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This invention concerns a multi-layered cylinder-head gasket. An intermediate layer has a variable cross-section around the circumference of the cylinder bores, and may include slits shaped in a circular arc. This helps to optimise the contact pressure of the gasket and reduce bending of the intermediate layer.
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This patent describes a pump for liquid chromatography applications. It is specifically designed to operate without lubricants that could cause contamination of the samples. The seals described are designed to run without lubricant and prevent cross contamination of samples. They are spring energise
A technique for sub-sea intervention operations using a retrievable dynamic seal assembly is described. The dynamic seal can be used to accommodate the movement of a for example, a wireline, slickline, coiled tubing or coiled rod. The seal is selected to suit the individual application and no specif