专利名称：Sleeve valve发明人：Keiji Maezawa申请号：US05/715347申请日：19760817公开号：US04080982A公开日：19780328
摘要：A sleeve valve for pipelines has a fixed sleeve with inlet end open and outletend closed, and openings in its side wall. A movable sleeve open at both ends is slidablein the fixed sleeve to open and close the openings. The improvement is that the innersleeve also has openings in its side wall, and one or more ring-shaped partition plates aredisposed at substantially equal intervals between the outer wall of the movable sleeve,and the inner wall of the fixed sleeve.
申请人：MAEZAWA INDUSTRIAL INCORPORATED
代理人：William Anthony Drucker
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