Master/slave hydraulic system for farming implements

Details Master/slave hydraulic system for farming implements Master/slave hydraulic system for farming implements

A - Human Necessities

01

B

138/80.1

A01B 63/10 (2006.01)

Patent

CA 2015835

A master/slave hydraulic system is disclosed for raising and lowering a farming implement such as a cultivator. The system is provided with a system of check valves and a pressure reducing valve arranged such as to avoid rebound in the cylinder system. The chatter in the system on lowering of the implement is avoided by providing means to utilize the pressure generated by the weight of the implement in combination with the pilot pressure from the lower line. The system disclosed also secures the locking of the pressure insidethe system to prevent leaking through the control valve to the tank of the supply/discharge system by way of check valves in each of the two supply/discharge lines.

La présente invention porte sur un système hydraulique maître/esclave servant à soulever et à abaisser un accessoire de machine agricole tel qu'un cultivateur. Ce système est muni d'un ensemble de clapets de non-retour et d'un réducteur de pression disposés de manière à éviter tout rebondissement dans la batterie de cylindres. Le broutage du système lors de l'abaissement de cet accessoire est supprimé en utilisant, par d'autres moyens, la pression générée par le poids de l'accessoire en conjonction avec la pression de pilotage dans le circuit de commande inférieur. Le système divulgué assure également le maintien de la pression dans le système afin d'empêcher les fuites par la vanne de commande, en direction du réservoir du système d'alimentation/d'évacuation, via les clapets de non-retour de chacune des deux canalisations d'alimentation/d'évacuation.

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