Baker & Hostetler LLP
Roots type fluid machine
A roots type fluid machine includes suction and discharge ports, rotary shafts and a pair of rotors. The rotor has a number n of lobe and valley portions with apex and bottom ends. The lobe portions are located on imaginary lines extending radially from an axis of the rotary shaft. The outer surface of each one of the rotors is generated by rotating an outline of the rotor including an arc and involute and envelope curves around and moving the outline in the direction of the axis. The arc has a radius R and a center located on the imaginary line. The involute curve is formed by an imaginary base circle having a radius r and a center located on the axis. The envelope curve is formed by an arc having a radius R. The number n is four or more. A torsional angle β is over 360/n degrees.
Kabushiki Kaisha Toyota Jidoshokki
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additional inventional inventional
Takayuki Kazuho Toshiro Fumihiro Tsutomu Masato Katsutoshi
Hirano Yamada Fujii Suzuki Nasuda Sowa Shiromaru