专利名称：Apparatus for the manufacture of expansion
bellows
发明人：Paul Mazier申请号：US05/904414申请日：19780510公开号：US04193280A公开日：19800318
摘要：An apparatus for the manufacture, by the hydroforming process, of expansionbellows for pipelines or the like, the apparatus being of the type comprising, forcontracting longitudinally a sleeve to be formed, an actuating chamber of annularconfiguration defined by a rigid sleeve associated with the sleeve to be formed, acylindrical skirt, and two sealing rings, one of which constitutes one of the supports forthe sleeve to be formed. The apparatus is characterized in that the annular chamber isarranged, not outside, but inside the rigid sleeve, in such a manner that the hydroformingcircuit is completely separate from the actuating circuit.
申请人：SOUPLESSE FONCTIONNELLE SYSTEMATIQUE S F Z
代理机构：Fleit & Jacobson
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