Valve device

Patent metadata

Field	Value
Publication number	US-10017050-B2
Application number	US-201515118286-A
Country	US
Kind code	B2
Filing date	Feb 10, 2015
Priority date	Feb 12, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A valve device includes a float and a case storing the float. The valve device forms a part of a ventilation passage of a fuel tank. The case includes a partition wall which divides inside the case into an upper chamber and a storage chamber to house the float. The partition wall includes a rising portion opened and closed by the float, and a rising portion which surrounds the opening in the upper chamber. A dividing portion is formed in the rising portion to guide liquid to flow downward, and an upper surface of the partition wall outside the rising portion is formed with a gradient such that a side of the dividing part is a low part of an inclined portion thereof.

First claim

What is claimed is:

1. A valve device forming a part of a ventilation passage of a fuel tank, comprising:
a float; and
a case including
a storage chamber storing the float,
an upper chamber arranged above the storage chamber, and
a partition wall dividing an inside of the case into the upper chamber and the storage chamber, the partition wall including
an opening opened and closed by the float, and
a rising portion surrounding the opening in the upper chamber and having an outer circumferential portion with a cylindrical shape, an inner circumferential portion with a funnel shape, and a dividing portion having a groove extending from the outer circumferential portion to the opening through the inner circumferential portion for guiding liquid to flow downward,

wherein a gap is formed between the outer circumferential portion of the rising portion and an outer edge of the partition wall in a circumferential direction of the opening, and an upper surface of the partition wall outside the rising portion has a gradient such that a side of the dividing portion is a low part of an inclined portion thereof.

2. The valve device according to claim 1 , wherein the dividing portion is formed at a position farthest away from an exhaust port.

3. The valve device according to claim 1 , wherein another dividing portion for exhausting is formed at a position between an exhaust port of the upper chamber and the opening, and
a width of the another dividing portion is larger than that of the dividing portion.

4. The valve device according to claim 1 , wherein the inner circumferential portion of the rising portion has a gradient such that the opening is a lower side of the gradient.

5. The valve device according to claim 3 , wherein the another dividing portion has another groove extending in a radial direction of the rising portion and communicating with the gap, the another dividing portion being arranged opposite to the dividing portion in respect to the opening.

6. The valve device according to claim 5 , wherein the gap is defined by the outer circumferential portion of the rising portion, the outer edge of the partition wall, and the upper surface of the partition wall, and communicates with the dividing portion and the another dividing portion to guide the liquid toward the opening.

Assignees

• Nifco Inc

Inventors

• Ogose Kensuke

Classifications

• B60K2015/03576

  Venting during filling the reservoir · CPC title

• B60K15/03519 Primary

  Valve arrangements in the vent line · CPC title

• F16K24/044 Primary

  the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve · CPC title

• B60K2015/03289

  Float valves; Floats therefor · CPC title

• F16K27/02

  of lift valves (for reducing the flow resistance of screw-spindle lift-valves F16K1/06) · CPC title