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:
Oct. 31, 1978
Filed:
Aug. 13, 1976
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
In a straddling dowel or expansion anchor assembly, a threaded bolt or stud has a head or nut adjacent one end for securing a member onto a support structure. The bolt is threaded into one end of a sleeve-like member and a threaded projection extends axially from the other end of the member with the projection extending axially through an expansion sleeve. A spreader is threaded onto the outer end of the projection for use in expanding the expansion sleeve. A device interconnects the bolt or stud and the sleeve-like member so that rotation of the bolt is transmitted to the sleeve-like member for pulling the spreader into and expanding the expansion sleeve. When a minimum anchoring value of the anchor within a borehole is achieved, the interconnection is disengaged. By continued rotation of the bolt or stud the member can be secured to the support structure with the interconnecting device being completely enclosed within the anchor structure.