SCREW MEMBER

PROBLEM TO BE SOLVED: To provide a screw member having sufficient strength even when rotationally driven and screwed in use with an electric power tool. SOLUTION: The screw member includes a prepared hole formed in the iron wall face, and a tapping screw part to be inserted into the prepared hole in...

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Bibliographic Details
Main Authors SUGANO HIROYUKI, SUGANO MASATO, SUGANO EIICHI
Format Patent
LanguageEnglish
Published 18.06.2009
Subjects
ALLOYS
BLASTING
CHEMISTRY
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
FERROUS OR NON-FERROUS ALLOYS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
METALLURGY
THERMAL INSULATION IN GENERAL
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide a screw member having sufficient strength even when rotationally driven and screwed in use with an electric power tool. SOLUTION: The screw member includes a prepared hole formed in the iron wall face, and a tapping screw part to be inserted into the prepared hole in a tapping manner. The tapping screw part is formed of carbon steel of 0.18-0.26% carbon containing iron, which has a total length of 5-15 mm, an outer diameter of 5-15 mm not including a thread, a thread height of 0.6-1.0 mm, and a maximum thread width of 0.2-0.4 mm, and whose thread has an approximately triangular cross section, a peak angle of 20-45°, and a pitch of 1-2 mm. It is subjected to surface quenching. A hardened layer is provided ranging 0.4 mm from the surface of the tapping screw part not including the thread, with its hardness twice or more that of the center. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070308193