Dual headed punch with tapered neck

Details Dual headed punch with tapered neck Dual headed punch with tapered neck

2007-09-14

2009-02-10

Peterson, Kenneth E. (Department: 3724)

Cutting

Tool or tool with support

Cutting couple type

C083S621000

Reexamination Certificate

active

07487703

ABSTRACT:
A tool is disclosed, for use with a punching press for punching holes in workpieces. A punch body is provided, elongated in an axial direction. A first punch head is formed on an end of the punch body, and has a first radial diameter, perpendicular to the axial direction. A second punch head has a second radial diameter, also perpendicular to the axial direction. The second punch head is substantially spaced from the first punch head. A neck is formed between the first and second punch heads, having a uniformly tapered diameter less than the first and second radial diameters.

REFERENCES:
patent: 295227 (1884-03-01), Briggs
patent: 2080850 (1937-05-01), Frayer
patent: 2522440 (1950-09-01), Freter
patent: 4762043 (1988-08-01), Sneed
patent: 5235881 (1993-08-01), Sano et al.
patent: 2003/0183057 (2003-10-01), Birch et al.
International Search Report for PCT/US2005/35586 mailed Jun. 1, 2007, two pages.

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