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. 06, 1992
Filed:
May. 21, 1990
Harald Ruoff, Stuttgart, DE;
Raimund Leistenschneider, Sindelfingen, DE;
Abstract
A method and apparatus for manually controlling a windscreen wiper drive motor in a motor vehicle in several speed steps, by which the drive motor can also be automatically switched from a manually switched-on speed step into a lower speed step when the speed passes through a predetermined threshold value of the motor vehicle travelling speed from a higher travelling speed. The apparatus and method provide automatic switching of the drive motor from each manually switched-on speed step into a lower speed step when the speed passes through the threshold value, cancellation of the current automatic switching until the speed again passes through the threshold value from a higher travelling speed when the control switch has been operated below the threshold value of the travelling speed and after the drive motor has been automatically switched into a lower speed step, and switching-on of each speed step of the drive motor selected by this operation of the control switch. The automatically switched-on lower speed step can be the next lower one or the system can switch from all switched-on speed steps to a single slow one.