Dual direction countersink

Details Dual direction countersink Dual direction countersink

1995-02-14

1997-01-28

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

408227, B23B 5100

Patent

active

055972730

ABSTRACT:
A hand operated countersink has a shaft attached at one end to a cutting insert and at the other end to a handle, wherein said cutting insert is substantially of isosceles triangular shape. The insert has at least two cutting edges each disposed along an equal side of the triangle, one of the cutting edges being operative to cut when the shaft is rotated in one direction, and the other cutting edge being operative to cut when the shaft is rotated in the other direction. In a preferred embodiment, the insert has four cutting edges, two disposed along opposite edges of one equal side of the triangle, and two disposed along opposite edges of the other equal side of the triangle.

REFERENCES:
patent: 2276771 (1942-03-01), Hawker
patent: 2448385 (1948-08-01), Michela
patent: 2450075 (1948-09-01), Bashara
patent: 4016614 (1977-04-01), Press

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