Tool bar

Details Tool bar Tool bar

1998-12-02

2000-07-04

Will, Thomas B.

Earth working

Plural relatively movable tools

Plural tool groups relatively vertically movable because of...

172311, 111 57, A01B 2300

Patent

active

060824670

ABSTRACT:
A tool bar comprising an elongated tongue having a forward end rotatably secured to the hitch of a tractor and having first and second horizontally disposed pivot pins secured to the rearward end thereof at the opposite sides thereof. The inner end of a first elongated tool bar section is pivotally secured to the first pivot pin and a second elongated tool bar section is pivotally secured to the second pivot pin. The pivotal connection between the tool bar sections and the rearward end of the tongue permits the tool bar sections to flex upwardly and downwardly. The construction of the pivotal connection between the tool bar sections and the tongue is such that a flex-row averaging phenomenon occurs to prevent engagement of the gauge wheels of row planter units mounted at the center of the tool bar when the tool bar sections are flexed downwardly with respect to one another and which prevents engagement of the seed boxes on the row planter units located at the center of the tool bar when the tool bar sections are flexed upwardly with respect to one another.

REFERENCES:
patent: 4058170 (1977-11-01), Ankenman et al.
patent: 4504076 (1985-03-01), Bedney
patent: 4582143 (1986-04-01), Pratt
patent: 4607708 (1986-08-01), Landphair et al.
patent: 4646851 (1987-03-01), Duello
patent: 4664202 (1987-05-01), Applequist et al.
patent: 4721167 (1988-01-01), Salley et al.
patent: 4723787 (1988-02-01), Hadley et al.
patent: 4825958 (1989-05-01), Kelderman
patent: 5232054 (1993-08-01), Van Blaricon et al.
patent: 5787988 (1998-08-01), Harlan et al.

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