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. 21, 1997
Filed:
May. 31, 1995
Godo Ozawa, Utsunomiya, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A diesel engine piston, which exhibits high resistance to heat load, has a cooling cavity formed circumferentially around and outwardly of the outer periphery of a reentrant combustion chamber. A cooling liquid inlet passageway through which cooling liquid is supplied is provided in the piston body. The inside diameter of the cooling cavity is smaller adjacent to the top of the piston than adjacent to the bottom of the piston, and the cross-sectional area of the cooling cavity gradually increases from the bottom of the cooling cavity toward the top of the cooling cavity. A funnel wall, which projects downwardly toward the bottom of the piston, serves as the inlet of the cooling liquid inlet passageway. A distributing member, positioned within the cooling cavity directly above the outlet of the cooling liquid inlet passageway, splits the cooling liquid into two streams for passage in opposite directions through two segments of the cooling cavity.