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:
May. 05, 2026
Filed:
Apr. 03, 2023
Kubota Corporation, Osaka, JP;
Tamon Tanaka, Sakai, JP;
Junya Ikai, Sakai, JP;
Kyota Inoue, Sakai, JP;
Atsushi Tanaka, Sakai, JP;
Kazuyuki Chuma, Sakai, JP;
KUBOTA CORPORATION, Osaka, JP;
Abstract
A cylinder head structure that can increase the rigidity of an area corresponding to an area between cylinder bores and improve a sealing force of an inter-bore corresponding portion positioned above between adjacent cylinders when enhancing the sealing force between a cylinder block and the cylinder head to improve engine output. The cylinder head structure includes: insertion walls through which right and left fastening bolts arranged between adjacent cylinders pass; a head upper wall connecting upper end portions of a pair of the insertion walls; and a cylinder head bottom wall, and a head cooling water channel is surrounded by those four walls (insertion walls, head upper wall, cylinder head bottom wall), and a vertical wall in a state of extending left and right spanning the head upper wall and the cylinder head bottom wall to block the head cooling water channel is formed between the pair of insertion walls.