share the name “VAHABZADEH HAMID”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GEN MOTORS CORP
19 patentsUS4644820AFeb 24, 1987
Geared-neutral continuously variable transmission
GEN MOTORS CORP82 citations94
US6287227B1Sep 11, 2001
Hydraulic control for a continuously variable transmission
GEN MOTORS CORP24 citations93
US5180340AJan 19, 1993
Guide mechanism for a traveling chain transmission
GEN MOTORS CORP29 citations92
US5046177ASep 3, 1991
Engine-CVT performance mode system
GEN MOTORS CORP22 citations92
US6637387B1Oct 28, 2003
Variable valve actuating mechanism with magnetorheological fluid lost motion device
GEN MOTORS CORP23 citations88
US5878832AMar 9, 1999
Steering apparatus for motor vehicle
GEN MOTORS CORP28 citations88
US5047937ASep 10, 1991
Engine CVT control system
GEN MOTORS CORP34 citations87
US7246673B2Jul 24, 2007
Hybrid powertrain with engine valve deactivation
GEN MOTORS CORP11 citations84
US5246406ASep 21, 1993
Torque transmission system for connecting parallel shafts
GEN MOTORS CORP11 citations74
US5234381AAug 10, 1993
Open-ended chain for a traveling chain transmission having reverse bend prevention
GEN MOTORS CORP8 citations74
US5201688AApr 13, 1993
Torque transmission system for connecting parallel shafts
GEN MOTORS CORP7 citations74
US4710879ADec 1, 1987
Ratio control system for a continuously variable transmission
GEN MOTORS CORP18 citations74
US4608031AAug 26, 1986
Control system for a continuously variable transmission
GEN MOTORS CORP10 citations74
US5234380AAug 10, 1993
Multi-speed torque transmission system for connecting parallel shafts
GEN MOTORS CORP3 citations63
US5180341AJan 19, 1993
Derailing mechanism for a traveling chain transmission
GEN MOTORS CORP4 citations63
US4747809AMay 31, 1988
Hydraulic control for a continuously variable transmission
GEN MOTORS CORP5 citations63
US4684358AAug 4, 1987
Continuously variable transmission and control
GEN MOTORS CORP4 citations63
US5762575AJun 9, 1998
Lock mechanism for a traveling chain
GEN MOTORS CORP5 citations62
US5857931AJan 12, 1999
Traveling chain derailer
GEN MOTORS CORP2 citations57
AVL POWERTRAIN ENGINEERING INC
5 patentsUS10955030B2Mar 23, 2021
Two-speed transmission for electric vehicle including a pair of mechanical diodes that are individually engaged to provide two gear ratios
AVL POWERTRAIN ENGINEERING INC6 citations84
US10208837B2Feb 19, 2019
Two-speed transmission for electric vehicle
AVL POWERTRAIN ENGINEERING INC7 citations84
US10711866B2Jul 14, 2020
Two-speed transmission for electric vehicle
AVL POWERTRAIN ENGINEERING INC2 citations73
US11346429B2May 31, 2022
Two-speed transmission for electric vehicle including a pair of mechanical diodes that are individually engaged to provide two gear ratios
AVL POWERTRAIN ENGINEERING INC0 citations62
US10012298B2Jul 3, 2018
Torque converter for manual transmission and method of controlling the same
AVL POWERTRAIN ENGINEERING INC0 citations42
GM GLOBAL TECH OPERATIONS INC
4 patentsUS7437963B2Oct 21, 2008
Power transmission
GM GLOBAL TECH OPERATIONS INC42 citations92
US7586083B2Sep 8, 2009
Laser sensor apparatus and method for detecting transmission shaft torque
GM GLOBAL TECH OPERATIONS INC8 citations79
US8037989B2Oct 18, 2011
Torque transmitting device actuation system using a piezoelectric pump
GM GLOBAL TECH OPERATIONS INC6 citations63
US7402124B2Jul 22, 2008
Control method and apparatus for a transmission clutch system
GM GLOBAL TECH OPERATIONS INC3 citations63