Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...
Patent
1980-04-28
1982-09-21
Britts, Ramon S.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Nut, and means to engage substructure on its opposite faces...
411165, F16B 3926
Patent
active
043504655
ABSTRACT:
A screw having a head and a body defining an axis of rotation extending downwardly from the head and formed integrally therewith is provided with a flange extending radially and downwardly from the head about the upper end of the body. The flange is slotted to define a plurality of deformable tabs joined at their respective bases to the head. At least a portion of each tab is twisted relative to its base about an axis extending along the flange radially from the axis of rotation in a direction so that an edge of each tab defined by the slots, the edge being on the side of the tab facing in the direction of rotation of the screw for removal, projects downwardly. The respective ends of the edge lie in essentially a single plane extending normally to the axis or rotation, the bottom surface of the tabs defining an essentially straight line in radial cross-section except in the region of twist.
REFERENCES:
patent: 1938399 (1933-12-01), Olson
patent: 2226491 (1940-12-01), Gustafson
patent: 2266555 (1941-12-01), Jordan et al.
patent: 3343580 (1967-09-01), Coldren
Britts Ramon S.
Industrial Fasteners Corp.
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