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Patent Searching and Data


Title:
SHAFT SEALING STRUCTURE FOR VACUUM PUMP
Document Type and Number:
Japanese Patent JP2008051116
Kind Code:
A
Abstract:

To improve the sealing function of a labyrinth seal for preventing oil leakage to the pump chamber of a vacuum pump.

Annular shaft sealing rings 49, 50 are fitted and fixed to rotating shafts 19, 20 in fitting holes 47, 48 formed in a rear housing 14. The labyrinth seals 57, 58 are provided between each of end faces 492, 502 of the shaft sealing rings 49, 50 and each of bottom forming faces 472, 482 of the fitting holes 47, 48.


Inventors:
YAMAMOTO SHINYA
KAWAGUCHI MASAHIRO
EGASHIRA SATOSHI
Application Number:
JP2007287331A
Publication Date:
March 06, 2008
Filing Date:
November 05, 2007
Export Citation:
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Assignee:
TOYOTA IND CORP
International Classes:
F04C27/00; F04C18/18; F04C25/02
Domestic Patent References:
JPH0587148A1993-04-06
JPH02157490A1990-06-18
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda