Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Cap over the head
Patent
1993-07-27
1994-08-16
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
411369, 411377, F16B 1900, F16B 3300
Patent
active
053381416
ABSTRACT:
A corrosion-resistant cap for use with a fastener and an elastomeric washer. The cap has a hollow head forming a cavity into which the head of the washer is placed, a perimeter outer skirt, and an inner skirt which can be swaged or bent from a longitudinal position to a transverse position perpendicular to the axis of the fastener to make contact and cover the lower surface of the flange of the fastener. This completely encloses the flange and head of the fastener and forms a cavity defined by the outside surface of the inner skirt and the inside surface of the outer skirt. An elastomeric washer will then be threaded onto the threaded shank of the fastener so that it is positioned and held in place by the cavity. Thus, when the fastener and cap are tightened down onto an object, the elastomeric material of the washer flows, completely filling the cavity and the area between the bottom of the outer skirt and the object to which the fastener is attached.
REFERENCES:
patent: 3803972 (1974-04-01), Deutsher
patent: 4041834 (1977-08-01), Herkes et al.
patent: 4373842 (1983-02-01), Bettini et al.
patent: 4749321 (1988-06-01), Knohl et al.
patent: 4887951 (1989-12-01), Hashimoto
patent: 5156509 (1992-10-01), Wu
Construction Fasteners, Inc.
Wilson Neill R.
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