Asymmetrical drive system

Details Asymmetrical drive system Asymmetrical drive system

1999-02-01

2001-06-12

Culbreth, Eric (Department: 3611)

Motor vehicles

Transmission mechanism

Gear transmission relationship to frame or axle

C056S229000, C074S60600R, C180S337000, C180S344000, C180S371000

Reexamination Certificate

active

06244370

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a drive system for wheeled vehicles more particularly, in the preferred embodiment, a commercial ride-on mid-mount deck lawnmower.
BACKGROUND OF THE INVENTION
Modern ground care equipment, whether they be walk behind or riding, typically have some sort of drive system extending from a source of power like a motor to the drivewheels—typically two in number on opposite lateral sides of a frame. The drive systems are functional in that they do transmit the power to the wheels, thus relieving the operator of the significant chore of physically manipulating the device around the lawn or grounds. The types of transmissions which accomplish this are normally single piece units having a single input drive shaft and a specially designed transmission casing interconnected to both axles—thus to provide the entire drive system in a single package. Other devices, typically in the more expensive commercial units, will have separate drive systems for each side of the device with these special drive systems specifically designed for the certain application. This typically necessitates having a systems specially designed for the right side of the device being distinct from that specially designed for the left side of the device. Alternately, some sort of complex direction or reversing mechanism has to be incorporated into either or both units or to the drive system which interconnects them both commonly to the engine. These special designs are expensive to design, manufacture, and repair. One reason for this is the effective dual inventory and/or high number of complex parts utilized in such systems.
OBJECTS AND SUMMARY OF THE INVENTION
It is an object of the present invention to reduce the cost of a drive system for grounds care equipment.
It is another object of the present invention to simplify the construction of drive systems.
It is yet another object of the present invention to reduce the physical size of drive systems.
It is still another object of the present invention to reduce the complexity of drive systems.
It is a further object of the present invention to lower the cost to build and to repair drive systems.


REFERENCES:
patent: 3854546 (1974-12-01), Andersson
patent: 4962821 (1990-10-01), Kim
patent: 5408896 (1995-04-01), Vogt

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