Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-01-03
2006-01-03
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S051000, C310S06700R, C310S090500, C360S099080, C384S100000, C384S121000
Reexamination Certificate
active
06982510
ABSTRACT:
The design comprises a shaft and sleeve supported for relative rotation by a journal type fluid dynamic bearing utilizing grooves on one of the shaft or sleeve surfaces. A grooved pattern of a design similar to that usually found on a thrust plate is defined on an axial end surface of the shaft or the counterplate facing the axial end of the shaft, so that thrust is created to maintain separation of the end of the shaft and the facing thrust plate during relative rotation.In one embodiment, to establish and maintain the gap between the shaft end and the facing counterplate, the journal bearing has an asymmetry to pump toward the shaft end having the bearing. In a further refinement, to maintain the shaft and gap within an optimum spacing, a magnet is mounted to provide an axially directed magnetic force on the shaft which works against the axial force created by shaft end thrust bearing.To prevent separation of the shaft and sleeve or hub, the hub which is integrated with a rotating shaft, further incorporates a shoulder which extends axially beneath a cooperating shoulder on the sleeve surrounding the shaft to prevent any more than a limited axially displacement of the hub and shaft relative to the sleeve.
REFERENCES:
patent: 4200344 (1980-04-01), Binns et al.
patent: 4557610 (1985-12-01), Asada et al.
patent: 5018881 (1991-05-01), Asada
patent: 5089732 (1992-02-01), Konno et al.
patent: 5112141 (1992-05-01), Asada et al.
patent: 5142173 (1992-08-01), Konno et al.
patent: 5426548 (1995-06-01), Fujii et al.
patent: 5559382 (1996-09-01), Oku et al.
patent: 5647672 (1997-07-01), Fukutani
patent: 5683183 (1997-11-01), Tanaka et al.
patent: 5710678 (1998-01-01), Leuthold et al.
patent: 5715116 (1998-02-01), Moritan et al.
patent: 5718516 (1998-02-01), Cheever et al.
patent: 5723927 (1998-03-01), Teshima
patent: 5744882 (1998-04-01), Teshima et al.
patent: 5914832 (1999-06-01), Teshima
patent: 5969448 (1999-10-01), Liu et al.
patent: 5977674 (1999-11-01), Leuthold et al.
patent: 5998898 (1999-12-01), Fukutani et al.
patent: 6034454 (2000-03-01), Ichiyama
patent: 6172847 (2001-01-01), Sakatani et al.
patent: 6188152 (2001-02-01), Wakitani et al.
patent: 6205110 (2001-03-01), Miyamoto et al.
patent: 6211592 (2001-04-01), Ichiyama
patent: 6252322 (2001-06-01), Kawawada et al.
patent: 6271612 (2001-08-01), Tanaka et al.
patent: 6307293 (2001-10-01), Ichiyama
patent: 6339270 (2002-01-01), Ichiyama
patent: 6364532 (2002-04-01), Yoshikawa et al.
patent: 2002/0185925 (2002-12-01), Yoshikawa et al.
patent: 10030763 (2000-06-01), None
patent: 2001124085 (2001-05-01), None
PCT Int'l Search Report Dec. 12, 2002 PCT.
Ajello Anthony Joseph
Flores Gregor Paco
Kloeppel Klaus Dieter
Morrison & Foerster / LLP
Scheuermann David W.
Schuberg Darren
Seagate Technology LLC
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