Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Double-ended
Reexamination Certificate
2005-07-19
2005-07-19
Miller, William L. (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Double-ended
C411S412000, C411S308000, C411S107000
Reexamination Certificate
active
06918727
ABSTRACT:
An anchoring screw with triple threads of different depths of thread especially useful for coupling with a construction hole on a cement wall (or other construction boards and panels) includes a first bolt section, a tool driven section and a second bolt section. The second bolt section has a first screw thread, a second screw thread and a third screw thread of different depths of thread formed on the outer surface that are spaced from one another at 120 degrees. Thus, the screw threads can gather extruded cement debris when the screw is fastened into the construction hole to produce a stronger fastening effect. As there is no expansion incurred, the wall or board does not crack. Therefore, the interval between the construction holes may be shortened, and the number of construction holes may be increased in a given unit area. The anchoring screw of the invention also may be removed easily and conveniently to facilitate construction.
REFERENCES:
patent: 3180202 (1965-04-01), Kahn
patent: 3897713 (1975-08-01), Gugle
patent: 4304503 (1981-12-01), Gehring et al.
patent: 4334815 (1982-06-01), Knohl
patent: RE34969 (1995-06-01), Dixon et al.
patent: 5613968 (1997-03-01), Lin
patent: 2003/0206787 (2003-11-01), Huang
Joker Industrial Co., Ltd.
Miller William L.
Troxell Law Office PLL
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