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:
Jul. 15, 2025
Filed:
May. 31, 2024
Caterpillar Inc., Peoria, IL (US);
James Jay Cress, West Lafayette, IN (US);
Andrew G. Hockett, Austin, TX (US);
Sean J. Moser, Bellingham, WA (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A prechamber sparkplug includes a sparkplug housing forming a prechamber, and an electrode within the prechamber and defining a spark gap with the sparkplug housing. The prechamber sparkplug further includes a valvular element such as a check, a valve, or a tesla valve, structured to preferentially permit ejection of fluids from the prechamber over admission of fluids to the prechamber. Varying relative restriction of fluids into versus out of the prechamber can limit a charge density within the prechamber extending sparkplug service life, particularly in high power density engine applications. Related apparatus and methodology is also disclosed.