Earth working – With actuator adapted to lift tool for transport on wheeled...
Reexamination Certificate
2000-01-26
2001-11-27
Batson, Victor (Department: 3671)
Earth working
With actuator adapted to lift tool for transport on wheeled...
C111S059000
Reexamination Certificate
active
06321852
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is directed to an agricultural implement frame having a main frame and a carrier frame wherein the carrier frame can be pivoted into a longitudinal transport position or a transverse working position.
2. Description of the Prior Art
In recent years, the transverse working width of towed agricultural implements has increased so that the farmer can cover more area in a single pass. Although this increased transverse width has greatly increased farmer efficiency in field operations, it does present a problem in transporting the implement from one field to another, along roads and through fence gates. To overcome the transport problem, the implements need to be folded into a more compact transport configuration.
Most relevant here, some row crop planters have been marketed with agricultural implement frames comprising a carrier frame and a main frame. The carrier frame has a transverse working position and a longitudinal transport position. The carrier frame is lifted relative to the main frame from its transverse working position and pivoted into a longitudinal transport position. In one embodiment, the carrier frame is raised by a four bar linkage, see U.S. Pat. No. 4,721,168. In another embodiment, the carrier frame is lifted on a vertical post, see U.S. Pat. No. 5,346,019. In both of these embodiments, the lifting assembly, the four bar linkage and the post, are rotated together with the carrier frame to pivot the carrier frame relative to the main frame. In a similar vein, an Argentine inventor has manufactured a row crop planter in which the carrier frame is raised and lowered on a truck sliding along a ramp and rotating the ramp and truck together with the carrier frame.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an agricultural implement frame wherein the carrier frame is lifted and pivoted on a stationary mast that does not pivot with the carrier frame.
The agricultural implement frame comprises a main frame having ground engaging wheels, a mast extending upwardly from the main frame, a truck slidably mounted on the mast, and a carrier frame pivotally mounted to the truck. Two hydraulic lift cylinders are used to raise and lower the truck on the mast. A hydraulic pivot cylinder is used to pivot the carrier frame relative to the truck on a vertical pivot located on the truck. Rollers forming a bearing facilitates the sliding movement of the truck on the mast.
The carrier frame has a transverse working position and a longitudinal transport position. The truck, to which the frame is pivotally mounted, has a fully raised position, an intermediate raised position and a lowered position. To move the carrier frame from its transverse working position into its longitudinal transport position, the truck is raised lifting the carrier frame. The hydraulic lift cylinders are extended raising the truck through its intermediate raised position to its fully raised position. In its fully raised position the hydraulic pivot cylinder is extended pivoting the carrier frame into its longitudinal transport position. To place the carrier frame into its transverse working position the process is reversed with the carrier frame being pivoted and then lowered.
The carrier frame is raised into its intermediate raised position and held there when the carrier frame is lifted for turning at the end of a row. Mechanical or hydraulic stops may be used to limit the upward movement of the truck to its intermediate raised position during field operations.
REFERENCES:
patent: 3356301 (1967-12-01), Barber et al.
patent: 4117893 (1978-10-01), Kinzenbaw
patent: 4128131 (1978-12-01), Bucher et al.
patent: 4721168 (1988-01-01), Kinzenbaw
patent: 5113956 (1992-05-01), Friesen et al.
patent: 5232054 (1993-08-01), Van Blaricon et al.
patent: 5346019 (1994-09-01), Kinzenbaw et al.
patent: 5488996 (1996-02-01), Barry et al.
patent: 5579849 (1996-12-01), Houck
patent: 5647440 (1997-07-01), Barry et al.
patent: 5787988 (1998-08-01), Harlan et al.
patent: 6076613 (2000-06-01), Frasier
patent: 6082467 (2000-07-01), Friesen
patent: 6131669 (2000-10-01), Friggstad et al.
patent: 37 01 877 (1988-08-01), None
patent: 0465393 A1 (1991-06-01), None
patent: 36403 (1959-09-01), None
Translation of Argentine Patent Application referred to “A planter that incorporates a setting for raising and transporting row units, with uniform distribution of loads of units” applied by Elvio Antonio Forchino.
Batson Victor
Deere & Company
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