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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.:

US 9689506 B1

PDFFull Text
Date of Patent:
Jun. 27, 2017

Filed:

Mar. 26, 2013

Hollow poppet valve

Applicant:

Nittan Valve Co., Ltd., Hadano-shi, Kanagawa, JP;

Inventors:

Koichi Homma, Hadano, JP;

Hiroki Onuma, Hadano, JP;

Jin Hasegawa, Hadano, JP;

Assignee:

NITTAN VALVE CO., LTD., Hadano-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Carlos A Rivera

Assistant Examiner:

Syed O Hasan

Int. Cl.
CPC ...
F01P 1/08 (2006.01); F01P 1/06 (2006.01); F01L 3/00 (2006.01); F16K 49/00 (2006.01); F01L 3/14 (2006.01); F01L 3/16 (2006.01); F16K 1/12 (2006.01); F01L 3/20 (2006.01); F16K 1/32 (2006.01); B21K 1/22 (2006.01); B23P 15/00 (2006.01);
U.S. Cl.
CPC ...
F16K 49/007 (2013.01); F01L 3/14 (2013.01); F01L 3/16 (2013.01); F01L 3/20 (2013.01); F16K 1/12 (2013.01); F16K 1/32 (2013.01); B21K 1/22 (2013.01); B23P 15/002 (2013.01); Y10T 137/6579 (2015.04);
Abstract

A hollow poppet valve () is provided with an additional flange shape cavity (S), in addition to an ordinary valve head cavity (S) formed in the valve head () of the valve () in communication with a valve stem cavity (S) formed in a valve stem (). A coolant () is loaded in the cavities to facilitate dissipation of heat out of the valve. This flange shape cavity (S) extends radially outwardly round a bottom portion of the valve head cavity (S), extending close to a valve seat, thereby significantly facilitating heat transfer between the coolant () and the valve seat of the valve, yet, since the flange shape cavity (S) does not influences the thickness of other regions of the valve, it does not degrade durability of the valve.

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