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:
Jul. 31, 1984
Filed:
Dec. 02, 1981
Raimer Uhlig, Munich, DE;
Gusztav Lang, Munich, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
Expansion dowels for use in slabs, masonry and similar structural components having a face surface and a hollow space inwardly of the face surface so that the dowel can be inserted through the face surface into the hollow space. The dowel has a shaft part which extends through the face surface into the hollow space. Expansion arms are flexibly articulated to the shaft part and are located in the hollow space when the dowel is inserted. Support levers are flexibly articulated to the expansion arms and are interconnected by a link. The support levers are also located within the hollow space when the dowel is fully inserted. The expansion arms and support levers can be angularly displaced between an insert position so that the dowel can be inserted into the hollow space and an expansion position for holding the dowel in the inserted position. Releasable stops are provided for securing the expansion arms and support levers in the insert position.