公开(公告)号：US10041601B2

公开(公告)日：2018-08-07

申请号：US15309831

申请日：2015-04-24

Applicant: NIFCO INC.

Inventor： Toshio Wada

IPC: F16K24/04 ,  F16K27/02 ,  B60K15/035 ,  F16K15/02

Abstract: A valve device includes a float constituting a lower valve body and a case accommodating the float, and constitutes a part of an airflow passage of a fuel tank. The valve device includes a top portion of the case formed with a first penetration hole, a cylindrical seal body with a part that is fit in the first penetration hole and is sandwiched between the top portion and a sandwich member having a second penetration hole and combined with the top portion from above the top portion, an inside of the seal body communicating with the second penetration hole of the sandwich member, and an upper valve body above the sandwich member and configured to open and close the second penetration hole.

公开(公告)号：US10113514B2

公开(公告)日：2018-10-30

申请号：US15309841

申请日：2015-04-24

Applicant: NIFCO INC.

Inventor： Toshio Wada

IPC: F02M25/08 ,  B60K15/035 ,  F02M37/00 ,  F02M37/20 ,  F16K31/22 ,  F16K24/04 ,  F16K27/02 ,  B60K15/03

Abstract: A valve device forming a portion of a ventilation flow channel of a fuel tank includes a float valve, a case housing the float valve, and an outside member housing the case and including an attachment portion to a fuel tank side. One portion of a cylindrical seal member fitted in a first through hole to communicate an inner portion to a second through hole is pinched between a top portion of the case wherein the first through hole is formed, and a top portion of the outside member wherein the second through hole communicating to an outside of the tank is formed, and a lower end of the cylindrical seal member becomes a valve seat of the float valve.

公开(公告)号：US10279679B2

公开(公告)日：2019-05-07

申请号：US15555850

申请日：2016-03-16

Applicant: NIFCO INC.

Inventor： Toshio Wada

IPC: B60K15/03 ,  B60K15/035 ,  F16K24/04 ,  F02M37/00 ,  F16K31/22 ,  F16K27/02

Abstract: A valve device forming a ventilation flow channel of a fuel tank includes a float valve; an inside case including a valve opening relative to the float valve at an upper portion, and housing the float valve; an outside case receiving the inside case from an upper open end, and provided with a bottom portion; and an attachment portion relative to a tank side. A flow channel which becomes one portion of the ventilation flow channel is formed between a side portion of the inside case and a side portion of the outside case, and a through hole is provided in the side portion of the inside case. Furthermore, an engagement claw relative to the outside case is provided directly above the through hole.

公开(公告)号：US10161538B2

公开(公告)日：2018-12-25

申请号：US15118237

申请日：2015-02-10

Applicant: NIFCO INC.

Inventor： Toshio Wada

IPC: F16K24/04 ,  F02M21/02 ,  B60K15/035 ,  F02M25/08 ,  B60K15/03

Abstract: A valve device includes a float body and a valve body provided in an upper portion of the float body to obliquely move. The valve body includes a seal portion that closes a valve opening formed in a case when the float rises, an engaging portion serving as a linkage portion with respect to the float body, and an abutting portion that abuts on a vicinity of the valve opening when inclining obliquely. An area of the abutting portion in the horizontal direction is made smaller than that of the seal portion such that the abutting portion laterally protrudes from the seal portion.

公开(公告)号：US10253894B2

公开(公告)日：2019-04-09

申请号：US15506411

申请日：2015-06-18

Applicant: NIFCO INC.

Inventor： Toshio Wada

IPC: F16K15/03 ,  B60K15/04 ,  F02M37/00 ,  B67D7/04 ,  F16K27/02 ,  B60K15/03

Abstract: A fuel tank check valve, which can prevent one portion of a coil portion of a torsion coil spring from being stuck on a stepped portion of a pivot includes a cylindrical member defining a flow channel for a fuel fluid; a flap axially supported on the cylindrical member through a pivot; and a torsion coil spring urging the flap in a closing direction. The pivot includes a large diameter portion around which a coil portion of the torsion coil spring is wound; and a first small diameter portion and a second small diameter portion coaxial with each other, and projecting into a shaft hole provided in either one of the cylindrical member or the flap. The first small diameter portion adjacent to the large diameter portion is off-centered to a side where the torsion coil spring presses against the pivot relative to the large diameter portion.