Cylinder in particular for hydrogen tank cycling facility

Patent metadata

Field	Value
Publication number	US-12546296-B2
Application number	US-202418625640-A
Country	US
Kind code	B2
Filing date	Apr 3, 2024
Priority date	Apr 3, 2023
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A hydraulic cylinder, in particular for a hydrogen tank pressurization installation, including a cylindrical body of longitudinal axis having a first low-pressure cylindrical body portion and a second high-pressure cylindrical body portion, a piston being mounted in the first cylindrical body portion and being mounted at a first end of a piston rod slidably extending in the second cylindrical body portion. A second end of the rod opposite the first end carries a removable cartridge slidably sealed in the second part of the cylindrical body, the second part of the cylindrical body being sealed by a removable shutter member arranged longitudinally opposite the removable cartridge.

First claim

The invention claimed is:

1 . A hydraulic cylinder for a hydrogen tank pressurization installation, comprising a cylindrical body of longitudinal axis having a first low-pressure cylindrical body portion and a second high-pressure cylindrical body portion, a piston being mounted in the first cylindrical body portion and being mounted at a first end of a piston rod slidably extending in the second cylindrical body portion, wherein a second end of the rod opposite the first end carries a removable cartridge slidably sealed in a second part of the cylindrical body, the second part of the cylindrical body being sealed by a removable shutter member arranged longitudinally opposite the removable cartridge,
wherein the shutter member is locked in translation, along a second direction of the longitudinal direction, by an annular yoke screwed onto a thread of an internal surface of the second part of the cylindrical body.

2 . The hydraulic cylinder according to claim 1 , wherein the annular yoke comprises means for attaching a yoke clamping/unclamping member.

3 . The hydraulic cylinder according to claim 1 , wherein the removable cartridge comprises an annular seal locked longitudinally by annular clamping rings.

4 . The hydraulic cylinder according to claim 1 , wherein the cartridge is locked by a pin device on a longitudinal extension of the rod inserted in the cartridge.

5 . The hydraulic cylinder according to claim 1 , wherein the first portion of the cylindrical body may comprise a first chamber and a second chamber separated from each other by the piston, the first chamber and the second chamber being intended to be supplied with a first fluid.

6 . The hydraulic cylinder according to claim 1 , wherein the shutter member comprises an orifice for passage of a pressurized fluid housed in the second cylindrical body portion.

7 . A hydraulic facility comprising at least one hydraulic cylinder according to claim 1 , wherein the first cylindrical body portion is connected to a first circuit of a first low-pressure fluid and the second cylindrical body portion is connected to a second circuit of a second high-pressure fluid.

8 . The hydraulic facility of claim 7 , wherein the shutter member comprises at least one longitudinally extending channel fluidly connecting an interior of the second cylindrical body portion to the second circuit.

Assignees

• Commissariat Energie Atomique

Inventors

• Carriere Stéphane
• Villalonga Stéphane

Classifications

• F04B53/10

  Valves; Arrangement of valves · CPC title

• F04B9/117

  the pumping members not being mechanically connected to each other · CPC title

• F04B2015/0822

  Hydrogen · CPC title

• F04B19/003 Primary

  free-piston type pumps · CPC title