Valve device

Patent metadata

Field	Value
Publication number	US-11932100-B2
Application number	US-202017784906-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Dec 24, 2019
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

There is provided a valve device including: a housing in which a valve chamber is provided on a lower side and a ventilation chamber is provided on an upper side via a partition wall, the partition wall being formed with a valve hole; a float valve; and a pressure adjusting valve. An accommodation portion is provided in a protruding manner from a surface of the partition wall. An accommodating space configured to accommodate the pressure adjusting valve is formed on an inner side of the accommodation portion, and an outer space is formed on an outer side of the accommodating space. The accommodation portion is formed with an opening through which the accommodating space and the outer space communicate with each other.

First claim

The invention claimed is:

1. A valve device comprising:
a housing in which a valve chamber is provided on a lower side and a ventilation chamber is provided on an upper side via a partition wall, the valve chamber communicating with an inside of a fuel tank, the ventilation chamber communicating with an outside of the fuel tank, and the partition wall being formed with a valve hole through which the valve chamber and the ventilation chamber communicate with each other;
a float valve accommodated in the valve chamber so as to be movable up and down and configured to open and close the valve hole; and
a pressure adjusting valve configured to adjust pressure and accommodated in the ventilation chamber so as to be movable up and down,
wherein a first valve seat which the pressure adjusting valve is to come into contact with and is to separate from is formed from a peripheral edge of the valve hole on a side of the ventilation chamber, and a second valve seat which the float valve is to come into contact with and is to separate from is formed from a peripheral edge of the valve hole on a side of the valve chamber,
wherein an accommodation portion is provided in a protruding manner from a surface of the partition wall on the side of the ventilation chamber,
wherein when the accommodation portion is viewed from an axial direction of the pressure adjusting valve, an accommodating space configured to accommodate the pressure adjusting valve is formed on an inner side of the accommodation portion, and an outer space is formed on an outer side of the accommodating space,
wherein the accommodation portion is formed with an opening through which the accommodating space and the outer space communicate with each other,
wherein the opening has a slit shape extending in the axial direction in a range from a lower end to an upper end of the accommodation portion, and
wherein the opening having the slit shape has a shape which gradually expands from a lower end side to the upper end of the accommodation portion.

2. A valve device comprising:
a housing in which a valve chamber is provided on a lower side and a ventilation chamber is provided on an upper side via a partition wall, the valve chamber communicating with an inside of a fuel tank, the ventilation chamber communicating with an outside of the fuel tank, and the partition wall being formed with a valve hole through which the valve chamber and the ventilation chamber communicate with each other;
a float valve accommodated in the valve chamber so as to be movable up and down and configured to open and close the valve hole; and
a pressure adjusting valve configured to adjust pressure and accommodated in the ventilation chamber so as to be movable up and down,
wherein a first valve seat which the pressure adjusting valve is to come into contact with and is to separate from is formed from a peripheral edge of the valve hole on a side of the ventilation chamber, and a second valve seat which the float valve is to come into contact with and is to separate from is formed from a peripheral edge of the valve hole on a side of the valve chamber,
wherein an accommodation portion is provided in a protruding manner from a surface of the partition wall on the side of the ventilation chamber,
wherein when the accommodation portion is viewed from an axial direction of the pressure adjusting valve, an accommodating space configured to accommodate the pressure adjusting valve is formed on an inner side of the accommodation portion, and an outer space is formed on an outer side of the accommodating space,
wherein the accommodation portion is formed with an opening through which the accommodating space and the outer space communicate with each other,
wherein a cover wall is disposed outside the accommodating space at a position facing the opening, and both ends of the cover wall are connected to the accommodation portion on both sides of the opening, and
wherein when viewed from the axial direction of the pressure adjusting valve, the cover wall protrudes outward with respect to the accommodation portion.

Assignees

• Piolax Inc

Inventors

• Yajima Kazuki

Classifications

• B60K15/03 Primary

  Fuel tanks · CPC title

• F16K24/042

  actuated by a float · CPC title

• B60K2015/03296

  Pressure regulating valves · CPC title

• F16K24/04 Primary

  for venting only (F16K24/02 takes precedence) · CPC title

• B60K2015/03256

  characterised by special valves, the mounting thereof · CPC title