The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 1994
Filed:
Jun. 24, 1992
Heinz Bisping, Augsburg, DE;
Horst Goetzfried, Igling, DE;
Franz Popp, Buchloe, DE;
Wolfgang Hausner, Igling, DE;
Helmut Mirsberger, Munich, DE;
Hilti Aktiengesellschaft, Furstentum, LI;
Abstract
An expansion dowel is formed of an axially elongated expansion member and an expansion element insertable into a bore through the expansion member. The expansion member has two axially extending first slots located diametrically opposite one another and open at one end of the member. Two axially extending second slots are located in the expansion member offset circumferentially by 90.degree. from the first slots. The second slots are closed at their opposite ends. The first and second slots partially overlap in the axial direction, so that the expansion member is radially expandable in the overlapping region of the slots, while the expansion element is prevented from moving off center during the expanding operation.