Schraube mit primärem und sekundärem Gewinde

In a fastener (10) having a head (40) and a shank (20) having a generally cylindrical portion (22) with a proximal end (24) adjoining the head (40) and with a distal end (26), the shank has a primary thread formation (100) and a secondary thread formation (120). The primary thread formation (100) ha...

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Bibliographic Details
Main Author HSING, JOHN J
Format Patent
LanguageGerman
Published 24.12.2003
Edition7
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:In a fastener (10) having a head (40) and a shank (20) having a generally cylindrical portion (22) with a proximal end (24) adjoining the head (40) and with a distal end (26), the shank has a primary thread formation (100) and a secondary thread formation (120). The primary thread formation (100) has a generally uniform radial dimension along the generally cylindrical portion (22). The secondary thread formation (120) has a radial dimension tapering outwardly so as to increase continuously from a region where the secondary thread formation (120) originates near the distal end (26) to a region where the secondary thread formation (120) has a maximum radial dimension, the latter region being spaced from the proximal end (24). If the secondary thread formation (120) is interrupted, tapping torque is lower, as compared to tapping torque if the secondary thread formation (120) is continuous.
Bibliography:Application Number: DE20006001430T