Title:
改良真空ポンプ
Document Type and Number:
Japanese Patent JP3993666
Kind Code:
B2
Abstract:
A vacuum pump of the regenerative type comprising a rotor and a stator body in which the rotor is adapted for rotation and in which the rotor has a series of blades positioned in an annular array on a side of the rotor the stator has an annular channel within which the blades can rotate having a cross-sectional area greater than that of the individual blades except for a small part of the channel which has a reduced cross-section providing a close clearance for the blades, wherein the rotor has at least two series of blades positioned in concentric annular arrays on a side of the rotor and the stator has a corresponding number of channels within which the blades of the arrays can rotate and means are provided to link the channels to form a continuous passageway through which gas being evacuated by the pump can pass.
Inventors:
Niger Paul Scofield
Application Number:
JP15147897A
Publication Date:
October 17, 2007
Filing Date:
May 06, 1997
Export Citation:
Assignee:
The BOC Group plc
International Classes:
F04D19/04; F04B37/14; F04D17/16; F04D23/00
Domestic Patent References:
| JP2264196A | ||||
| JP1267390A | ||||
| JP3043696A | ||||
| JP3182697A | ||||
| JP7111195B2 | ||||
| JP63147990A |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo