公开(公告)号：US06536115B2

公开(公告)日：2003-03-25

申请号：US09183507

申请日：1998-10-30

申请人： James Tabbi ,  John E. Bernacki ,  Christopher J. Hughson ,  James A. Herley

发明人： James Tabbi ,  John E. Bernacki ,  Christopher J. Hughson ,  James A. Herley

IPC分类号： B26B306

CPC分类号： B26B5/001

摘要： The present invention provides a knife with a replaceable blade which is spring-biased in the retracted position. The knife is designed such that the blade can only be extended by exerting a downward force and by turning the handle with respect to an inner housing. The handle has a tab affixed to the inside wall of the handle. The inner housing has an angled slot in its wall adapted to receive the tab. When the blade is fully retracted, the tab rests on the shoulder at the top of the inner housing. A straight downward pressure on the handle causes the tab to engage the shoulder and will not allow the blade to extend. When the handle is rotated, the tab enters the slot and the blade is forced downward. As this occurs, the blade extends through a slot at the bottom of a blade cover. When the blade is removed from the object to be cut, the spring forces the handle to move with respect to the inner housing and causes the blade to retract within the blade cover. The handle has a longitudinal axis which is between 1 degree and 35 degrees from the line perpendicular to the bottom surface of the blade cover. In this position, the operator holds the handle with his thumb and forefinger at the end of the handle opposite the blade.

摘要翻译： 本发明提供一种具有可更换刀片的刀片，该刀片在缩回位置被弹簧偏置。 刀被设计成使得刀片只能通过施加向下的力并且通过相对于内壳转动手柄而延伸。 手柄具有固定在手柄内壁上的突片。 内壳体在其壁中具有适于接收突片的成角度的槽。 当叶片完全缩回时，翼片搁置在内壳体顶部的肩部上。 手柄上的直接向下的压力使得突片接合肩部，并且不允许刀片延伸。 当手柄旋转时，卡舌进入插槽，刀片被强制向下。 当这种情况发生时，刀片延伸穿过刀片盖底部的槽。 当刀片从要切割的物体上移除时，弹簧迫使手柄相对于内壳移动并使刀片在刀片盖内缩回。 手柄具有与垂直于叶片盖的底表面的线在1度和35度之间的纵向轴线。 在这个位置上，操作者用拇指和食指在手柄的与刀片相对的末端处握住手柄。