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:
Apr. 12, 1983
Filed:
May. 06, 1980
Wolfgang Kurz, Hemmingen, DE;
Rainer Leunig, Gerlingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The electrical system of a motor vehicle is protected against damage due to voltage sources, either the own battery or an external source, connected with wrong polarity by the combination of a diode and relay switches. In one embodiment, the diode is connected to the battery so that current flows only when the battery is connected with the correct polarity. The relay coil connected in series with the diode controls contacts which connect the battery to the rest of the circuit only when current flows through the diode. Alternatively, or in conjunction with this type of circuit, a shunting diode can be provided through which current flows only when the battery is connected with incorrect polarity. When current flows through this shunting diode, it also flows through the contacts of excess current cutout which then open to disconnect the battery from the remainder of the circuit.