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公开(公告)号:US4010542A
公开(公告)日:1977-03-08
申请号:US591173
申请日:1975-06-27
CPC分类号: B26B3/08
摘要: A flat spring steel element has a handle portion, an offset shank portion, and a blade portion defining a symmetrically ground chisel edge. The edge is oriented at 45.degree. to the handle axis and each end of the chisel edge is ground to define two scoring tips. One of these tips has a 15.degree. forward rake angle when the tool handle is held perpendicular the surface to be scored, and the other tip has a similar rake angle when the tool handle is held at a slightly inclined position relative to such surface.
摘要翻译: 扁平弹簧钢元件具有把手部分,偏移柄部分和限定对称地凿边缘的刀片部分。 边缘相对于手柄轴线定向45°,并且凿边缘的每个端部被研磨以限定两个刻痕尖端。 当工具手柄垂直于待刻划的表面时,这些尖端中的一个具有15°的前倾角,并且当工具手柄相对于该表面保持在稍微倾斜的位置时,另一个尖端具有相似的前角。