Patent · US Active

Thread-forming screw

US7484920B2 · kind B2 · utility

5Cited by

9References

10Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Juergen Wieser · Ober-Ramstadt, DE
Johan Lennartsson · Malmö, SE
Pierre Hohmeier · Feldkirch, AT
Franz Huber · Türkheim, DE

Key dates

Filing date	Sep 23, 2005
Grant date	Feb 3, 2009
Priority date	—
Expiry date	Dec 12, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16B33/06
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A thread-forming screw (11; 21; 31; 51), has a stem (12) with at least one thread (14; 24; 34; 54) arranged, at least regionwise, over its circumference, and a plurality of cutting elements (16; 26; 36; 56) arranged in a respective plurality of recesses (15; 25; 35; 55) formed in the at least one thread (14; 24; 34; 54), with the cutting elements (16; 26; 36; 56) having a hardness greater than a hardness of the at least one thread (14; 24; 34; 54) and formed as weld beads received in the recesses (15; 25; 35; 55).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.