One-direction captive screw fastener

Details One-direction captive screw fastener One-direction captive screw fastener

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 39/32 (2006.01) F16B 39/28 (2006.01) F16B 41/00 (2006.01) F16B 5/02 (2006.01)

Patent

CA 2172775

A one-directional captive screw attachable to a panel that is hand tightenable, but requires a tool to loosen once hand tightened. The captive screw includes a screw having a head with a recess and a threaded portion, a knob having a central longitudinal axis coaxial with the screw, a one-directional ratchet between the knob and the screw. The ratchet engages to allow the screw to be tightened in a clockwise direction using the knob, and disengages when rotated in a counterclockwise direction, such that a tool is required to loosen the screw by use of the recess.

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