Title:
OIL LEAK PREVENTIVE STRUCTURE OF VACUUM PUMP
Document Type and Number:
Japanese Patent JP2003013876
Kind Code:
A
Abstract:
To enhance the oil intrusion preventive effect by an oil intrusion preventing member used to prevent the oil from leaking into the pump chamber of a vacuum pump.
A shaft sealing ring 49 is fitted fast on a rotary shaft 19 in a fitting hole 47 formed in a rear housing 14, and an oil intrusion preventing ring 66 is fastened to the shaft sealing ring 49. Oil recovery chambers 70 and 71 are formed around the oil intrusion preventing ring 66. The oil recovery peripheral wall surfaces 702 and 712 is a tapered form as the wall surfaces of the oil recovery chambers 70 and 71 are arranged approaching the axis 191 of the rotary shaft 19 as going apart from the pump chamber 43 toward a gear storage chamber 331.
Inventors:
YAMAMOTO SHINYA
HOSHINO NOBUAKI
KAWAGUCHI MASAHIRO
ISHIGURE HIROYUKI
HOSHINO NOBUAKI
KAWAGUCHI MASAHIRO
ISHIGURE HIROYUKI
Application Number:
JP2001198020A
Publication Date:
January 15, 2003
Filing Date:
June 29, 2001
Export Citation:
Assignee:
TOYOTA IND CORP
International Classes:
F04B39/04; F04C18/12; F04C18/18; F04C23/00; F04C25/02; F04C27/00; (IPC1-7): F04C27/00; F04B39/04; F04C18/18; F04C23/00; F04C25/02
Domestic Patent References:
| JPS62186073A | 1987-08-14 | |||
| JPS56117164U | 1981-09-08 |
Attorney, Agent or Firm:
Hironobu Onda (1 person outside)