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. 24, 2026
Filed:
Oct. 09, 2020
Robert Bosch Gmbh, Stuttgart, DE;
Friedrich Howey, Ditzingen, DE;
Dirk Schnittger, Ludwigsburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for operating a fuel cell system, in which method a supply of air to a fuel cell stack () is interrupted intermittently, in particular in the event of a standstill of the system, by means of a pressure-controlled shutoff valve (), which comprises a valve element (), which valve element can be moved back and forth between two end positions and is preloaded toward a sealing seat () by means of the spring force of a closing spring (). According to the invention, in at least one of the two end positions, the valve element is held in the end position in question additionally by means of the magnetic force of an electromagnet () and/or of a permanent magnet (), the electromagnet () and/or the permanent magnet () interacting with a magnetic or magnetizable part () of the valve element (). The invention further relates to a shutoff valve () suitable for carrying out the method according to the invention and to a fuel cell stack () having at least one shutoff valve () according to the invention.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile