发明名称 |
HELICALLY FLUTED ROUTER BIT |
摘要 |
A router bit has an elongated cylindrical body with a closed helical flute having a concave wall surface merging into a convex wall surface. The width of the flute spans approximately half the circumference of the body, with the flute being formed by a single mill cut from a rotary mill cutter. A recess is formed in the unfluted portion of the body by holding the body against the cutting edge of the rotary grinding wheel and rotating it so the recessed portion forms a substantially cylindrically curved peripheral relief wall encircling the body from one edge to the other of the flute. The relief wall intersects the concave surface of the flute to form a helical cutting edge extending approximately 90 DEG around the circumference of the relief wall.
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申请公布号 |
US3701188(A) |
申请公布日期 |
1972.10.31 |
申请号 |
USD3701188 |
申请日期 |
1971.01.14 |
申请人 |
WALL MACHINE WORKS |
发明人 |
HARRY W. WALL;EUGENE W. WALL |
分类号 |
B23B51/08;B23C5/10;B23P15/34;B27G13/02;(IPC1-7):B26D1/12 |
主分类号 |
B23B51/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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