Patent ID: 8251373
Filing Date: 2012-08-28
Classification: F16J,H01M,Y02E

Abstract:
1. A method of improving the performance and durability of a seal within a hydrogen storage or hydrogen supply system, in which substantially only hydrogen gas is stored or supplied, the method comprising: providing a spring-energized and plastic coated radial seal that comprises a plastic jacket and a spring, the plastic jacket comprising a pair of flexible sealing lips that each comprise an inner surface at least partially defining a groove and an outer surface that includes a load point, the spring being received in the groove and comprising a pair of beam legs that provide a radial load force to the to the flexible sealing lips; providing a component of the hydrogen storage or hydrogen supply system that comprises a seal mating surface against which the load point of the spring-energized and plastic coated radial seal engages to form a seal against the loss of hydrogen gas from the component; treating the seal mating surface with a procedure to provide the mating surface with a low surface roughness appropriate for sealing hydrogen gas in combination with the spring-energized and plastic coated radial seal, the procedure comprising at least one of: (a) applying a coating of diamond-like-carbon or nanocrystalline diamond over the seal mating surface for engagement with the load point; (b) chemically polishing the seal mating surface by isotropic finishing; or (c) electrochemically polishing the seal mating surface by electropolishing.