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:
Dec. 23, 1997
Filed:
Feb. 22, 1996
Applicant:
Inventor:
Michael Habele, Waldenbuch, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 5738 ; 81429 ; 73761 ; 254 / ;
Abstract
A screwing device provides an ultrasound-controlled tensioning of a screw connection. A measurement of the pre-tensioning force of the screw connection can be performed without complete fitting of a screwing tool on the screw connection. The screwing tool for this purpose is displaceable axially within a certain limit relative to the rotary drive shaft. The screwing tool is pre-tensioned by a spring in direction toward the screw connection, so that a contact pin arranged centrally inside the screwing tool for electrical contacting of a vibration body is arranged always inside the screwing tool to be protected.