Three-point hitch having flotation

Details Three-point hitch having flotation Three-point hitch having flotation

2004-01-14

2004-12-14

Pezzuto, Robert E (Department: 3671)

Earth working

Automatic power control

Draft responsive

C172S439000, C180S361000

Reexamination Certificate

active

06830110

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a tractor three-point hitch.
BACKGROUND OF THE INVENTION
A variety of different implements are compatible with common three-point hitching systems. Many implements, such as mower-conditioners, snow plows, etc. need flotation in addition to height control to insure good performance and prevent damage. Presently, flotation is not available in common three-point hitching systems and must be designed into the implement.
SUMMARY OF THE INVENTION
According to the present invention, there is provided an improved tractor three-point hitch.
An object of the invention is to provide a tractor three-point hitch arrangement which provides flotation.
A more specific object of the invention is to provide a three-point hitch arrangement which provides flotation and is achieved by making a relatively simple modification to a common three-point hitch arrangement.
Yet a more specific object of the invention is to provide a three-point hitch arrangement wherein drop links are formed of flotation cylinders which are either coupled to respective accumulators or are both coupled to the same accumulator.
These and other objects of the invention will become apparent from a reading of the ensuing description together with the appended drawings.


REFERENCES:
patent: 3623304 (1971-11-01), Molzahn
patent: 3717995 (1973-02-01), Case
patent: 4773666 (1988-09-01), Koberlein et al.
patent: 5190111 (1993-03-01), Young et al.
patent: 5234060 (1993-08-01), Carter
patent: 5964077 (1999-10-01), Guinn
patent: 6003455 (1999-12-01), Flamme et al.
patent: 6068063 (2000-05-01), Mayerle et al.
patent: 6131062 (2000-10-01), Nielsen
patent: 6196327 (2001-03-01), Patel et al.
patent: 6491129 (2002-12-01), Young et al.
patent: 6612375 (2003-09-01), Rogala

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