F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/69.1, 97/71.
F15B 21/00 (2006.01) A01B 19/10 (2006.01)
Patent
CA 1150137
ABSTRACT Hydraulic control apparatus for parallel-connected double-acting cylinders enables the associated pistons to extend and retract together substantially uniformly. Mounted in a soil working implement such as an agricultural cultivator having a spaced array of soil-working tools whose working position is controlled by parallel-connected cylinders, the hydraulic control apparatus enables substantially uniform depth of soil penetration by all the tools in the array. A flow control valve for each cylinder is connected in one of the hydraulic fluid connecting lines to the cylinder. The flow control valves for all the cylinders are oriented so that uniform extension or retraction, as the case may be, of the associated pistons is obtained. If both extension and retraction are to be controlled, a pair of flow control valves is provided for each cylinder, one controlling extension and the other retraction. The invention also includes an implement such as a soil-working implement provided with such hydraulic control apparatus.
371468
Degelman Industries Ltd.
Ridout & Maybee Llp
LandOfFree
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