Gm Global Technolgoy Operations, Inc.

Dimitri A Podorashi

Rainer Pechtold

Wolfgang Markard

Hans Weidner

Xingcheng Xiao

Leonid Charles Lev

Michael J Lukitsch

Markus Lindner

Thorsten Michler

Axel Junge

A pressure regulator for a hydrogen storage system, wherein the pressure regulator is adapted to operate at temperatures below &#x2212;50&#xb0; C., while minimizing the need for separate sealing elements and O-rings. The pressure regulator includes a main body including an inner cavity bounded by an interior wall, a piston disposed in the inner cavity, the piston including a first channel disposed adjacent a first portion, wherein the first portion is adapted to cooperate with the interior wall to form a seal between the piston and the interior wall, a first biasing device disposed in the first channel, wherein the first biasing device is adapted to exert a force on the first portion of the piston to form a seal between the first portion and the interior wall, and an end cap coupled to the main body thereby enclosing the piston to form an outlet pressure chamber.

Pressure regulator for hydrogen storage system

One exemplary embodiment includes a gas storage tank comprising a structural outer layer, an internal liner layer, an annular boss, and a liquid sealant disposed between the overlapped section of the liner layer and the boss to provide a gas-tight seal.

Gas storage tank comprising a liquid sealant

The performance and durability of static and dynamic seals for hydrogen storage and supply systems has been improved by utilizing a spring-energized and plastic coated radial seal in combination with at least a mating surface that has been treated by one of a variety of procedures. These procedures include applying to the mating surface a low-friction, hard, and hydrogen impervious coating, chemically polishing the mating surface, and electrochemically polishing the mating surface. Each of these procedures significantly reduces, on a microscopic scale, the surface roughness of the mating surface. The seal can thus form a tighter and more gas-tight seal with the smoother mating surface so as to decrease the loss of hydrogen gas across the seal. The smoother mating surface can also improve seal life by reducing seal surface wear.

Seal performance for hydrogen storage and supply systems

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Weiterstadt, Germany

Dimitri A Podorashi