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Class Information
Number: 74/732.1
Name: Machine element or mechanism > Gearing > With fluid drive > With one or more controllers for gearing, fluid drive, or clutch
Description: Subject matter wherein means is provided to regulate the operation of the gearing or fluid drive; or to regulate the operation of a clutch.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7412913 |
Apparatus for driving an oil pump for automatic transmission |
Aug. 19, 2008 |
| 7377373 |
Hydraulic control apparatus for hydraulic power transmission with lock-up clutch |
May. 27, 2008 |
| 7351176 |
Line-to-lube pressure regulator valve assembly |
Apr. 1, 2008 |
| 7252020 |
Vehicle drive-train including a clutchless transmission, and method of operation |
Aug. 7, 2007 |
| 7188697 |
Power unit for vehicle with internal combustion engine |
Mar. 13, 2007 |
| 7171870 |
Geared fluid drive with parallel start-up capability |
Feb. 6, 2007 |
| 6939261 |
Compact vehicle transmission |
Sep. 6, 2005 |
| 6810772 |
Automatic transmission |
Nov. 2, 2004 |
| 6782984 |
Control method for lockup clutch |
Aug. 31, 2004 |
| 6732601 |
Control apparatus of an automated manual transmission |
May. 11, 2004 |
| 6648795 |
Transmission system for vehicle |
Nov. 18, 2003 |
| 6484607 |
All-terrain saddle type vehicle |
Nov. 26, 2002 |
| 6450912 |
Hydromechanical transmission having a continuously variable transmission ratio |
Sep. 17, 2002 |
| 6443275 |
Power transmission apparatus for a vehicle |
Sep. 3, 2002 |
| 6397703 |
Clutch control apparatus for continuously variable transmission |
Jun. 4, 2002 |
| 6269293 |
Interactive engine and automatic transmission control |
Jul. 31, 2001 |
| 6155946 |
Hydrodynamic clutch device with a transmission |
Dec. 5, 2000 |
| 6106427 |
Continuously variable transmission |
Aug. 22, 2000 |
| 6087945 |
Pump failure alarm system for hydraulic working machine |
Jul. 11, 2000 |
| 6080074 |
Process for precise adjustment of a hydrostatic and mechanical torque division gearing |
Jun. 27, 2000 |
| 6067878 |
System and method for restricting gear shift operation in timber harvesting tractors |
May. 30, 2000 |
| 6056657 |
Control strategy for optimizing multi-range hydro-mechanical transmission |
May. 2, 2000 |
| 5848952 |
Gear dependent manual modulation transmission control strategy |
Dec. 15, 1998 |
| 5701982 |
Lockup control system for automatic transmission |
Dec. 30, 1997 |
| 5678469 |
Creeper drive system |
Oct. 21, 1997 |
| 5673775 |
Lock-up control device for lock-up type torque converter and multi-stage hydraulic pressure control device suitable for the lock-up control device |
Oct. 7, 1997 |
| 5669473 |
Hydraulic control with line pressure modulation |
Sep. 23, 1997 |
| 5598906 |
Fluid coupling control device of automatic transmission |
Feb. 4, 1997 |
| 5584214 |
Transmission having a static, hydraulic continuously-variable-speed transmission mechanism |
Dec. 17, 1996 |
| 5540299 |
System for driving an automotive vehicle |
Jul. 30, 1996 |
| 5507372 |
Torque converter slip rate-based torque converter lock-up strategy |
Apr. 16, 1996 |
| 5492034 |
Twin countershaft transmission and improved power take-off arrangement therefor |
Feb. 20, 1996 |
| 5372226 |
System for preventing inadvertent application of torque converter lock-up clutch |
Dec. 13, 1994 |
| 5367922 |
Hydraulic control system for an automatic transmission having an R-N-D control valve |
Nov. 29, 1994 |
| 5305862 |
Control device for a frictionally engaging clutch for a hydrodynamic torque converter |
Apr. 26, 1994 |
| 5211080 |
Method of shift control during a coastdown shift for an electronic automatic transmission system |
May. 18, 1993 |
| 5193416 |
Mechanical-hydraulic transmission gear system and method of controlling power transmission using the system |
Mar. 16, 1993 |
| 5113343 |
Sequenced control of double transition powered downshifting in an automatic transmission |
May. 12, 1992 |
| 5030179 |
Discrete-ratio transmissions |
Jul. 9, 1991 |
| 5014573 |
Double transition upshift control in an automatic transmission |
May. 14, 1991 |
| 5000277 |
Hydrostatic steering control for a tracked vehicle |
Mar. 19, 1991 |
| 4934207 |
Hydraulically operated transmission with reverse torque limiter |
Jun. 19, 1990 |
| 4901597 |
Continuously variable automotive transmission |
Feb. 20, 1990 |
| 4887984 |
Marine transmission with fluid coupler |
Dec. 19, 1989 |
| 4883151 |
Transmission brake |
Nov. 28, 1989 |
| 4852427 |
Transmission |
Aug. 1, 1989 |
| 4772247 |
Integrated fixed drive belt sheaves for a continually variable transmission |
Sep. 20, 1988 |
| 4662243 |
Power transmission apparatus with two-phase type torque converter |
May. 5, 1987 |
| 4631980 |
Hydraulic circuit construction for a tractor having a hydraulic stepless change speed apparatus |
Dec. 30, 1986 |
| 4583426 |
Continuous torque transmission with manual transmission and converter |
Apr. 22, 1986 |
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