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Patent Searching and Data


Title:
VORTEX TYPE VACUUM PUMP
Document Type and Number:
Japanese Patent JP2004092478
Kind Code:
A
Abstract:

To provide a vortex type vacuum pump that can increase the number of rotor rotations of the pump and can improve the pump performance.

A slot 12 for generating a vortex is formed on a stator 2 and a projection 31 for forming a seal section, a gas introduction groove 32 for taking in gas and a gas ejection groove 33 for ejecting gas are provided on a rotor 25 so that the rotor shape is simplified and bears a high-speed rotation.


Inventors:
Nonaka, Manabu
Kabasawa, Tsuyoshi
Application Number:
JP2002000253366
Publication Date:
March 25, 2004
Filing Date:
August 30, 2002
Export Citation:
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Assignee:
BOC EDWARDS TECHNOLOGIES LTD
International Classes:
F04D5/00; F04D23/00; F04D29/42; (IPC1-7): F04D29/42; F04D5/00; F04D23/00
Attorney, Agent or Firm:
和田 成則