Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut
Patent
1991-09-25
1993-01-26
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed bolt or screw with threads and complementary nut
411371, 411379, 411542, 411915, F16B 3300
Patent
active
051818175
ABSTRACT:
A fastener for securing an attachment such as a guiderail to a surface of a wall. Such an attachment is provided with an internally-threaded aperture to receive the externally-threaded shank of a bolt passed through an aperture in the wall to which the attachment is to be mounted. The fastener includes a hardened washer and a bolt. The bolt is passed through registered apertures in the washer and the mounting wall and then threaded into the internally-threaded aperture in the attachment. The aperture in the washer can be conical in shape so that the shank of the bolt can be accommodated even where the aperture in the attachment is mis-tapped so that the bolt does not extend perpendicular to the wall of the attachment. The outer peripheral surface of the washer is threaded, and a cap is provided with internal threading compatible with the threads formed in the outer peripheral surface of the washer. As a result, the cap can be threaded tightly against the outer surface of the mounting wall when the attachment is secured to the inner surface of the mounting wall.
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patent: 4826380 (1989-05-01), Henry
patent: 4944644 (1990-07-01), Bell
Crown Iron Works Company
Lindsey Rodney M.
Nawrocki Lawrence M.
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