Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1993-08-13
1994-05-17
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 59, F16B 1304
Patent
active
053122151
ABSTRACT:
A plug is suitable for use in preformed blind holes in rigid and soft material and also holes in sheet form material. The plug comprises a head portion joined to a tail portion by four identical legs, all having flexing points towards their ends and in a central portion, the radial thickness of the legs increasing towards the central portion, so that the outer diameter of that portion is greater than the diameter of the tail portion and the head portion, and the transverse thickness of the legs decreasing towards the central portion.
REFERENCES:
patent: 3174387 (1965-03-01), Fischer
patent: 3365999 (1968-01-01), Perlin
patent: 3779239 (1973-12-01), Fischer et al.
patent: 4269106 (1981-05-01), Leibhard et al.
patent: 4556351 (1985-12-01), Wollar et al.
patent: 4642009 (1987-02-01), Fischer
patent: 5205688 (1993-04-01), Sundstrom
Black & Decker Inc.
Dearing Dennis A.
Del Ponti John D.
Lindsey Rodney M.
Yocum Charles E.
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