Patent · US Expired

Method of producing an expansion sleeve for a metallic expansion dowel assembly

US4601192A · kind A · utility

0Cited by

4References

5Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Gusztav Lang · Munich, DE
Erich Leibhard · Munich, DE
Peter Froehlich · Schwanau, DE

Key dates

Filing date	Jan 8, 1985
Grant date	Jul 22, 1986
Priority date	—
Expiry date	Jan 8, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21K1/76
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An axially elongated expansion sleeve is formed from an extruded cylindrically shaped blank with a blind hole in one end. An axially extending part of the blank from the other end is deformed into a U-shaped section of uniform thickness. The U-shaped section is upset so that it increases in thickness toward the other end. The upset U-shaped section is shaped to provide it with a cylindrically shaped outside surface with the inside base of the section sloping toward the axis of the sleeve in the direction toward the other end.

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