Hydraulic lock for a flexible tool bar

Details Hydraulic lock for a flexible tool bar Hydraulic lock for a flexible tool bar

1988-01-29

1989-05-02

Johnson, Richard J.

Earth working

With ground support vertically adjustable relative to frame

Power operated adjustment

188300, 172316, 172311, 172776, A01B 7300

Patent

active

048259586

ABSTRACT:
A flexible tool bar apparatus including a first tool bar adapted to have earth working implements attached thereto and a second tool bar also adapted to have earth working implements attached thereto. Two tool bars are pivotally attached at the inner ends thereof. A hydraulic cylinder mechanism is operatively attached at one end thereof to the first tool bar and is operatively attached at the other end thereof to the second tool bar. A fluid device is provided for selectively supplying fluid under pressure to a hydraulic cylinder mechanism for causing the hydraulic cylinder mechanism to hold the tool bar from flexing. The tool bar can flex when the fluid pressure is released.

REFERENCES:
patent: 3905425 (1975-09-01), Jackson
patent: 4191280 (1980-03-01), Copperwheat
patent: 4484636 (1984-11-01), Hodgson
patent: 4534575 (1985-08-01), Grove
patent: 4561505 (1985-12-01), Williamson
patent: 4607708 (1986-08-01), Landphair
Copy of two photographs showing Rich Henry's Version of a Planter Tool Bar.

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