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:
Aug. 26, 2025
Filed:
Apr. 26, 2022
Applicant:
Robert Bosch Gmbh, Stuttgart, DE;
Inventors:
Matthias Blankmeister, Heiligenhaus, DE;
Stephan Kaske, Sternenfels Diefenbach, DE;
Assignee:
ROBERT BOSCH GMBH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/54 (2006.01); H01T 13/16 (2006.01); H01T 13/20 (2006.01);
U.S. Cl.
CPC ...
H01T 13/54 (2013.01); H01T 13/16 (2013.01); H01T 13/20 (2013.01);
Abstract
A pre-chamber spark plug. The pre-chamber spark plug includes a central electrode and at least one ground electrode, a housing, an insulator that electrically insulates the central electrode from the housing, a cap having at least one cap hole, and a pre-chamber having a defined gas volume. The insulator includes a base portion which protrudes into the pre-chamber in the axial direction over a base length and which is in contact with the gas volume, and wherein a ratio of the gas volume to the base length is in a range of: R=40 to 300 mm.