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:
Jan. 04, 2022
Filed:
Feb. 16, 2018
Mahle International Gmbh, Stuttgart, DE;
Daniel Hrdina, Stuttgart, DE;
Abstract
A method for producing a piston may include providing a blank of a piston base member with an outer peripheral joining face, an inner peripheral joining face which may be expanded in a direction of a base region of a combustion bowl, and a lower cooling channel portion which may extend between the outer and inner peripheral joining faces, wherein at least one of (i) at least one of the outer and inner peripheral joining faces and (ii) the lower cooling channel portion may be not subsequently processed. The method may then include providing a blank of a piston ring element with an outer annular joining face, an inner annular joining face, and an upper cooling channel portion which may extend between the outer and inner annular joining faces, wherein at least one of (i) at least one of the outer and inner annular joining faces and (ii) the upper cooling channel portion may be not subsequently processed. The method may then include joining the blanks via the outer and inner peripheral joining faces and the outer and inner annular joining faces to form a piston blank in such a manner that, at least in the base region of the combustion bowl, a part-region of the expanded inner peripheral joining face of the blank of the piston base member may remain free. The method may further include subsequently at least partially processing the piston blank to form the piston with the part-region of the expanded inner peripheral joining face being removed.