Gm Global Technolgoy Operations, Inc.

Hans Weidner

Rainer Pechtold

Dimitri A Podorashi

Wolfgang Markard

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.

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Darmstadt, Germany

Hans Weidner