Patent · US Active

Chipless thread-forming screw

US8596943B2 · kind B2 · utility

2Cited by

13References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Sven Matthiesen · Gettorf, DE
Peter Hertlein · Gams, CH
Michael Baumgartner · Rekingen, CH

Key dates

Filing date	Feb 21, 2008
Grant date	Dec 3, 2013
Priority date	—
Expiry date	May 15, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16B25/106
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A chipless thread-forming screw (10) has a thread-carrying shank (11) provided at its opposite ends with a tip (13) and a head (4), respectively, and having a diameter between 0.25 and 0.35 mm, with the shank (11) having at least one frustroconical section (21) extending from the tip (13) in direction of the head (14) and having, with respect to the thread root (22), a point angle (α) between 200 and 300, and a cylindrical section (25) extending between the frustroconical section (21) and the head (14), and with a starting line (23) of the thread (15) remote from the head (14) being spaced from the tip (13) by a distance (Lt) from 0 to 0.3 mm.

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