ROOTS TYPE VACUUM PUMP

Roots type vacuum pump having a first Roots rotor and a second Roots rotor with an involute side surface (31) having a shape of an involute curve, an arcuate convex surface (34) coupled to an outer end of the involute side surface (31), and an arcuate concave surface (36) coupled to an inner end of...

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Bibliographische Detailangaben
Hauptverfasser: HORIBE, Yuga, KAMATKAR, Anagha, SUGIURA, Tetsuro, NAGAYAMA, Masami
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:Roots type vacuum pump having a first Roots rotor and a second Roots rotor with an involute side surface (31) having a shape of an involute curve, an arcuate convex surface (34) coupled to an outer end of the involute side surface (31), and an arcuate concave surface (36) coupled to an inner end of the involute side surface (31). A radius of curvature of the arcuate convex surface (34) is larger than a radius of curvature of the arcuate concave surface (36).