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. 18, 1986
Filed:
May. 13, 1983
Applicant:
Inventor:
Rainer Bitzer, Weissach, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25B / ; G06G / ;
U.S. Cl.
CPC ...
364552 ; 29407 ; 81467 ; 81480 ; 173 12 ;
Abstract
Backwards counters (11,12) are preset with upper and lower limits of the angle through which screws are to be driven, the counters being loaded when a certain value of torque is reached, at which time counting down begins with each increment of rotary angle. When the operation is completed in the usual way after reaching a limit value of torque, the increasing interval between count pulses is detected by a delay circuit (7) and counting is stopped. A logic circuit (15) shows whether the screw connection is satisfactory or whether it is underdriven or overdriven.