Hermetic multistage vacuum pump

申请号 EP03019688.5 申请日 2003-09-09 公开(公告)号 EP1398506A3 公开(公告)日 2006-05-17
申请人 KABUSHIKI KAISHA TOYOTA JIDOSHOKKI; 发明人 Kuramoto, Satoru, K.K. Toyota Jidoshokki; Kawaguchi, Masahiro, K.K. Toyota Jidoshokki; Yamamoto, Shinya, K.K. Toyota Jidoshokki; Hoshino, Nobuaki, K.K. Toyota Jidoshokki; Kuwahara, Mamoru, K.K. Toyota Jidoshokki;
摘要 A fluid pump includes a housing, a drive source, a rotary unit and a pumping mechanism. The drive source is accommodated in the housing and includes a rotary member for rotation. The rotary unit includes the rotary member and a rotary shaft, which is operatively connected to the rotary member for rotation. The rotary unit forming an engaging portion for engaging with a maintenance tool which is prepared outside the housing. The pumping mechanism is placed in the housing and is operated in accordance with the rotation of the rotary shaft. An allowing means is formed in the housing for allowing the maintenance tool to engage with the engaging portion so as to face the engaging portion. The rotary shaft is rotated by rotating the maintenance tool in a state that the maintenance tool is engaged with the engaged portion.
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