Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1981-03-05
1983-12-27
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 15, F16B 1306
Patent
active
044228139
ABSTRACT:
A device to secure an ornament or fixture to the surface of a panelled wall which device is inserted, made immobile and is easily removed from a surface-to-surface boring in the wall, characterized by a multi-part, longitudinally collapsible shaft with anchoring socket, the die-cut, weakened sides of which, when fitted into the wall and when driven clockwise at its tapered threaded base by a removable screw, compress and widen under the force generated by the screw to expand and tighten against the interior surface of the wall furthest from the point of insertion thereby preventing movement of the socket when it is located inside the wall boring, having also the means for removal by the introduction of a rigid insert of a length to reach the tapered, compressed section of the multi-part shaft so that separation of the expanded section of the shaft from the unexpanded section of the shaft occurs when the protruding end of the insert is struck with sufficient force to unsnap the parts of the shaft and the expanded section alone is additionally propelled in the direction of the force and falls inside the panelled wall at its base thereby permitting the remaining unexpanded section of the socket to be completely removed from the wall boring.
REFERENCES:
patent: 1365719 (1921-01-01), Ogden
patent: 2236079 (1941-03-01), Wipper
patent: 2559281 (1951-07-01), Croessant
patent: 3222449 (1966-05-01), Becker
patent: 3236143 (1966-02-01), Wing
patent: 3257889 (1966-06-01), Fischer
patent: 3369442 (1968-02-01), Darby et al.
patent: 3487745 (1970-01-01), Brunelle
patent: 3513746 (1970-05-01), Forsberg
patent: 3888156 (1975-06-01), Fima
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