Pressurized gas tank

1. A tank for pressurized gas comprising:

a structure having a cylindrical shape along an axis and including at least one axial opening along the axis;

a base being able to be positioned in said at least one axial opening, and comprising, on an inner side, a housing of revolution shape about the axis and a first fastener, and being pierced with at least one through pipe that is axial along the axis;

a sealing jacket being flexible and tight, able to cover an inner wall of the structure, and comprising a neck able to be received in the housing;

a ring of revolution shape about the axis, and comprising a second fastener able to cooperate with the first fastener in order to assemble the ring with the base, on the inner side, by bringing the ring closer to the base along the axis, so as to progressively press the neck between the ring and the base, wherein the ring comes closer to the base following a movement parallel to the axis from an inside of the tank toward an outside and in that a face of the housing opposite the neck and a face of the ring opposite the neck have a taper; and

a deformable bushing, of revolution shape about the axis, positioned between the face of the ring and the neck.

2. The tank according to claim 1 , where the taper is inclusively between 0° and 45° of half cone angle.

3. The tank according to claim 1 , where the taper is inclusively between 0° and 30° of half cone angle.

4. The tank according to claim 1 , where the taper is inclusively between 0° and 20° of half cone angle.

5. The tank according to claim 1 , where the face of the ring has a centrifugal normal and the taper has an opening toward the inside of the tank.

6. A tank for pressurized gas comprising:

a structure having a cylindrical shape along an axis and including at least one axial opening along the axis;

a base being able to be positioned in said at least one axial opening, and comprising, on an inner side, a housing of revolution shape about the axis and a first fastener, and being pierced with at least one through pipe that is axial along the axis;

a sealing jacket being flexible and tight, able to cover an inner wall of the structure, and comprising a neck able to be received in the housing; and

a ring of revolution shape about the axis, and comprising a second fastener able to cooperate with the first fastener in order to assemble the ring with the base, on the inner side, by bringing the ring closer to the base along the axis, so as to progressively press the neck between the ring and the base, wherein the ring comes closer to the base following a movement parallel to the axis from an inside of the tank toward an outside and in that a face of the housing opposite the neck and a face of the ring opposite the neck have a taper, where the face of the ring has a centripetal normal and the taper has an opening toward the outside of the tank.

7. The tank according to claim 1 , where the face of the ring and/or the face of the housing and/or a face of any bushing opposite the neck and/or at least one face of the neck further comprises at least one annular protuberance.

8. The tank according to claim 1 , further comprising at least one O-ring along the axis, positioned in a groove arranged in a face opposite the neck.

9. The tank according to claim 1 , where the first fastener comprises an inner thread and the second fastener comprises an outer thread.

10. A tank for pressurized gas comprising:

a structure having a cylindrical shape along an axis and including at least one axial opening along the axis;

a base being able to be positioned in said at least one axial opening, and comprising, on an inner side, a housing of revolution shape about the axis and a first fastener, and being pierced with at least one through pipe that is axial along the axis;

a sealing jacket being flexible and tight, able to cover an inner wall of the structure, and comprising a neck able to be received in the housing; and

a ring of revolution shape about the axis, and comprising a second fastener able to cooperate with the first fastener in order to assemble the ring with the base, on the inner side, by bringing the ring closer to the base along the axis, so as to progressively press the neck between the ring and the base, wherein the ring comes closer to the base following a movement parallel to the axis from an inside of the tank toward an outside and in that a face of the housing opposite the neck and a face of the ring opposite the neck have a taper, where the first fastener comprises an outer thread and the second fastener comprises an inner thread.

11. The tank according to claim 1 , where the ring has a noncircular inner profile around the axis, so as to allow the ring to be set in rotation about the axis, using a tool, from the outside of the tank.

12. The tank according to claim 11 , wherein the noncircular inner profile is hexagonal.

13. A vehicle comprising: a tank, the tank comprising the structure, base, sealing jacket, deformable bushing and ring according to claim 1 .