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. 04, 2025
Filed:
Feb. 15, 2024
Michael I. Keller, Alexandria, VA (US);
Michael Ira Keller, Alexandria, VA (US);
Andrew E. Meyer, Harpers Ferry, WV (US);
William R. Bandy, Gambrills, MD (US);
Sidney Lynn Reed, Lynchburg, VA (US);
Lean-Burn Combustion, Inc., Alexandria, VA (US);
Abstract
An automotive internal combustion engine piston is formed to have a bowl in the piston crown, at least one micro chamber formed in a side surface of the piston body at a position lower than a floor of the bowl, and extended orifices to provide 2-way communication of gaseous materials between the micro chambers and bowl. The micro chamber volume is defined by a removable casting core that incorporates a strut to secure the core at the circumference of the piston body in the casting mold. Subsequent to casting and removal of the core material, the cavity from the strut to secure the core is prepared to receive a tapered thread plug that is sealed by circumferential friction stir welding on the outer diameter of the piston body. The micro chamber is thereby isolated except for the extended orifice to the bowl.