F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 31/00 (2006.01) B25B 23/14 (2006.01) F16B 31/02 (2006.01) F16B 41/00 (2006.01)
Patent
CA 2092883
A screw can be driven home in response to the application of a preselected torque by placing over the head of the screw a tubular first section of a plastic adapter wherein the first section is connected with a polygonal second section by a frangible joint. The joint breaks in response to the application of preselected torque to the second section, and the separated second section then expose a destructible diaphragm which is provided in the first section and overlie the head of the screw. The head can be engaged by the working end of a tool in response to at least partial destruction of the diaphragm. The first section can be of one piece with the head or it can be affixed thereto by an adhesive or is in mere frictional engagement with the head. Integrity and accessibility of the diaphragm indicate that the screw was driven home in response to the application of preselected torque as well as that the head of the screw was not tampered with subsequent to separation of the second section from the first section of the adapter.
Hohmann Ralf
Sauer Heinz
Spors Ralf
Winterstein Gerhard
Fetherstonhaugh & Co.
Rasmussen Gmbh
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