Attachment for pneumatic hammers for punching holes of varying s

Tool driving or impacting – Impacting devices – Impact transmitting anvil

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Details

173133, 83660, 72325, B21D 3102

Patent

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045454400

ABSTRACT:
A device for punching holes of varying size in sheet metal by a pneumatic hammer. A tapered punch is employed with an adjustment at the muzzle end of the hammer which selectively limits the travel and penetration of the punch thereby determining the size of the hole. A special attachment for the tapered punch and a punch holder for the punch is provided for attachment to the muzzle end of the pneumatic hammer. The attachment is in the form of a housing which receives the punch and punch holder and can be screwed on the muzzle end of a pneumatic hammer and present the punch holder to the internal hammer like drive of a conventional pneumatic hammer.

REFERENCES:
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patent: 4239143 (1980-12-01), Johnson

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