Fastener plunger entry resistance means

Details Fastener plunger entry resistance means Fastener plunger entry resistance means

F - Mech Eng,Light,Heat,Weapons

16

B

24/59

F16B 13/06 (2006.01) F16B 19/10 (2006.01) F16B 21/07 (2006.01)

Patent

CA 1083788

ABSTRACT OF THE DISCLOSURE A fastener is disclosed which is adapted to be secured in a perforated member. The fastener comprises a grommet having a sleeve portion with an entry end and a set of fingers continuing from its other end; a plunger having an expander portion slidable through the sleeve portion to engage inwardly inclined surfaces on said fingers and expand the fingers, and a radially contractable ring of normally greater diameter than the inside of said sleeve and spaced from said expander portion a distance no greater than the distance from said entry end to said inclined surfaces and thereby being engageable with the sleeve portion prior to expansion of the fingers by the expander portion, whereby the friction between the sleeve and ring increases the total force required to spread the fingers.

305023

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