Title:
真空ポンプにおける油洩れ防止構造
Document Type and Number:
Japanese Patent JP4617615
Kind Code:
B2
Abstract:
A vacuum pump draws gas by operating a gas conveying body (23-32) in a pump chamber (39-43) through rotation of a rotary shaft (19, 20). The vacuum pump has an oil housing member (14, 33). The oil housing member (14, 33) defines an oil zone (331) adjacent to the pump chamber (39-43). The rotary shaft (19, 20) has a projecting portion that projects from the pump chamber (39-43) into the oil zone (331) through the oil housing member (14, 33). Stoppers (67, 68, 72) are located on the rotary shaft (19, 20) to integrally rotate with the rotary shaft (19, 20) and prevent oil from entering the pump chamber (39-43). The stoppers (67, 68, 72) are located along the axial direction of the rotary shaft (19, 20).
Inventors:
Shinya Yamamoto
Masahiro Kawaguchi
Uchiyama Osamu
Masahiro Kawaguchi
Uchiyama Osamu
Application Number:
JP2001204582A
Publication Date:
January 26, 2011
Filing Date:
July 05, 2001
Export Citation:
Assignee:
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
International Classes:
F04C18/18; F04C27/00; F04C18/12; F04C23/00; F04C25/02; F04C27/02; F04C29/02; F04B37/16
Domestic Patent References:
| JP62186073A | ||||
| JP56044253U | ||||
| JP2002500731A | ||||
| JP47020529B1 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda