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. 06, 1979
Filed:
Aug. 04, 1977
Applicant:
Inventor:
Karl-Heinz Gartner, Munich, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ; F16B / ;
U.S. Cl.
CPC ...
85 61 ; 85 74 ;
Abstract
An expansion dowel consists of a sleeve, a tie rod extending through the sleeve with an end support on one end of the tie rod and an expanding body on the other end. The end support can be a bolt head or a nut. By applying torque to the end support the expanding body can be pulled into the sleeve causing it to expand. A jacket laterally encloses the end support in form-locking engagement. The jacket is formed of a destructible material, such as a plastic, which is demolished when a predetermined torque is applied through the jacket to the end support signalling that a certain anchoring force has been achieved.