Earth working – Plural wheeled implements – Outrigged implement adjustable inwardly
Reexamination Certificate
1999-05-13
2001-03-27
Batson, Victor (Department: 3671)
Earth working
Plural wheeled implements
Outrigged implement adjustable inwardly
C172S456000, C111S057000, C111S054000
Reexamination Certificate
active
06206105
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a folding tool bar and more particularly to a forwardly folding tool bar.
2. Description of the Related Art
Tool bars are commonly used in farming operations. The conventional tool bars normally consist of a transversely extending tool bar or frame member having a hitch secured thereto which extends forwardly therefrom for attachment to a prime mover. Attachments such as cultivators, planter units, stalk cutters, etc., are mounted on the tool bar to perform various farming operations. A major problem associated with conventional tool bars is that the working or field width thereof must be substantially reduced to enable the implement to be transported from one location to another. Many types of tool bars employ a center tool bar section having wing tool bar sections extending outwardly therefrom. In certain of the prior art tool bars, the wings are pivoted from a substantially horizontal working field position to an upright transport position. In most folding tool bars of this type, the upright position of the wings is not as stable as desired and may create undesirable stress on certain components of the tool bar.
A further problem associated with the conventional folding tool bars is that the wheels which support the tool bar interfere with the mounting of various attachments on the tool bar due to the location of the wheels on the tool bar. Yet another disadvantage of the conventional prior art tool bars is that they are not able to accept narrow row attachments. Yet another disadvantage of the conventional prior art tool bars is that they are difficult to move from the field position to the transport position and vice versa.
Applicant's earlier U.S. Pat. No. 5,113,956 solved many of the problems associated with the prior art, but this invention is believed to be an advance over the prior art and advance over applicant's earlier patent.
SUMMARY OF THE INVENTION
A forwardly folding tool bar is described which includes a center tool bar section which is disposed transversely to the direction of travel of the tool bar and which has a forward side, a rearward side, and opposite ends. An elongated tongue is secured to the center tool bar section and extends forwardly therefrom for connection to a prime mover. The elongated tongue is telescopic and may be moved between an extended position and a retracted position. First and second wing tool bar sections are pivotally secured to the center tool bar section at the opposite ends thereof and are pivotally movable between field and transport positions. Each of the first and second wing tool bar sections has a forward side, a rearward side, a first end and a second end. The first and second wing tool bar sections, when in their field position, are parallel to and aligned with the center tool bar section and having their first ends positioned adjacent the ends of the center tool bar section. The first and second wing tool bar sections, when in their said transport position, are positioned forwardly of the center tool bar section at the ends thereof and are generally parallel thereto with their forward sides facing generally rearwardly towards the center tool bar section. Hydraulic cylinders are provided for pivoting the first and second wing tool bar sections between their field and transport positions. A first linkage interconnects the center tool bar section with the first tool bar section for pivoting the first wing tool bar section approximately 180° as the first wing tool bar section is pivoted between its field and transport position. A second linkage interconnects the center tool bar section with the second wing tool bar section for pivoting the second wing tool bar section approximately 180° as the second wing tool bar section is pivoted between its field and transport positions.
It is therefore a principal object of the invention to provide an improved forwardly folding tool bar.
Still another object of the invention is to provide a forward folding tool bar including a center tool bar section and first and second wing tool bar sections at the outer ends of the center tool bar section with the first and second wing tool bar sections being pivotally moved approximately 180° when they are pivoted between their field and transport positions.
Still another object of the invention is to provide a forwardly folding tool bar which is adapted to accept narrow row attachments such as planter units or the like.
Still another object of the invention is to provide a forwardly folding tool bar which is quickly and easily moved from a working field position to a transport position and vice versa.
Still another object of the invention is to provide a forwardly folding tool bar which is economical of manufacture and durable in use.
These and other objects of the present invention will be obvious to those skilled in the art.
REFERENCES:
patent: 2912022 (1959-11-01), Ver Ploeg et al.
patent: 3568740 (1971-03-01), Speakman
patent: 4529040 (1985-07-01), Grollimund
patent: 4582143 (1986-04-01), Pratt
patent: 4646851 (1987-03-01), Duello
patent: 4721168 (1988-01-01), Kinzenbaw
patent: 5088563 (1992-02-01), Shidler
patent: 5113956 (1992-05-01), Friesen et al.
patent: 5346019 (1994-09-01), Kinzenbaw et al.
patent: 5429195 (1995-07-01), Turnis
patent: 5488996 (1996-02-01), Barry et al.
patent: 5647440 (1997-07-01), Barry et al.
White Brochure “6512/6515 White Planter”.
White Brochure “6500 Series Narrow Row, Narrow Transport, Wing Fold Frame”.
White Brochure “6500 Series Narrow Row Planters, Forward Fold”.
Batson Victor
Thomte Dennis L.
Zarley McKee Thomte Voorhees & Sease
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