Pressurized gas tank

Patent metadata

Field	Value
Publication number	US-2022154826-A1
Application number	US-202117524070-A
Country	US
Kind code	A1
Filing date	Nov 11, 2021
Priority date	Nov 13, 2020
Publication date	May 19, 2022
Grant date	—

Abstract

A tank for pressurized gas such as hydrogen, comprises a paste sealant, a sealing envelope, and a base comprising a recess accommodating a neck. A substantially annular external cavity is between a convex surfaces of the neck and a concave surfaces of the recess A substantially annular inner cavity is between a concave surface of the neck and a convex surface of the recess. The paste sealant occupies the annular external and annular inner cavities uniformly and thus ensures the mechanical strength and the gas seal between the sealing envelope and the base. The sealing envelope comprises a body and a neck on the surfaces of which at least two angularly equidistant protrusions extend radially.

First claim

1 . A sealing envelope for a pressurized gas tank, comprising:
a body that is hollow delimits a volume, and is pierced by an opening; and a neck that is solid and tubular along an axis surrounding the opening, and the neck comprising a cylindrical convex surface and a cylindrical concave surface, wherein the neck comprises at least two radially extending protrusions, angularly equidistant on the cylindrical convex surface and/or on the cylindrical concave surface.

2 . The sealing envelope according to claim 1 , wherein a largest distance between a protrusion of the at least two radially extending protrusions and a distal end of the neck is less than or equal to 50% of a height of the neck.

3 . The sealing envelope according to claim 1 , wherein a largest distance between a protrusion of the at least two radially extending protrusions and a distal end of the neck is less than or equal to 25% of a height of the neck.

4 . The sealing envelope according to claim 1 , wherein a largest distance between a protrusion of the at least two radially extending protrusions and a distal end of the neck is less than or equal to 10% of a height of the neck.

5 . The sealing envelope according to claim 1 , wherein the at least two radially extending protrusions comprise at least three radially extending protrusions.

6 . The sealing envelope according to claim 1 , wherein the at least two radially extending protrusions comprise at least six radially extending protrusions.

7 . The sealing envelope according to claim 1 , wherein all protrusions of the at least two radially extending protrusions are dome-shaped, with a circular or oval base, or straight-lined, or rib-shaped parallel to the axis.

8 . The sealing envelope according to claim 1 , wherein all protrusions of the at least two radially extending protrusions are arranged in at least two distinct planes perpendicular to the axis and wherein each plane comprises at least two radially extending protrusions.

9 . The sealing envelope according to claim 1 , wherein all protrusions of the at least two radially extending protrusions extend tangentially along an angular extent of less than or equal to 10 degrees, and axially along an axial extent strictly less than a height of the neck.

10 . The sealing envelope according to claim 1 , wherein all protrusions of the at least two radially extending protrusions extend tangentially along an angular extent of less than or equal to 5 degrees, and axially along an axial extent strictly less than a height of the neck.

11 . The sealing envelope according to claim 1 , wherein all protrusions of the at least two radially extending protrusions extend tangentially along an angular extent of less than or equal to 3 degrees, and axially along an axial extent strictly less than a height of the neck.

12 . The sealing envelope according to claim 1 , wherein, each protrusion of the at least two radially extending protrusions has a radial extent, all radial extents of each of the protrusions are within a range of +1-10% of each other.

13 . The sealing envelope according to claim 12 , wherein all radial extents of the at least two radially extending protrusions are less than 2 mm.

14 . The sealing envelope according to claim 12 , wherein all radial extents of the at least two radially extending protrusions are between 0.2 and 0.8 mm.

15 . The sealing envelope according to claim 12 , wherein all radial extents of the at least two radially extending protrusions are equal to 0.5 mm.

16 . A tank for pressurized gas such as hydrogen, comprising:
a paste sealant; the sealing envelope according to claim 1 ; and a base of cylindrical shape about the axis comprising a tubular recess, hollow along the axis, the tubular recess comprising a cylindrical concave surface and a cylindrical convex surface, wherein the tubular recess accommodates the neck, a diameter of the concave surface of the tubular recess being greater than a diameter of the convex surface of the neck so as to define an annular external space between the convex surface of the neck and the concave surface of the tubular recess, a diameter of the convex surface of the tubular recess being smaller than a diameter of the concave surface of the neck so as to define an annular inner space between the concave surface of the neck and the convex surface of the tubular recess, the paste sealant occupying the annular external space and the annular inner space uniformly.

17 . The tank according to claim 16 , wherein, each protrusion of the at least two radially extending protrusions has a radial extent, a difference between a radius of the convex surface of the neck and a radius of the concave surface of the tubular recess is equal to a greater radial extent and wherein a difference between the radius of the concave surface of the neck and the radius of the convex surface of the tubular recess is equal to the greater radial extent.

Assignees

• Faurecia Systemes Dechappement

Inventors

• Godard Yannick
• Bachelard Nicolas

Classifications

• F17C2209/227

  by adhesive means · CPC title

• F17C1/00

  Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge (pressurised apparatus for purposes other than storage, see the relevant subclasses such as A62C, B05B; associated with vehicles, see the appropriate subclass of classes B60 - B64; pressure vessels in general F16J12/00 {; autoclaves B01J3/04; tank vehicles B60P3/22; railway tank wagons for carrying fluent materials B61D5/00; accumulators for supplying fluid under pressure F15B1/04; liquefied gas stoves F24C3/00}) · CPC title

• F17C13/002 Primary

  for vessels under pressure (F17C13/008 and F17C13/02 - F17C13/12 take precedence) · CPC title

• F17C2223/036

  Very high pressure (>80 bar) · CPC title

• F17C2270/0168

  by vehicles · CPC title