公开(公告)号：US3910017A

公开(公告)日：1975-10-07

申请号：US49233774

申请日：1974-07-26

申请人： TORO CO

发明人： THORUD RICHARD A ,  CHRISTOPHERSON HERMAN P

IPC分类号： A01D34/63 ,  A01D34/73 ,  A01D55/18

CPC分类号： A01D34/63 ,  A01D34/73 ,  A01D2101/00

摘要： An improved blade for rotary lawn mowers, having outward tips with longitudinally extending cutting edges and a central portion with lateral flanges, and having medial reinforcing ribs extending longitudinally outward from locations inward of the termination of the flanges. Two embodiments are shown, one in which the blade is flat and the ribs do not extend outward as far as the beginnings of the cutting edges, and one which defines a pair of central dihedral angles and is outwardly discontinuous angularly in its connection to the cutting tips, and in which the ribs extend across the dihedral angles and the discontinuities beyond the inward beginnings of the cutting edges. The blades are of uniform thickness, and the ribs are narrower outwardly than inwardly, terminate outwardly in right circular conical surfaces and inwardly in oblique circular conical surfaces, and are of uniform height between the terminations.

摘要翻译： 一种用于旋转式割草机的改进的叶片，其具有纵向延伸的切割边缘的向外的尖端和具有侧向凸缘的中心部分，并且具有从凸缘的端部内部的位置纵向向外延伸的中间加强筋。 示出了两个实施例，其中刀片是平坦的，并且肋不会向外延伸到切割刃的开始处，并且限定一对中心二面角并且与其切割的连接成角度地向外不连续 尖端，并且其中肋延伸穿过二面角以及超过切削刃内侧开始的不连续性。 叶片具有均匀的厚度，并且肋部向内比向外更窄，在右圆形圆锥形表面中向外终止并且在倾斜圆锥形表面中向内终止，并且在端子之间具有均匀的高度。