Hydraulic holding cylinder for wing lift mechanism

Details Hydraulic holding cylinder for wing lift mechanism Hydraulic holding cylinder for wing lift mechanism

2006-07-11

2006-07-11

Stodola, Daniel P. (Department: 3679)

Earth working

Plural wheeled implements

Outrigged implement adjustable inwardly

C172S663000, C172S456000, C172S458000, C111S057000

Reexamination Certificate

active

07073604

ABSTRACT:
The transversely extending frame of a machine has a number of hingedly interconnected frame sections that may be raised and lowered by lift cylinders to convert the machine between a wide-spread working position and a folded-up transport position. Two lift cylinders for raising and lowering inner wing frame sections relative to the central main frame section are anchored at their inner ends to a hydraulically operated holding cylinder that effectively adjusts the positions of the anchor points of the lift cylinder in a lateral sense. Thus, when the holding cylinder is fully contracted, the inner wing frame sections may be lowered by their lift cylinders until the lift cylinders are fully extended, but the outer ends of the inner wing frame sections remain tilted upwardly to a certain extent. Thus, outer wing frame sections connected to the outer ends of the inner wing frame sections also remain slightly lifted off the ground until fully unfolded from the inner wing frame sections. Thereupon, the holding cylinder may be extended to gently lower all wing frame sections to the ground without damaging tools or mounting components for such tools.

REFERENCES:
patent: 4612997 (1986-09-01), Wilkins
patent: 4615397 (1986-10-01), Hastings
patent: 6092609 (2000-07-01), Jeffery et al.
patent: 6125775 (2000-10-01), Gust
patent: 6263977 (2001-07-01), Mayerle et al.
patent: 6561283 (2003-05-01), Hundeby
patent: 6761228 (2004-07-01), Dobson et al.

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