Title: Self-penetrating wallboard anchor

Abstract: A self-penetrating fastener assembly for anchoring in wallboard has a pointed anchor member and a threaded fastener. The anchor member has a longitudinal recess formed by semicylindrical segments which intersects an aperture that extends through the anchor. The fastener is aligned within the recess which engages the threads of the fastener, the head thereof protruding beyond the end of the anchor and the assembly is hammered into the wallboard. When the anchor clears the wallboard, the fastener is threadingly advanced into the anchor which, in turn, is drawn up against the back of the wallboard securely attaching an article thereto.

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Inventors: Peterson, Francis C. (St. Charles, IL)
Barth, Gerald D. (South Elgin, IL)
Slotten, Rodney O. (Batavia, IL)

Application Number: 06/078864
Filing Date: 1979-09-26
Publication_date: 1981-08-18
Assignee: ILLINOIS TOOL WORKS

Primary Class(es): 411/340 411/341, 411/346
Other Classes: F16B13/00; F16B13/08; F16B13/04; F16B21/00
US Patent Ref:

0867799	October, 1907	Cook	85/3R
1738133	December, 1929	Anderson	85/3R	Toggle bolt
2439364	April, 1948	King et al.	85/3R	Clamp
2519511	August, 1950	Stelter	85/3R	Anchor or toggle bolt
2532040	November, 1950	Seely	85/3R	Toggle bolt
2919089	December, 1959	Durham	248/71	Pointed metal type supporting device
3605547	September, 1971	Millet	85/3S
3782238	January, 1974	Polos	85/3R	SELF-DRILLING TOGGLE BOLT ASSEMBLY
3927597	December, 1975	Stults et al.	85/3R	Blind fastener
4043245	August, 1977	Kaplan	85/3R	Anchoring device
4196883	April, 1980	Einhorn	85/3R	Hollow wall fastener

Other Refs: DE2577002

May, 1933

85/3R

Primary Examiner: Britts, Ramon S.
Assistant Examiner:
Attorney: Thomson, Richard K.
Buckman, Thomas W.

Claims: