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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 12359748 B1

PDFFull Text
Date of Patent:
Jul. 15, 2025

Filed:

Oct. 17, 2022

Egr valve

Applicant:

Aisan Kogyo Kabushiki Kaisha, Obu, JP;

Inventors:

Mamoru Yoshioka, Susono, JP;

Shinji Kawai, Gifu, JP;

Kazumasa Nakashima, Nagoya, JP;

Assignee:

AISAN KOGYO KABUSHIKI KAISHA, Obu, JP;

Attorney:

Oliff PLC

Primary Examiner:

Marina A Tietjen

Int. Cl.
CPC ...
F16K 41/04 (2006.01); F02M 26/53 (2016.01); F02M 26/54 (2016.01); F02M 26/67 (2016.01); F02M 26/70 (2016.01); F02M 26/72 (2016.01); F02M 26/74 (2016.01); F16J 15/3236 (2016.01); F16J 15/3252 (2016.01); F16J 15/3276 (2016.01); F16K 41/08 (2006.01); F16K 31/04 (2006.01);
U.S. Cl.
CPC ...
F16K 41/04 (2013.01); F02M 26/53 (2016.02); F02M 26/54 (2016.02); F02M 26/67 (2016.02); F02M 26/70 (2016.02); F02M 26/72 (2016.02); F02M 26/74 (2016.02); F16J 15/3236 (2013.01); F16J 15/3252 (2013.01); F16J 15/3276 (2013.01); F16K 31/04 (2013.01); Y02T 10/12 (2013.01);
Abstract

This EGR valve includes: a valve seat and a valve element provided in a flow passage of a housing; a valve shaft that moves the valve element relative to the valve seat; a step motor that drives the valve shaft together with the valve element; a bearing that drivably supports the valve shaft; a seal member having a lip part adjacent to the bearing and contacting the valve shaft to seal between the housing and the valve shaft; a mounting hole to retain the seal member in the housing; and a deposit guard member adjacent to the seal member to prevent deposits from entering into the mounting hole. One end of the seal member is provided with a seal protrusion protruding toward one end of the deposit guard member and contacting with the one end while being deformed to seal between the seal member and the deposit guard member.

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