Tractor having a high speed shift device
AssigneeNew Holland North America, Inc.
InventorEmiliano Brancolini
Life of this patent
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Abstract
A tractor includes a frame, an engine, a transmission for selecting a number of vehicle speeds, and a device for transmitting power from the engine to a PTO mechanism. The tractor has a mechanism forming part of the device by which the tractor speed can be selected to be higher than any speed selectable by means of the transmission.
Claims8
In a tractor having a frame supported by ground-engaging wheels, an engine supported by said frame, a transmission with clutches, said transmission interconnecting said engine and said wheels and operable to select a number of vehicle speeds, and a device for transmitting power from said engine to a PTO mechanism, the improvement comprising:
- said device including a high speed mechanism that is capable of selecting a higher vehicle speed which is greater than any of said number of vehicle speeds selectable by said transmission;
- the connection of said high speed mechanism causing said transmission clutches to automatically disengage, but involving no other change in said transmission in order to select said higher vehicle speed;
- and
- an apparatus for switching from a PTO mode, wherein a shaft of said PTO mechanism rotates, to a full speed mode, wherein said shaft does not rotate, said PTO mechanism including first and second gears having a velocity ratio corresponding to said higher vehicle speed which are rotated when said full speed mode is selected.
Dependencies are inferred from the claim text.