Claims
- 1. In a self-propelled agricultural machine such as a harvesting machine or the like having four wheels, a hydraulic motor for driving each wheel, a drive system for the wheel motors comprising a power source, and hydraulic pump means driven by said source for driving said hydraulic wheel motors, hydraulic line means including delivery and return lines for connecting the two wheel motors on one side of the machine in series with said pump means, and hydraulic line means including delivery and return lines for connecting the two wheel motors on the other side of the machine in series with said pump means; the improvement for use of the machine on a roadway, wherein said hydraulic pump means comprises a single pump driven by said power source, the hydraulic line means for the series connected wheel motors for each side of the machine being respectively connected in parallel to said pump, a shut off valve in the delivery and return lines for the wheel motors on one side of the machine for causing all of the fluid delivered by said pump to flow in series through the wheel motors on the other side of the machine, and means for mechanically declutching the wheels from their motors on the valved side of the machine when said valves are shut off for preventing liquid circulation through the motors on said one side of the machine, thereby causing all liquid circulated by said single pump to flow through the series connected motors on the other side of the machine for substantially doubling the speed of the machine along the roadway with a given pump output.
Parent Case Info
This is a continuation, of application Ser. No. 693,461 filed June 7, 1976 and now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1258284 |
Apr 1968 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
693461 |
Jun 1976 |
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