Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Cap over the head
Patent
1989-02-13
1990-05-08
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Cap over the head
411431, 411907, 411903, 52515, F16B 1900, F16B 3300, F16B 3714
Patent
active
049233483
ABSTRACT:
A protective cap for fastener heads includes a preformed member formed of a naturally tacky compound of unvulcanized butyl rubber, a reinforcing layer of a non-woven polyester fabric, and a silicone-coated polyethylene release liner. The preformed member has a dome-shaped central portion and a surrounding generally flat annular flange. The reinforcing layer of the polyester fabric is disposed over a top surface of the preformed member to form a homogeneous cap construction, and the release liner covers the tacky bottom surface of the preformed member to prevent the cap from adhering to surfaces until ready for use. A plurality of the protective caps are formed in a manipulatable sheet unit and are maintained thereon by the natural tackiness of the unvulcanized butyl rubber compound. The caps are removed individually from the sheet unit, the liner is removed, and the cap is placed over an exposed fastener head so that the tacky bottom surface of the flange surrounding the fastener head adheres the cap to a surrounding surface and the tacky interior surface of the dome-shaped central portion adheres to the bolt head with the central portion being moldable about and encasing the fastener head.
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Carlozzo Ben J.
Janoski Ronald J.
Rundo Mark C.
Sterk James
Kaeding Konrad H.
Tremco Incorporated
Wilson Neill R.
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