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:
Apr. 06, 2004
Filed:
Jul. 24, 2002
Rainer Fischer, Waldachtal, DE;
Willi Haug, Freudenstadt, DE;
fischerwerke Artur Fischer GmbH & Co. KG, Waldachtal, DE;
Abstract
An expansible fixing plug ( ) has an expansion screw ( ), which is located in an expansible fixing plug sleeve ( ). In accordance with the invention, a screw thread ( ) is of saw tooth construction and a rear part ( ) of the fixing plug sleeve ( ) is axially extendable. When the expansible fixing plug ( ) is subjected to axial loading the expansion screw ( ) moves axially in the fixing plug sleeve ( ) and the screw thread ( ) expands the fixing plug sleeve ( ). The expansible fixing plug ( ) therefore has a subsequent-expansion behavior when a drilled hole becomes enlarged. The expansible fixing plug ( ) can be mounted by hammering in without turning the expansion screw ( ). The core diameter of the screw thread ( ) enlarges from the front to the rear to increase the capacity of the expansion screw ( ) to withstand transverse loading.