KNIFE Russian patent published in 2009 - IPC B26B1/08 

FIELD: mechanics.

SUBSTANCE: proposed knife comprises a blade, blade holder and working member moving along the former. A kinematic converter is arranged between the said working member and blade holder to cause additional relative motion of blade holder and working member irrespective of the blade holder pulled out position. The blade holder is articulated with the working member. The additional relative motion allows the separation of two coupling elements that links the working member and blade holder in the pull-out direction. The primary coupling element is formed by the free end of the rod fastened to the working member across the pull-out direction. The rod makes a bell-crank that forms a control arm directed backward along the withdrawal direction to get in contact via the blade body control surface, while the working member stays in its pulled back position in the withdrawal direction to turn the rod. It occurs so that the primary coupling element moves from its free position outside the trajectory of the secondary coupling element into the position allowing catching with the secondary coupling element.

EFFECT: expanded performances.

9 cl, 6 dwg