Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1995-06-07
1997-12-02
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
811244, 411 3, 411281, B25B 1300
Patent
active
056924194
ABSTRACT:
An improved deformable locking fastener system comprises a fastener, a deformable collar and a dedicated installation tool. The fastener has a threaded exterior defining a plurality of axial flutes which are configured to prevent the collar from prematurely capturing the fastener during installation. The collar comprises a cylindrical forward portion, a central portion having an elliptical cross-sectional shape and a rearward portion having an elliptical cross-sectional shape. The collar portions have axial heights selected to maximize the strength of the collar and to minimize the weight of the collar. The installation tool contacts the collar along driving ridges which reduces the radial compression of the collar and increases the tangential driving force turning the collar during installation. In addition, the installation tool includes oblique driving and swaging ridges which prevent premature cam-off of the installation tool when generating a desired preload and which swage collar material onto the fastener to lock the components together.
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Wing, George S. The Nova-Tek.TM. Fastening System, entire brochure, Oct. 27-29 1987.
Air Industries Corporation
Danganan Joni B.
Meislin D. S.
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