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:
Sep. 15, 1981
Filed:
Apr. 27, 1979
Erwin Schiefer, Munich, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
An expansion dowel for insertion through an opening in a structural member into a hollow space within the structural member, is formed of a shaft portion, a pair of expansion arms connected to the shaft portion and a pair of webs, each joined to one of the expansion arms and connected to one another. In the inserting position, the expansion arms and webs are folded inwardly and extend along the projection of the axis of the shaft portion. When the dowel is displaced into the expansion position, the expansion arms extend approximately perpendicularly to the axis of the shaft portion and each web is disposed at an acute angle to the expansion arm to which it is joined.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile