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:
Oct. 17, 2017
Filed:
Feb. 10, 2014
Nittan Valve Co., Ltd., Hadano-shi, Kanagawa, JP;
Osamu Tsuneishi, Hadano, JP;
Masaaki Inoue, Hadano, JP;
NITTAN VALVE CO., LTD., Hadano-shi, JP;
Abstract
With a poppet valve using a coolant, maximum combustion efficiency is realized by adjusting relative values of a heat insulation effect and a heat dissipation effect. From the inside of a head portion () to a stem portion () of a hollow poppet valve () a heat insulating space (S) and a cooling portion (S) loaded with a coolant (), separated from each other by a partition (), are formed. By properly setting an installation position and a vertical length of the partition () according to a type of vehicle for which the valve is used, appropriate heat insulation effect and heat dissipation effect are obtained. Further, by the partition (), mechanical or thermal strength of the poppet valve in which the heat insulating space (S) and the cooling portion (S) are formed is increased.