One-way nut fastener

Details One-way nut fastener One-way nut fastener

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 41/00 (2006.01) F16B 37/00 (2006.01) F16K 27/06 (2006.01) F16K 35/00 (2006.01)

Patent

CA 2401814

A novel, one-way nut fastener including a nut body with a side wall that is internally threaded and lobes that extend from the side wall of the nut body. Each lobe has a flat portion that extends substantially radially away from the side wall and a curved portion that extends from the flat portion to the flat portion of an adjacent lobe. A special tool uses the leverage that is gained from the flat portions of the lobes to tighten the cap threads onto the threads of a stem portion. Since the leverage gained from the lobes, which is used to tighten the nut fastener, cannot be used to loosen the fastener, it is much more difficult to remove the nut fastener.

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