Sickle knife with double overlapping out of phase sickles

Details Sickle knife with double overlapping out of phase sickles Sickle knife with double overlapping out of phase sickles

A - Human Necessities

01

D

A01D 34/13 (2006.01)

Patent

CA 2461790

A sickle knife system includes two superposed reciprocating sickles each co-operating the same fixed knife guards and each extending across the full width of the cutter bar. The guards have slots approximately twice the conventional height. The width of the sickle blades at the rear edge is similar to that of the guard near the rear of its cutting edge. The blades of the top sickle are sharpened to cut against the top surface of the slot and the blades of the bottom sickle are sharpened to cut against the bottom surface of the slot. The two sickles are run out of phase, preferably about 90 degrees, so that as a result, when one sickle is near the end of its stroke within the guard where it decelerates, stops, then accelerates in the opposite direction, the other sickle is starting its cut against the side surface of the next guard.

Dispositif de barre de coupe comprenant deux lames alternatives superposées, chacune actionnant en coopération les mêmes protège-lames fixes et longeant toute la largeur de la barre de coupe. Les protège-lames comportent des fentes d'une hauteur à peu près du double de la hauteur classique. La largeur des sections de coupe au rebord arrière est similaire à celle du protège-lame près de l'arrière de son bord de coupe. Les lames de la faucille supérieure sont aiguisées de manière à couper contre la surface supérieure de la fente, et celles de la faucille inférieure sont aiguisées de manière à couper contre la surface inférieure de la fente. Les deux faucilles sont actionnées de manière déphasée, de préférence à un angle d'environ 90 degrés, de telle sorte que lorsqu'une faucille arrive à la fin de sa course dans le protège-lame où elle ralentit, s'arrête et accélère dans la direction opposée, l'autre faucille commence à couper contre la surface du protège-lame suivant.

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