Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1985-07-10
1987-02-10
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 57, 411 71, A16B 1304
Patent
active
046420096
ABSTRACT:
A wall plug for fastening articles to hollow building materials such as panels and hollow walls, and also solid building materials, including a first end part having a longitudinal bore, a second end part having a longitudinal bore, two limbs extending at one end from the first end part and connected at another end to the second end part, the two limbs having two facing surfaces separated by a slot, and a central region having an elliptical cross-sectional profile that has a major and a minor diameter and which gradually becomes circular towards the first end part and towards the second end part, the slot having a width substantially corresponding to the difference between the major and minor diameters of the elliptical cross-sectional profile, and longitudinal ribs provided in the facing surfaces of the two limbs to provide a continuation of the longitudinal bore in the top part.
REFERENCES:
patent: 3143916 (1964-08-01), Rice
patent: 3937122 (1976-02-01), Reidel
patent: 4197781 (1980-04-01), Giannuzzi
patent: 4340330 (1982-07-01), Reidel
Holko Thomas J.
Striker Michael J.
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