Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-05-09
2006-05-09
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C384S110000, C360S099080
Reexamination Certificate
active
07042125
ABSTRACT:
A fluid bearing design is provided which according to one aspect includes a shaft defining together with a surrounding sleeve an asymmetric journal bearing, and a thrust bearing at or near an end of the shaft towards which the asymmetric journal bearing is pumping, with that end of the shaft being closed off. The journal bearing asymmetry establishes a hydraulic pressure toward the closed end of the shaft. This pressure provides an axial thrust to set the bearing gap for the conical bearing. The conical bearing itself is a relatively balanced bearing, although it may have a bias pumping toward the shaft and the journal bearing.A pressure closed equalization path from the journal bearing through the conical bearing to the end of the shaft may be established to maintain a constant hydraulic force across the conical bearing, and which may also prevent any asymmetry in the conical bearing from affecting the net thrust force acting upon the end of the shaft where the conical bearing is located. Alternatively, in a fluid dynamic bearing design comprising a shaft and a thrust plate at or near an end of the shaft, asymmetry is again established along the journal bearing to establish a pressure gradient directed toward the thrust bearing.
REFERENCES:
patent: 5427456 (1995-06-01), Hensel
patent: 5559651 (1996-09-01), Grantz et al.
patent: 5697708 (1997-12-01), Leuthold et al.
patent: 5947608 (1999-09-01), Kim
patent: 6019516 (2000-02-01), Leuthold et al.
patent: 6181039 (2001-01-01), Kennedy et al.
patent: 6211592 (2001-04-01), Ichiyama
patent: 6280088 (2001-08-01), Leuthold et al.
patent: 6322252 (2001-11-01), Grantz et al.
patent: 6371650 (2002-04-01), Goto et al.
patent: 2003/0198413 (2003-10-01), Hoffman et al.
patent: WO 98/48188 (1998-10-01), None
International Search Report mailed Sep. 11, 2003, for PCT patent application No. PCT/US03/13330, filed Apr. 29, 2003: 4 pages.
Aiello Anthony Joseph
Grantz Alan Lyndon
Herndon Troy Michael
Kennedy Michael David
LeBlanc Jeffry Arnold
Jones Judson H.
Morrison & Foerster / LLP
Schuberg Darren
Seagate Technology LLC
LandOfFree
Hydraulic fluid dynamic bearing incorporating an asymmetric... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic fluid dynamic bearing incorporating an asymmetric..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic fluid dynamic bearing incorporating an asymmetric... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3529580