Disc drive having hydrodynamic labyrinth seal and magnet shield

Details Disc drive having hydrodynamic labyrinth seal and magnet shield Disc drive having hydrodynamic labyrinth seal and magnet shield

1998-07-06

2000-04-25

Cao, Allen T.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 1702

Patent

active

060551267

ABSTRACT:
A disc drive system includes a disc drive chassis, a magnetic storage disc, a read/write transducer adjacent to the disc for reading and writing information on the disc, and a hydrodynamic bearing assembly. The hydrodynamic bearing assembly rotatably couples the magnetic storage disc to the disc drive chassis. The hydrodynamic bearing assembly includes a fluid path therethrough for circulating a fluid. A labyrinth seal and magnet shield is provided proximate the hydrodynamic bearing assembly.

REFERENCES:
patent: 3283905 (1966-11-01), Cass
patent: 3800914 (1974-04-01), Miyata
patent: 4365656 (1982-12-01), Takahashi
patent: 4440402 (1984-04-01), Pinkus et al.
patent: 4468578 (1984-08-01), Takahashi
patent: 4618806 (1986-10-01), Grouse
patent: 4630943 (1986-12-01), Stahl et al.
patent: 4673997 (1987-06-01), Gowda et al.
patent: 4759842 (1988-07-01), Frees et al.
patent: 4767954 (1988-08-01), Phillips
patent: 4779165 (1988-10-01), Elsaesser et al.
patent: 4784767 (1988-11-01), Hasuda et al.
patent: 4805054 (1989-02-01), Kamoto et al.
patent: 4851116 (1989-07-01), Tomita
patent: 4883981 (1989-11-01), Gerfast
patent: 4934836 (1990-06-01), Tanaka et al.
patent: 4938611 (1990-07-01), Nii et al.
patent: 4965476 (1990-10-01), Lin
patent: 4985792 (1991-01-01), Moir
patent: 5011165 (1991-04-01), Cap
patent: 5013947 (1991-05-01), Ide
patent: 5031061 (1991-07-01), Hatch
patent: 5070289 (1991-12-01), Pona, Jr.
patent: 5140479 (1992-08-01), Elsing et al.
patent: 5141338 (1992-08-01), Asada et al.
patent: 5142173 (1992-08-01), Konno et al.
patent: 5142174 (1992-08-01), Ide
patent: 5215385 (1993-06-01), Ide
patent: 5223758 (1993-06-01), Kataoka et al.
patent: 5224782 (1993-07-01), Miwa et al.
patent: 5246294 (1993-09-01), Pan
patent: 5267737 (1993-12-01), Cossete et al.
patent: 5284391 (1994-02-01), Diel et al.
patent: 5295028 (1994-03-01), Elsing
patent: 5323076 (1994-06-01), Hajec
patent: 5328271 (1994-07-01), Titcomb
patent: 5331244 (1994-07-01), Rabe
patent: 5345130 (1994-09-01), Kliman et al.
patent: 5358339 (1994-10-01), Konno et al.
patent: 5366298 (1994-11-01), Toshimitsu et al.
patent: 5367416 (1994-11-01), Cossette et al.
patent: 5376850 (1994-12-01), Elsing et al.
patent: 5376851 (1994-12-01), Lipo et al.
patent: 5376852 (1994-12-01), Kawamura et al.
patent: 5389252 (1995-02-01), Morrick
patent: 5423612 (1995-06-01), Zang et al.
patent: 5427456 (1995-06-01), Hensel
patent: 5440185 (1995-08-01), Allwine, Jr.
patent: 5441647 (1995-08-01), Wascher et al.
patent: 5457588 (1995-10-01), Hattori et al.
patent: 5458785 (1995-10-01), Howe et al.
patent: 5465078 (1995-11-01), Jones, Jr.
patent: 5473484 (1995-12-01), Dunfield et al.
patent: 5504637 (1996-04-01), Asada et al.
patent: 5510664 (1996-04-01), Suzuki et al.
patent: 5524986 (1996-06-01), Leuthold et al.
patent: 5600511 (1997-02-01), Dunfielg et al.
patent: 5600514 (1997-02-01), Fukuzawa
patent: 5712746 (1998-01-01), Moir et al.
patent: 5724718 (1998-03-01), Moir et al.
patent: 5732458 (1998-03-01), Moir et al.
patent: 5774302 (1998-06-01), Elsaesser et al.
patent: 5877916 (1999-03-01), Papst
patent: 5880545 (1999-03-01), Takemura et al.
patent: 5909339 (1999-06-01), Hong
S. Prina and C. Taft, "The Design and Analysis of Brushless DC Motors Having Smooth Rotor Back Iron", pp. 75-100 (undated).
DC Motors Speed Controls Servo Systems, "Brushless DC Motors", Electro-Craft Corporation, Hopkins, MN, Chapter 6, pp. 6-5 --6-17 (1972).
C. Veinott, Theory and Design of Small Induction Motors, "Air-Gap MMF and Flux Waves Set Up by a Single-Phase Winding", published by McGraw-Hill Company, Inc., New York, Chapter 14, pp. 265-281 (1959).
C. Veinott, Theory and Design of Small Induction Motors, "Air-Gap MMF Waves Set up by Polyphase Stator Windings", published by McGraw-Hill Company, Inc., New York, Chapter 15, pp. 282-290 (1959).
A.E. Fitzgerald, C. Kingsley, Jr. and S. Umans, Fourth Edition --Electric Machinery, "Rotating Machines: Basic Concepts", published by McGraw-Hill Company, Inc., New York, pp. 133-135 (1983).
T.H. Barton, J.C. Dunfield, IEEE Transactions on Power Apparatus and Systems, "Inductances of a Practical Slip-Ring Primitive", IEEE, vol. PAS-85/No. 2, pp. 140-159 (1966).
J.C. Dunfield, T.H. Barton, Proceedings of The Institution of Electrical Engineers, "Effect of m.m.f. and permeance harmonics in electrical machines --with special reference to a synchronous machine", The Inst. of Elect. Eng., Savoy Place, London WC2, vol. 114, No. 10, pp. 1443-1450 (1967).
Data Sheet, "Solving Design Problems with Synthetic Lubricants," published by Nye Lubricants, Inc., P.O. Box 8928, New Bedford, MA 02742 (undated), pp. 1-3.

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