Earth working – With actuator adapted to lift tool for transport on wheeled... – Tool swings about rock shaft axis
Reexamination Certificate
2006-12-14
2009-06-02
Will, Thomas B (Department: 3671)
Earth working
With actuator adapted to lift tool for transport on wheeled...
Tool swings about rock shaft axis
C172S311000, C172S322000
Reexamination Certificate
active
07540332
ABSTRACT:
A hydraulic control system for use with a farm implement is configured to move an implement frame between a first height corresponding to a planting position, a second height corresponding to a field transport position, a third height corresponding to a lock up position and a fourth height corresponding to a road transport position. At least one hydraulic cylinder is mounted to a rock shaft connected to the implement frame to move the implement frame between the first height, the second, the third height and the fourth height. At least one depth stop valve is in communication with the hydraulic cylinder. The depth stop valve includes a bypass configured to allow controlled movement of the hydraulic cylinder between the second position and the third positions.
REFERENCES:
patent: 3666284 (1972-05-01), Hunter et al.
patent: 3731749 (1973-05-01), Sullivan et al.
patent: 4086843 (1978-05-01), Lorimor
patent: 4151886 (1979-05-01), Boetto et al.
patent: 4317489 (1982-03-01), Steinbach
patent: 4344733 (1982-08-01), Hirsch
patent: 4641388 (1987-02-01), Bennett et al.
patent: 4738315 (1988-04-01), Kinzenbaw
patent: 5042589 (1991-08-01), Hundeby et al.
patent: 5152347 (1992-10-01), Miller
patent: 5348101 (1994-09-01), Fox et al.
patent: 5957218 (1999-09-01), Noonan et al.
patent: 6000315 (1999-12-01), Graham et al.
patent: 6035943 (2000-03-01), Gerein et al.
patent: 6068064 (2000-05-01), Bettin et al.
patent: 6076611 (2000-06-01), Rozendaal et al.
patent: 6131669 (2000-10-01), Friggstad et al.
patent: 6209657 (2001-04-01), Friggstad
patent: 6305478 (2001-10-01), Friggstad
patent: 6318477 (2001-11-01), Bettin
patent: 6786130 (2004-09-01), Steinlage et al.
patent: 2007/0023195 (2007-02-01), Peck et al.
Friggstad Terrance A.
Mayerle Dean J.
CNH Canada Ltd.
Henkel Rebecca
Troutman Matthew D
Will Thomas B
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