Dual accumulator hydraulic flotation system for crop harvester

Details Dual accumulator hydraulic flotation system for crop harvester Dual accumulator hydraulic flotation system for crop harvester

1997-07-17

1999-10-12

Melius, Terry Lee

Harvesters

Motorized harvester

With condition-responsive operation

56DIG15, 60472, A01D 4106, A01D 4700

Patent

active

059640774

ABSTRACT:
The hydraulic flotation circuit for the header of a windrower or other harvester utilizes a pair of precharged gas accumulators that are always in open communication with the flotation cylinders of the circuit. One of the accumulators is set at a relatively high precharge pressure, while the other is set at a much lower precharge pressure. If the header chosen for attachment to the harvester is relatively heavy, the accumulator with the higher precharge pressure provides the flotation bias, while if the header is relatively light, the accumulator having the lower precharge pressure comes into play.

REFERENCES:
patent: 3717995 (1973-02-01), Case
patent: 4622803 (1986-11-01), Lech
patent: 5415586 (1995-05-01), Hanson et al.
Case IH Operators Manual for 8840 Windrower Tractor, Part No. 700 713 678 Rev. C, Front and Back Coversheets, Inside Front Coversheet, pp. I, 12-14 (1995).
Case IH Operators Manual for 8830 Windrower Tractor, Part No. 700 713 675 Rev. C, Front and Back Coversheets, Inside Front Coversheet, pp. I, 12-13 (1997).

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