DE3122402

A fastener 10 has a shank 14 presenting four surfaces 16. An opposed pair of the surfaces 16 have respective rows of radially extending wings 18 and the other two surfaces 16 have respective rows of angled wings 30. Although the wings 18 flex about straight lines at their junctures with the surfaces...

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Bibliographic Details
Main Authors CHISHOLM, LISA E., OAK PARK, ILL., US, NELSON, JOHN FREDERICK, NEW LENOX, ILL., US
Format Patent
LanguageEnglish
Published 21.11.1991
Subjects
BLASTING
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:A fastener 10 has a shank 14 presenting four surfaces 16. An opposed pair of the surfaces 16 have respective rows of radially extending wings 18 and the other two surfaces 16 have respective rows of angled wings 30. Although the wings 18 flex about straight lines at their junctures with the surfaces 16, the wings 30 flex about straight lines 36 spaced radially from the surfaces 16 because of thickened sections 34. This substantially increases the force required for removal of the fastener from an apertured workpiece as compared to the force required for introducing the fastener.
Bibliography:Application Number: DE19813122402