Patent · US Active

Installation method for an expansion anchor and impact screwdriver for installing an expansion anchor

US9233458B2 · kind B2 · utility

4Cited by

2References

4Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Peer Schmidt · Gettorf, DE
Joerg Appl · Kaufering, DE
Serhey Khandozhko · Buchs, CH

Key dates

Filing date	Feb 27, 2012
Grant date	Jan 12, 2016
Priority date	—
Expiry date	Sep 1, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25B23/1475
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An installation method for an expansion anchor is carried out by repeatedly exerting rotary-percussive strikes onto the shank (2) of the expansion anchor (1) by an impact screwdriver. The repeat rate (Ntarget) of the rotary-percussive strikes is selected as a function of the tightening torque prescribed for expanding the expansion sleeve (3) of the expansion anchor (1). The impact screwdriver stops generating rotary-percussive strikes when the detected mean rotational speed (d) of the shank falls below a threshold value (D).

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