Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Reexamination Certificate
2007-08-28
2007-08-28
Chen, Tianjie (Department: 2627)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
C310S090000
Reexamination Certificate
active
10696755
ABSTRACT:
In one aspect of the invention, a motor having improved stiffness is provided. In one embodiment, the motor includes a stationary shaft, a hub, a thrust plate and a counter plate. The thrust plate is coupled to the shaft. The hub is rotatable about a central axis of the shaft. The counter plate is coupled to the hub and has the shaft extending therethrough. The counter plate and the thrust plate define at least a portion of a fluid dynamic bearing, wherein at least a portion of counter plate and the thrust plate form a capillary seal therebetween. The capillary seal enhances motor performance by providing a fluid reservoir for the fluid dynamic bearing, allowing fluid to be added to the hydrodynamic bearing without motor disassembly and providing a passage for air to escape from between the bearing surfaces. In one embodiment, the motor is particularly suitable for disc drive applications.
REFERENCES:
patent: 5634724 (1997-06-01), Zang et al.
patent: 5847479 (1998-12-01), Wang et al.
patent: 6066903 (2000-05-01), Ichiyama
patent: 6069768 (2000-05-01), Heine et al.
patent: 6071014 (2000-06-01), Lee et al.
patent: 6181039 (2001-01-01), Kennedy et al.
patent: 6236535 (2001-05-01), Gilliland
patent: 6249400 (2001-06-01), Hong et al.
patent: 6292328 (2001-09-01), Rahman et al.
patent: 6339515 (2002-01-01), Lee et al.
patent: 6394654 (2002-05-01), Khan et al.
patent: 6404087 (2002-06-01), Ichiyama
patent: 6900567 (2005-05-01), Aiello et al.
patent: 7042125 (2006-05-01), LeBlanc et al.
patent: 2003/0214193 (2003-11-01), Aiello et al.
patent: 2000014079 (2000-01-01), None
Grantz, et al., “Motor Having A Fluid Dynamic Bearing With An Asymmetric Seal” U.S. Appl. No. 10/641,642 filed Aug. 14, 2003.
Chen Tianjie
Morrison & Foerster / LLP
Seagate Technology LLC
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