Patent · US Expired

Expansion dowel

US4147444A · kind A · utility

13Cited by

4References

9Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Armin Herb · Apfeldorf, DE
Erwin Schiefer · Munich, DE

Key dates

Filing date	Dec 13, 1977
Grant date	Apr 3, 1979
Priority date	—
Expiry date	Dec 13, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T403/5786
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An expansion dowel includes a cylindrically shaped axially extending sleeve and a spreader for expanding the sleeve. The sleeve has a leading end and a trailing end and at least one axially extending slot formed in the sleeve. For at least a portion of its length, the slot has oppositely arranged sides converging in the direction of the leading end of the sleeve. The spreader fits into the part of the slot with the converging sides and has complementary converging sides to those in the slot. The spreader includes an impact piece against which impact force can be applied for axially displacing the spreader through the slot and expanding the sleeve.

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