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. 21, 2019
Filed:
Nov. 15, 2016
Applicant:
Piolax, Inc., Yokohama-shi, JP;
Inventor:
Kosei Yamaguchi, Yokohama, JP;
Assignee:
PIOLAX, INC., Yokohama-Shi, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K 15/03 (2006.01); F16K 17/196 (2006.01); F16K 39/02 (2006.01); F16K 15/02 (2006.01); F16K 27/02 (2006.01); F16K 15/14 (2006.01); B60K 15/035 (2006.01);
U.S. Cl.
CPC ...
F16K 17/196 (2013.01); B60K 15/03519 (2013.01); F16K 15/026 (2013.01); F16K 15/148 (2013.01); F16K 27/0209 (2013.01); F16K 39/024 (2013.01); B60K 2015/03256 (2013.01); Y10T 137/7773 (2015.04);
Abstract
A check valve includes a valve case, a positive pressure valve, a spring, and a negative pressure valve. The positive pressure valve is slidably disposed in a valve chamber of the valve case. The spring urges the positive pressure valve to abut on a positive pressure valve seat of the valve case. The negative pressure valve is on the positive pressure valve to abut on a negative pressure valve seat of the positive pressure valve. The negative pressure valve closes a communicating passage in the positive pressure valve in a normal state, and opens it when a pressure in the fuel tank falls to a predetermined value or less.