Resin screw rotor molded to a metallic shaft
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United States of America Patent
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Nov 13, 2012
Grant Date -
Apr 3, 2008
app pub date -
Sep 28, 2007
filing date -
Sep 28, 2006
priority date (Note) -
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Abstract
The present invention is to provide a screw rotor including a resin rotor formed around a metallic shaft without generation of cracks. Spiral chamfers are formed on surfaces of metallic shafts around which resin rotors are formed. Preferably the surfaces of the shafts may be sandblasted, and after the surfaces of the shafts are preliminarily coated with resin and then the rotors may be molded.
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