Front fold planter lift and fold hydraulic control system

Planting – Drilling – Frame and planting-element arrangement

Reexamination Certificate

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Details

C111S053000, C111S200000, C111S900000, C172S001000, C172S311000, C172S776000

Reexamination Certificate

active

07469648

ABSTRACT:
A hydraulic control system for use with a front fold planter is configured to move the tool bar of the planter between a first height corresponding to a planting position, a second height corresponding to a field transport position and a third height corresponding to a road transport position. A first set of hydraulic cylinders is mounted to the tool bar for moving the frame between the first height, the second and the third height. A second set of hydraulic cylinders is mounted to the tool bar for moving the frame between the first height and the second height. The first and second set of cylinders are arranged in a master/slave relationship relative to each other and operable independent of each other.

REFERENCES:
patent: 3246569 (1966-04-01), Littwin
patent: 3347043 (1967-10-01), Freese
patent: 4413685 (1983-11-01), Gremelspacher et al.
patent: 6009354 (1999-12-01), Flamme et al.
patent: 6061617 (2000-05-01), Berger et al.
patent: 6292729 (2001-09-01), Falck et al.
patent: 6371214 (2002-04-01), Anwar et al.
patent: 6561076 (2003-05-01), Hou et al.
patent: 6808054 (2004-10-01), Hirt et al.
patent: 2005/0121878 (2005-06-01), Muldoon
patent: 3246569 (1984-06-01), None

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