Arrangement for retaining an article to a structural surface

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Having securing element projecting through aperture in sleeve

Patent

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Details

411412, 411424, 411510, F16B 1304, F16B 3504

Patent

active

050982370

ABSTRACT:
An article retention arrangement utilizing a drive-in expansion fastener having a generally cylindrical, hollow body with a tapered end formed from an angular truncation of the body. The body is reinforced by one longitudinal rib so as to permit drive-in penetration from the tapered end even if the fastener is formed from plastic materials. The fastener is retained within the wall by at least one pair of hinged flanges which expand circumferentially in response to the installation of an insertion element within the hollow portion of the body. The insertion element engages an inclined surface within the body to cam the expansion flanges circumferentially outward. The expansion flanges engage the back surface of the wall while the longitudinally slit portion of the body expands within the hole created by drive-in penetration. The insertion element preferably includes an enlarged head projecting from the fastener when the insertion element is fully installed within the fastener. This head is spaced apart from the fastener and the wall by a reduced diameter portion. Thus, articles can be mounted to the wall by direct application to the insertion element. The insertion element can include a series of truncated conical sections formed so as to facilitate uni-directional insertion into the fastener and restrict removal of the insertion element. That element is also dimensioned with respect to the fastener to have a close fit which increases load support.

REFERENCES:
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patent: 4781351 (1988-11-01), Parapetti
patent: 4808051 (1989-02-01), Geitl
patent: 4902179 (1990-02-01), Harker

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