Long wearing punch

Details Long wearing punch Long wearing punch

1987-03-23

1988-08-09

Kazenske, E. R.

Cutting

Tool or tool with support

Cutting couple type

83686, B26F 114

Patent

active

047620439

ABSTRACT:
An improved punching tool having a long wearing characteristic and characterized in having at least first and second punching edges disposed on the leading end of the punch body wherein these punching edges are separated by an annular groove and wherein the trailing punching edge is slightly smaller in diameter than the leading punching edge.

REFERENCES:
patent: 295227 (1884-03-01), Briggs, et al.
patent: 1318489 (1919-10-01), Donaldson
patent: 1441502 (1923-01-01), Hook
patent: 2209025 (1940-07-01), Kaplan et al.
patent: 2522440 (1950-09-01), Freter
patent: 3143026 (1964-08-01), Akerson
patent: 3988955 (1976-11-01), Engel et al.
patent: 4273015 (1981-06-01), Johnson

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