SCREW

PURPOSE:To do away with a screwdriver locking groove on an underhead fillet of a screw and to make it impossible to remove a screw thread once screwed by a regular screwdriver or the like. CONSTITUTION:A head part 12, which has a larger diameter than that of an underhead fillet 1 and made in a thin...

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Bibliographic Details
Main Author YOSHIMURA TSUTOMU
Format Patent
LanguageEnglish
Published 11.08.1995
Edition6
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:PURPOSE:To do away with a screwdriver locking groove on an underhead fillet of a screw and to make it impossible to remove a screw thread once screwed by a regular screwdriver or the like. CONSTITUTION:A head part 12, which has a larger diameter than that of an underhead fillet 1 and made in a thin cylindric body shape, is formed on a base end of the underhead fillet 1 having a screw thread portion 11 on its end and the head part 12 is formed to have its surface smoothly flat and curved. Thus it is difficult to fit a regular screwdriver or a tool thereon and therefore there is no chance of the screw to be intentionally removed.
Bibliography:Application Number: JP19940026075