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Class Information
Number: 180/233
Name: Motor vehicles > Having four wheels driven
Description: Vehicle provided with four wheels and means for driving each of the wheels.


Sub-classes under this class:

Class Number Class Name Patents
180/251 Including longitudinally extending, endless element for transmitting drive to wheels 35
180/242 Including pump and fluid motor, or generator and electric motor, for driving one or more wheels 204
180/245 Including separate mechanical assemblies for transmitting drive to each of two wheels at one end of vehicle 57
180/248 With differential means for driving two wheel sets at dissimilar speeds 480
180/247 With manually operated means for disengaging drive to one or more, but fewer than all, of the four wheels 488
180/244 With means for braking either (1) one or more driven wheels or (2) structure transmitting drive to wheel 116
180/234 With means for steering all driven wheels 61


Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
5038884 Dog clutch mechanism Aug. 13, 1991
5036939 Multiple axle drive vehicle with overrunning roller clutch hubs Aug. 6, 1991
5035158 Electric shift and transfer case apparatus with control system therefore Jul. 30, 1991
5033575 Electric control apparatus for transfer device in part-time four-wheel drive vehicle Jul. 23, 1991
5032995 Fail-safe driving torque distribution control system for 4WD vehicle Jul. 16, 1991
5020626 Power transmitting system for a four-wheel drive vehicle Jun. 4, 1991
5018596 Power transmitting system for a four-wheel drive vehicle May. 28, 1991
5014809 Driving torque distribution control system for 4WD vehicle May. 14, 1991
5012884 Antilock braking method and apparatus for a four-wheel drive vehicle May. 7, 1991
5010974 4WD vehicle with driving force distribution control Apr. 30, 1991
5005662 Power transmission system for a four-wheel drive vehicle Apr. 9, 1991
4995862 Interaxle transfer mechanism for four wheel drive vehicles Feb. 26, 1991
4991680 Control device of a remote free wheel hub mechanism Feb. 12, 1991
4991679 Four wheel-drive anti-locking braking Feb. 12, 1991
4989685 Automotive traction control system with feature of selecting wheel slippage indicative parameter depending upon vehicle speed Feb. 5, 1991
4987967 Method of controlling a four wheel drive vehicle Jan. 29, 1991
4986388 Driving force distribution control system for 4wd vehicle Jan. 22, 1991
4982808 Viscous shear coupling Jan. 8, 1991
4982348 Method for determining vehicle speed during acceleration of a four-wheel drive vehicle Jan. 1, 1991
4971400 Method and apparatus for traction control (ASR) Nov. 20, 1990
4969532 Central differential for a four-wheel drive motor vehicle Nov. 13, 1990
4967868 Drive arrangement for a four wheel drive vehicle Nov. 6, 1990
4967861 Central differential for a four-wheel drive motor vehicle Nov. 6, 1990
4966249 Active control for distributing driving force over four-wheels of four-wheel drive vehicle Oct. 30, 1990
4966250 Active driving force control for four-wheel drive vehicle Oct. 30, 1990
4962970 Anti-lock braking system Oct. 16, 1990
4953654 Vehicular differential limiting torque control system Sep. 4, 1990
4949594 Interaxle differential for full time all wheel drive system Aug. 21, 1990
4947325 Diagnostic system for rotational speed sensors in drive train of four wheels drive vehicle having central differential device Aug. 7, 1990
4938306 Four-wheel-drive vehicle having a torque transmission coupling for always transmitting the torque Jul. 3, 1990
4934497 Power transmission control system for an anti-skid brake system Jun. 19, 1990
4907672 Transmission for a four-wheel drive motor vehicle Mar. 13, 1990
4905808 Torque transmission device for a four-wheel drive vehicle Mar. 6, 1990
4903791 Frame crossbeam assembly for all-wheel drive vehicle Feb. 27, 1990
4903811 Transfer device for a four-wheel drive motor vehicle Feb. 27, 1990
4899859 Power transmission apparatus Feb. 13, 1990
4896738 Power transmitting system for a four-wheel drive vehicle Jan. 30, 1990
4895217 Drive system for two pairs of wheels Jan. 23, 1990
4890686 Drive mode selecting system for four-wheel-drive motor vehicle Jan. 2, 1990
4890685 Device for controlling driving force distribution in four-wheel drive vehicle Jan. 2, 1990
4887686 Working vehicle Dec. 19, 1989
4887689 Driving force distribution control system for 4WD vehicle Dec. 19, 1989
4885957 Disconnectable transmission assemblies Dec. 12, 1989
4886141 Four wheel drive vehicle Dec. 12, 1989
4884653 Method of controlling a four wheel drive vehicle Dec. 5, 1989
4880328 Drive engagement apparatus Nov. 14, 1989
4875698 Power transmitting system for a four-wheel drive vehicle Oct. 24, 1989
4874056 Driving force distribution control system for a 4 wheel drive vehicle Oct. 17, 1989
4872525 Drive system for a motor vehicle comprising means for permanently driving a first pair of wheels and automatically operable means for selectively driving a second pair of wheels Oct. 10, 1989
4871043 Four wheel-drive anti-locking braking Oct. 3, 1989

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