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专利名称：Rotary fluid compressor having a spiral
blade with an enlarging section
发明人：Takayoshi Fujiwara,Hisanori Honma,Yoshinori
Sone
申请号：US07/469373申请日：19900124公开号：US04997352A公开日：19910305
摘要：A fluid compressor includes a rotating body arranged in a cylinder to extend inthe axial direction of the cylinder and eccentric thereto. A spiral groove is formed on theouter circumference of the rotating body, and a spiral blade is slidably fitted in thegroove. The pitches of the groove is narrowed at a predetermined rate with a distancefrom a suction- side end of the cylinder to a discharge-side end of the cylider. The groovehas an enlarging section which has a start point, a changeover point, and a terminal point.The enlarging section includes a first portion extending from the start point to thechangeover point and having a pitch which changes at a rate smaller than the
predetermined rate, and a second portion extending from the changeover point to theterminal point and having a pitch which changes at a rate larger than the predeterminedrate. The space between the rotating body and the cylinder is divided by the blade into aplurality of operation chambers.
申请人：KABUSHIKI KAISHA TOSHIBA
代理机构：Cushman, Darby & Cushman
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