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An oil seal is described that has a pair of concentric seal lips contained in a rotating housing and a stationary flange between them. The inner lip does not contact the stationary flange when the shaft is stationary but moves to close the gap, presumably due to centrifugal force. A wide selection of geometries is illustrated.
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## Fuqing Xiaguang Lighting Co Ltd, China A new seal wire for glass is described in this patent. It has an outer iron layer instead of copper on the traditional dumet core wire. The weight ratio between iron and alloy in the whole glass seal wire is controlled, so that the expansion coefficient of
An oil seal is described that has a pair of concentric seal lips contained in a rotating housing and a stationary flange between them. The inner lip does not contact the stationary flange when the shaft is stationary but moves to close the gap, presumably due to centrifugal force. A wide selection o