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This patent describes a gasket for an alkaline dry cell which is injection moulded in 6-12 nylon, and is designed to inhibit crack formation occurring when a collector is inserted through the central boss. The problem is overcome by using recycled polyhexamethylene dodecamide resin, which has previo
Change-over valve mechanisms are often assembled on a manifold base which contains a number of fluid inlet and outlet passages. These supply and discharge pressurised fluids from ports on the mechanism through separate pipes. A gasket is usually provided between the manifold base and the change-over
the bearing. This circumferentially uniform fluid pressure, by itself, or in combination with a flexible lip (44), prevents contaminant ingress between the rotating shaft and the end-cap of the bearing housing. The structure (15) that creates the tangential fluid-flow is part of the removable cartri