US 4,285,264 AGranted

General purpose hollow wall toggle fastener

AssigneeCoats & Clark, Inc.

InventorRuediger Einhorn

Life of this patent

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Abstract

A hollow wall fastener using a conventional toggle bolt and a toggle anchor which is pointed and which has an open groove for receiving the toggle bolt. An end cap within the anchor has an internally threaded head portion and a frangible portion which allows the head portion to separate from the rest of the end cap when the end of the bolt is threaded into the head portion, thus twisting the frangible portion until it breaks. Thereafter the head portion prevents withdrawal of the toggle bolt from the anchor. The end of the groove has a threaded portion which cooperates with a threaded portion of an aperture opposite the groove to permit the anchor to pivot with respect to the bolt to a position where the bolt is threadably engaged and locked in the threaded portions of the anchor, forming a "T" configuration behind the surface of the hollow wall. Thereafter the bolt may be rotated to draw the anchor tightly against the interior of the hollow wall.

Claims7

Dependent claims

A hollow wall fastener comprising:

a threaded toggle bolt;
means for driving, pulling and rotating said bolt;
and
an elongated toggle anchor having:
a longitudinal recess for receiving one end of said bolt in longitudinal alignment with the longitudinal axis of said anchor;
an end cap retention recess adjacent and in longitudinal alignment with said longitudinal recess, said recesses being separated by a wall portion of said toggle anchor having a transverse slot therein providing communication between said recesses;
an end cap having a non-circular retention portion, a frangible intermediate portion having a width less than the width of said slot, and an internally threaded head portion for threadably engaging said end of said bolt,
said retention portion and head portion being disposed in said retention and longitudinal recesses respectively, with said intermediate portion extending therebetween through said slot;
means permitting pivoting of said anchor with respect to said bolt about a pivot axis within said anchor, from said alignment position to another position in which the longitudinal axis of the anchor is substantially perpendicular to the longitudinal axis of said bolt;
and
means comprising an approximately semicircular threaded groove in said anchor for locking said bolt and anchor together in snap-fit fashion mutually threadably engaged relationship in said other position.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/039,186Filed 15 May 1979
Granted: 25 Aug 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16B 13/0808
With separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual…
A47G 1/1633
Devices for hanging or supporting pictures, mirrors, or the like: wall members for connection to a conventional picture
F16B 13/003
Self-cutting: with a separate drilling bit attached to or surrounded by the dowel element
F16B
Devices for fastening or securing constructional elements or machine parts together