Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Made up of plural expansible segments or sections
Patent
1991-08-26
1992-09-01
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Made up of plural expansible segments or sections
411 21, 411 55, F16B 1304, F16B 1306
Patent
active
051434970
ABSTRACT:
The expansible plug for fixing an element or frame member on solid or hollow building material, has a plug shank (1) having a plurality of expansion discs (3,4) arranged one after the other along the plug shank (1). The expansion discs (3,4) are provided with eccentric bores (12,13) located so that, without the fixing screw (23) inserted, the bores (12,13) of adjacent discs (3,4) are noncoaxial or staggered with respect to one another and overlap one another and so that the overlapping bores (12,13) form a constricted screw hole (15) through the plug shank (1). When a fixing screw (23) is screwed into the expansible plug the expansion discs (3,4) are displaced laterally so that the bores (12,13) in the expansion disks have a coaxial relationship and the expansion disks (3,4) are displaced laterally outwards from the plug shank to secure the expansible plug in a hole in which it is located. The expansion discs (3,4) are preferably attached to joining members (9,10) on opposite sides of the plug shank and every second successive expansion disc (3,4) is attached to a common resilient joining member (9,10).
REFERENCES:
patent: 2147357 (1939-02-01), Scholtes
patent: 3535750 (1970-10-01), Metz
fischerwerke Artur Fischer GmbH & Co. Kg.
Striker Michael J.
Wilson Neill R.
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