公开(公告)号：US10295074B2

公开(公告)日：2019-05-21

申请号：US15352170

申请日：2016-11-15

Applicant: PIOLAX, INC.

Inventor： Kosei Yamaguchi

IPC: B60K15/03 ,  F16K17/196 ,  F16K39/02 ,  F16K15/02 ,  F16K27/02 ,  F16K15/14 ,  B60K15/035

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.

公开(公告)号：US20140216573A1

公开(公告)日：2014-08-07

申请号：US14241805

申请日：2012-03-30

Applicant: PIOLAX, INC.

Inventor： Kosei Yamaguchi

IPC: F16K17/196 ,  B60K15/035

CPC classification number: F16K17/196 ,  B60K15/03519 ,  B60K2015/03276 ,  B60K2015/03282 ,  B60K2015/03296 ,  B60K2015/0358 ,  F02M37/0029 ,  F02M37/20 ,  Y10T137/7777 ,  Y10T137/778

Abstract: A check valve includes a casing including a positive pressure valve seat, a positive pressure valve urged by a positive pressure valve spring and including a negative pressure valve seat, and a negative pressure valve assembled to the positive pressure valve and urged by a negative pressure valve spring, where the positive pressure valve includes an inner cylinder, an outer cylinder that is connected with an outer circumference of the inner cylinder via ribs, and passages formed between the inner cylinder and the outer cylinder, where the positive pressure valve spring is disposed the casing and the outer cylinder, and where the negative pressure valve spring is disposed in the inner cylinder.

Abstract translation: 止回阀包括壳体，其包括正压阀座，由正压阀弹簧施力并包括负压阀座的正压阀和组合到正压阀并由负压阀推动的负压阀 弹簧，其中正压阀包括内筒，通过肋与内筒的外周连接的外筒，以及形成在内筒和外筒之间的通道，其中设置有正压阀弹簧 壳体和外筒，并且负压阀弹簧设置在内筒中。

公开(公告)号：US10221955B2

公开(公告)日：2019-03-05

申请号：US15345650

申请日：2016-11-08

Applicant: PIOLAX, INC.

Inventor： Kosei Yamaguchi

IPC: F16K17/196 ,  F16K15/02 ,  F16K27/02 ,  B60K15/035 ,  B60K15/03

Abstract: One embodiment relates to a valve device. The valve device includes: a valve case; a valve element slidably disposed within a valve chamber defined in the valve case; and a positive pressure spring configured to urge the valve element toward a valve seat in the valve case. The valve element includes an outer circumferential portion having a predetermined length extending along an inner circumference of the valve chamber. The outer circumferential portion includes plural opening portions. And, ribs project from the inner circumference of the valve chamber to enter into the opening portions, thereby limiting movement of the positive pressure spring in a radial direction.

公开(公告)号：US09784377B2

公开(公告)日：2017-10-10

申请号：US14878101

申请日：2015-10-08

Applicant: PIOLAX, INC.

Inventor： Kosei Yamaguchi

IPC: F16K15/02 ,  F16K17/196 ,  F16K24/04 ,  F16K24/06 ,  F16K27/02

CPC classification number: F16K15/025 ,  F16K15/026 ,  F16K17/196 ,  F16K24/04 ,  F16K24/06 ,  F16K27/0209

Abstract: An embodiment provides a check valve including a valve case, a positive pressure valve having a resin ring sealing member, and a resin negative pressure valve. The positive pressure valve and the negative pressure valve are disposed in the valve case. The positive pressure valve includes a first mount surface and a second mount surface disposed on an inner diameter side of the first mount surface. In the valve case, a presser cap is mounted on the positive pressure valve so as to sandwich the ring sealing member and the negative pressure valve with the first mount surface and the second mount surface of the positive pressure valve.