F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 25/02 (2006.01) F16B 35/06 (2006.01)
Patent
CA 2198832
A self-countersinking screw including an inverted-conical head portion formed at a top with a cavity adapted to receive a tip of a screwdriver and having a conical bottom, said conical bottom having a plurality of triangular recesses each having a lateral side extending inwardly to form a sharp edge and a space for receiving chips, a threaded portion, and a tapered portion having a large diameter connected with the head portion and a small diameter connected with the threaded portion, whereby the sharp edge will make a countersink on a workpiece when the countersunk head screw is turned therein.
Walther Uli
Yu Chao-Hsin (michael)
Gowling Lafleur Henderson Llp
Walther Gerda
Walther Mirco
Walther Uli
Yu Chao-Hsin (michael)
LandOfFree
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