Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Oppositely acting double wedge expander means
Patent
1988-12-05
1990-08-07
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Oppositely acting double wedge expander means
411 26, 411 28, 411 55, 411 63, F16B 1304
Patent
active
049463250
ABSTRACT:
An expansion anchor stud comprises an expansion anchor for gripping a hole in a surface, an axially-aligned, externally threaded stud of substantially the same outside diameter as the anchor and engaging the distal end of the anchor, and an axially-aligned bolt extending through a hole in the anchor and engaging the stud. A head on the proximal end of the bolt abuts the proximal end of the anchor, and external threads on the bolt engage internal threads in a hole extending through the stud. The anchor is expanded by a tool inserted into the distal end of the hole in the stud to engage the distal end of the bolt and rotate the bolt relative to the stud, thereby axially compressing, and hence expanding, the anchor. The distal end of the stud extends, in use, through a hole in a panel being mounted to the surface so that a nut may be threaded onto the external threads of the stud to secure the panel to the surface.
The distal end of the bolt is provided with a recess, slot, crossed slot or the like, for receiving an Allen wrench, the blade of a screwdriver, the tip of a Phillips head screwdriver, or the like, respectively.
The expansion anchor is preferably of the double expansion type having a first expansion member disposed at its distal end and a second expansion member disposed at its proximal end, and the proximal expansion member may be unitary with the head of the bolt.
REFERENCES:
patent: 719426 (1903-02-01), Boone
patent: 1513669 (1924-10-01), Nicewarner
patent: 1957533 (1934-05-01), Gelpcke
patent: 2028881 (1936-01-01), Saleh
patent: 2143086 (1939-01-01), Pleister
patent: 3202034 (1965-08-01), Korenchan
patent: 3432214 (1969-03-01), Cashman
patent: 4478542 (1984-10-01), Whelan
patent: 4537541 (1985-08-01), Giannuzzi
patent: 4702656 (1987-10-01), Kerrom
patent: 4789282 (1988-12-01), Abraham
patent: 4818163 (1989-04-01), Beretter
patent: 4832548 (1989-05-01), Strobel
Dino Suzanne L.
Linden Gerald E.
Smith Gary L.
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