Patent · US Active

Screw

US8182186B2 · kind B2 · utility

11Cited by

8References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Franz Huber · Türkheim, DE
Simon Oppeneiger · Lustenau, AT

Key dates

Filing date	Oct 29, 2008
Grant date	May 22, 2012
Priority date	—
Expiry date	Aug 4, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16B25/0052
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A screw (11) has a shaft (12), a thread (13) which is arranged in at least some areas over the circumference of the shaft (12) and which defines a helix (14), and cutting bodies (26; 36; 46; 56, 66) made of a material having hardness greater than the hardness of the thread (13) and arranged in recesses (20, 21) of the thread (13), with the cutting bodies (26; 36; 46; 56, 66) having their longitudinal extension oriented along the helix (14) so that their longitudinal axes (27; 37; 47; 57, 67) enclose an angle (A; B; C; D, E) of −35° to +35° with the respective tangents of the helix (14).

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