Opening and closing valve for high-pressure gas
AssigneeHonda Motor Co., Ltd.
InventorsTaneaki Miura, Hiroyasu Ozaki, Koichi Takaku, Koichi Kato
Life of this patent
Estimating the term…
Abstract
A pilot valve is provided with a conical first contact surface, and a pilot valve seat is provided with an annular second contact surface of which an initial contact portion with respect to the first contact surface has a circular-arc cross-section. The first contact surface is formed of a resin with elasticity, and the second contact surface is formed of metal. When a pressure-contact load is small, the first contact surface and the second contact surface come into line-contact with each other. When a pressure-contact load increases, the first contact surface and the second contact surface come into plane-contact with each other.
Claims4
An apparatus, comprising:
- an opening and closing valve configured to communicate high-pressure hydrogen gas that opens and closes a passageway by causing a valve body and a valve seat, which are coaxially disposed, to come into contact with or separate from each other,
- wherein the valve body includes a conical first contact surface and is biased by a biasing member, and the valve seat includes an annular second contact surface of which an initial contact portion with respect to the conical first contact surface has a circular-arc cross-section,
- wherein one of the conical first contact surface and the annular second contact surface is formed of polyamide-imide, and the other thereof is formed of metal,
- wherein the passageway comprises a diameter ranging from 3 to 8 millimeters,
- wherein the conical first contact surface comprises a conical angle ranging from 60° to 120°, and
- wherein the circular-arc cross-section comprises a curvature radius ranging from 0.1 to 0.5 millimeters.
An apparatus, comprising:
- an opening and closing valve configured to communicate high-pressure hydrogen gas that opens and closes a passageway by causing a valve body and a valve seat, which are coaxially disposed, to come into contact with or separate from each other,
- wherein the valve seat includes a conical first contact surface and the valve body includes an annular second contact surface biased by a biasing member, and the annular second contact surface includes an initial contact portion with respect to the conical first contact surface, the initial contact portion having a circular-arc cross-section,
- wherein one of the conical first contact surface and the annular second contact surface is formed of polyamide-imide, and the other thereof is formed of metal,
- wherein the passageway comprises a diameter ranging from 3 to 8 millimeters,
- wherein the conical first contact surface comprises a conical angle ranging from 60° to 120°, and
- wherein the circular-arc cross-section comprises a curvature radius ranging from 0.1 to 0.5 millimeters.
Dependencies are inferred from the claim text.