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:
Jan. 02, 2001
Filed:
Dec. 15, 1995
Gerold Mueller, Stuttgart, DE;
Peter Wolf, Leinfelden-Echterdingen, DE;
Heinz Veitinger, Murrhardt, DE;
Robert Bosch GmbH, Struttgart, DE;
Abstract
The screwdriving device (,) according to the invention has a control device (,) which uses a sensor system (,) to determine a characteristic variable (K) which characterizes a screwdriving moment (M,) of the screw connection (,) and/or an emitted moment (M) of the impact screwdriver, during or after at least one pulse emission from the impact screwdriver to the screw connection, and defines a drive variable, for example a required drive speed (n) for the next impulse emission, as a function of the determined characteristic variable (K,). In this case, the drive variable (n) is initially set to a value which corresponds to a value (K,) to be expected of the characteristic variable (K) and its magnitude is in any case less than a desired value (K,) for the final screw connection state. This prevents the desired screwdriving moment being exceeded even after the first impulse emission in the event of unfavorable screwdriving conditions. Instead of this, the desired final screw connection state is approached step by step, in a controlled manner.