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three lobe root blower design

Question asked by Anurag Yadav on Oct 15, 2015
Latest reply on Feb 9, 2018 by Nesrine Hmida

please help me to draw (r) and (r') in the given picture below.. m not able to draw it. please consider this link for more information http://www.google.com/patents/EP0308827A2?cl=en . I dont know how to draw a hypocycloid and epicycloid from base circle (R). please tell me how to draw it.

iimgf0001.png

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