Patent · US Active

Production method for a semi-finished product and semi-finished product

US9718115B2 · kind B2 · utility

0Cited by

11References

13Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Michael Selb · Feldkirch, AT
Matthias Wissling · Gießen, DE
Armin Kueper · Schellenberg, LI

Key dates

Filing date	Jul 14, 2011
Grant date	Aug 1, 2017
Priority date	—
Expiry date	Dec 28, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21B1/18
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The production method according to the invention for creating a thread in an elongated semi-finished product comprises the following steps: shaping, especially lengthwise rolling, of at least two lengthwise grooves into a blank and lengthwise rolling of a thread into the areas circumferentially delimited by the grooves. The distance from the beds of the grooves to the axis of the blank is smaller than the distance from the root of the thread to the axis.

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