Patent ID: 9636740
Date: 2017-05-02
CPC Classifications: B21J

Claim:
1. An apparatus for use in removing blind rivets from work pieces, said apparatus comprising means for preventing rivets from spinning while being drilled; wherein said means for preventing comprises a device selected from: punch feet adapted for engagement with punches and having a configuration of first blades that self-center the punch foot over the head of an installed rivet and create indentations in the rivet head when force is applied to said blades via a punch; micro-stop feet adapted for engagement with micro-stops and having a configuration of second blades, said second blades engageable in a self-centered manner with indentations in the head of an installed rivet; and combinations thereof; and a punch foot, wherein: said punch foot has a cylindrical opening having a central axis and a diameter sized to fit around a rivet head; said punch foot comprises at least two of said first blades arranged within the opening in a radial array have cutting edges at an angle of about 45 degrees relative to the central axis.