Obedient self-powered slave vehicles

• US 4,771,838 A
• Filed: 05/21/1987
• Issued: 09/20/1988
• Est. Priority Date: 05/21/1987
• Status: Expired due to Fees

• Current Assignee: George M. Ketcham
• Original Assignee: George M. Ketcham
• Inventors: Ketcham, George M.
• Primary Examiner(s): Pekar, John A.
• Application Number:
  US07/053,146
• Time in Patent Office: 488 Days
• Field of Search: 180/14.2, 180/14.6, 180/6.64, 180/6.3, 180/6.62
• US Class Current: 180/6.62
• CPC Class Codes: B62D 12/02 for vehicles operating in tandem
• CPC Class Codes: B62D 13/00 Steering specially adapted for trailers combined traction and steering hitches B60D
• CPC Class Codes: B62D 59/04 driven from propulsion unit on trailer

Abstract

An intelligent slave vehicle follows the movements of a master vehicle without imposing a requirement on the master vehicle to supply towing power for the slave vehicle, the slave vehicle being self powered and self controlling in dependence on movements of the master vehicle.

Claims

1. An obedient self-powered and self-controlling slave vehicle, comprising:

a body of said slave vehicle having a suspension and at least two ground engaging wheels;

a power supply mounted on said slave vehicle body;

separate independent drives to the respective said ground engaging wheels from said power supply;

controllable variable torque transmitting means interposed in each said independent drive and driven by said power supply;

actuator means fixably attached to said master vehicle and movable omni-directionally in unison therewith; and

,

control means carried by said slave vehicle and controlling said variable torque transmitting means, said control means being operatively associated with said actuator means and actuated by said actuator means for it to follow the omnidirectional movement of said actuator means, and thus movement of said master vehicle, in dependence on translational movements of said actuator means relative to a reference point on said slave vehicle, to provide for selective steering, acceleration and braking up of said slave vehicle duplicating movements of said master vehicle in the absence of a physical interconnection between said vehicles.

2. The vehicle of claim 1, in which said slave vehicle is a trailer and said master vehicle is an automobile preceeding said slave vehicle.

3. The vehicle according to claim 1, including a position indicating member mounted on said master vehicle, and control members of said control means operatively associated with said position indicating member for them to be moved by said position indicating member in direct relationship with movements of said master vehicle.

4. The vehicle of claim 3, in which said control members are axially movable members operatively connected to said respective control means, and said control members are each operative to exercise individual control of torque transmission to the respective individual wheels of said slave vehicle.

5. The vehicle of claim 4, in which said control members are rods operatively connected to operate said control means, and which are positionally moved by said position indicating member of said master vehicle.

6. The vehicle of claim 4, in which said control members are push/pull cables operatively connected to operate said control means, and which are operated by said position indicating member of said master vehicle in dependence on movements of said position indicating member.

7. The vehicle of claim 1, in which said power supply is connected to drive a single hydraulic pump, and said control means comprises independent hydraulic control valves interposed respectively in hydraulic supply lines from said hydraulic pump to independent hydraulic drive motors respectively connected to drive an associated one of said ground engaging wheels.

8. The vehicle of claim 7, in which said control means controls brakes for the associated hydraulic drive motor to prevent overspeeding of a said hydraulic drive motor and in turn apply a braking force to the associated wheel in the event of overspeeding of the associated ground wheel.

9. The vehicle of claim 7, including means for varying the power output of said engine and for varying the volumetric output of said pump in dependence on a sensed power requirement of said slave vehicle.

10. The vehicle of claim 1, in which said internal combustion engine is connected to drive plural hydraulic pumps respectively associated with hydraulic drive motors, respectively connected to drive an associated one of said ground engaging wheels.

11. The vehicle of claim 10, in which said respective hydraulic pumps provide brakes for the associated hydraulic drive motors to prevent overspeeding of said hydraulic drive motors in the event of overspeeding of the associated ground wheels.

12. The vehicle of claim 10, including means for varying the power output of said prime mover and for varying the volumetric output of said pumps in dependence on a sensed power requirement of said slave vehicle.

13. The vehicle of claim 10, in which said slave vehicle is a trailer vehicle, and said master vehicle is a similar trailer vehicle operating under the control of a master vehicle in order to provide a train of said vehicles, each of which is independently self-powered and self-controlling.

14. A self-poewred and self-controlling vehicle comprising:

a body comprising a slave vehicle having a suspension and at least two ground engaging wheels;

power supply means comprising at least one power supply mounted on said slave vehicle body;

separate independent drives to the respective said ground engaging wheels from said power supply means;

controllable variable torque transmitting means interposed in each said independent drive;

an actuator means fixidly attached to a master vehicle and movable omni-directionally in unison therewith; and

,

control means carried by said slave vehicle and controlling said variable torque transmitting means, said control means being operatively associated with said actuator means and actuated by said actuator means for it to follow the omnidirectional movement of said actuator means, and thus movement of said master vehicle, in dependence on translational movements of said actuator means relative to a reference point on said slave vehicle, to provide for selective steering, acceleration and braking of said slave vehicle duplicating movements of said master vehicle in the absence of a physical interconnection between said vehicles.

15. An obedient self-powered and self-controlling vehicle, comprising:

a body providing a slave vehicle having a suspension and at least two ground engaging wheels;

a power supply mounted on a master vehicle;

power transmitting means between the power supply on the master vehicle and the slave vehicle;

separate independent drives to the respective said ground engaging wheels;

controllable variable torque transmitting means interposed in each said independent drive and powered by said power supply and power transmitting means; and

,

control means carried by said slave vehicle and controlling said controllable variable torque transmitting means in dependence on translational movements of a reference point of a master vehicle with which said slave vehicle is associated.