Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural distributing means immediately upstream of runner
Reexamination Certificate
2005-08-26
2010-11-02
Nguyen, Ninh H (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Plural distributing means immediately upstream of runner
C415S199500, C415S211200
Reexamination Certificate
active
07824153
ABSTRACT:
A stator vane for a turbo molecular pump has stator vane halves each having inner and outer rim portions and radially arranged stator blades connected integrally between the inner and outer rim portions. The inner rim portion of each stator vane half has a pair of inner rim ends and the outer rim portion of each stator vane half has a pair of outer rim ends. The stator vane halves are disposed in abutment with one another along an abutment line to form an annular body with the inner rim ends of one of the stator vane halves being disposed in confronting relation with the respective inner rim ends of the other of the stator vane halves and with the outer rim ends of the one of the stator vane halves being disposed in confronting relation with the respective outer rim ends of the other of the stator vane halves. At least each of the inner rim ends or each of the outer rim ends of one of the two stator blade halves being formed shorter in a circumferential direction of the annular body with respect to the abutment line to form a gap between the confronting inner rim ends or the confronting outer rim ends.
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patent: 2003/0223859 (2003-12-01), Carboneri et al.
patent: 2004/0033130 (2004-02-01), Blumenthal et al.
patent: 19937393 (2001-02-01), None
Akimoto Takeshi
Kawanishi Shinji
Adams & Wilks
BOC Edwards Japan Limited
Nguyen Ninh H
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