Marker control valve

Details Marker control valve Marker control valve

1982-10-27

1984-12-18

Garrett, Robert E.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

91447, 91470, 251230, 13762414, 172128, 172130, F15B 1120

Patent

active

044884761

ABSTRACT:
A sequencing valve utilized with a tractor-propelled planter having two row arms which pivot downward to the ground in an alternating sequence as the planter changes directions in the field. The sequencing valve is connected with the conventional hydraulic system which raises and lowers the planter at the end of each row so as to automatically lower alternate marker arms. This is achieved by pressurizing opposite ends of the sequencing valve spool for longitudinal movement through a cam means, causing the spool to rotate during movement in one direction whereby alternating lowering of the planter arms is achieved each time the planter is hydraulically lowered to the ground.

REFERENCES:
patent: 3677348 (1972-07-01), Boetto et al.
patent: 3785391 (1974-01-01), Miller
patent: 4067394 (1978-01-01), Deckler
patent: 4341148 (1982-07-01), Kosarzecki

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Profile ID: LFUS-PAI-O-1983114