A method of creating a fluid meter housing is disclosed wherein molten material is injected into a cavity formed between a core and a mold. After cooling, the material assumes the shape of the housing and contains the core. Upon heating, the core melts and may be removed from the interior of the hou...http://www.google.de/patents/US6426027?utm_source=gb-gplus-sharePatent US6426027 - Method of injection molding for creating a fluid meter housing
