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. 03, 1987
Filed:
Jun. 03, 1985
Applicant:
Inventors:
Artur Fischer, D-7244 Waldachtal 3/Tumlingen, DE;
Jurgen Onasch, Bonn, DE;
Manfred Haage, Herrenberg-Oberjesingen, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411 55 ; 411 57 ;
Abstract
An anchor for fastening in bore holes comprises an expander body driven into an expansion sleeve, having a slotted expansible portion, by a stay bolt to which a torque is applied to draw the expander body into the expansion sleeve. The expander body has at its trailing end a conical portion which merges into a concavely-curved portion. The angle of the concavity of the curved portion at the leading end of the expander body corresponds to a double angle of inclination of the conical portion to the central axis of the anchor.