Plastic fastener for threaded blind aperture

Details Plastic fastener for threaded blind aperture Plastic fastener for threaded blind aperture

1997-01-30

1998-01-06

Saether, Flemming

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Oppositely acting double wedge expander means

411 54, 411 41, 411 60, F16B 1304

Patent

active

057047464

ABSTRACT:
The fastener, which is typically made of thermoformed or similar plastic, includes a shank portion at least two parallel fingers which further include a proximal end and a distal end. The proximal end of the fingers is integral with a base portion and the distal end of the fingers is integral with bridge elements which attach to a wedge element. A driving pin is attached to the base portion and is aligned with a gap formed between the at least two parallel fingers. The parallel fingers further include lateral serrated portions and radially oriented stabilizing fins. Upon impact to the driving pin when the fastener is placed into a blind threaded aperture, the wedge portion forces apart the distal ends of the parallel fingers, while the driving pin forces apart the proximal ends of the parallel fingers thereby driving the serrated portions of the fingers against the threads of the blind threaded aperture.

REFERENCES:
patent: 1852089 (1932-04-01), Pleister
patent: 4488843 (1984-12-01), Achille
patent: 4856950 (1989-08-01), Bushnell
patent: 5332346 (1994-07-01), Shinjo

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