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Patent Searching and Data


Title:
SPINDLE MOTOR FOR HARD DISK DRIVE
Document Type and Number:
WIPO Patent Application WO2001010002
Kind Code:
A3
Abstract:
The present invention is directed to a high speed spindle motor comprising a stator assembly including a stator having multiple conductors that create a plurality of magnetic fields when electrical current is conducted by the conductors and a body of a phase change material such as a thermoplastic substantially encapsulating the stator. A rotatable hub having a magnet connected thereto is in operable proximity to the stator. The high speed motor also includes a shaft, a bearing surrounding the shaft and one of the bearing or shaft being fixed to the stator assembly and the other of the bearing or shaft being fixed to the rotatable hub. Hard disc drives using the motor, and methods of developing and constructing the motor and hard disc drives are also disclosed.

Inventors:
NEAL GRIFFITH D (US)
Application Number:
PCT/US2000/019870
Publication Date:
November 22, 2001
Filing Date:
July 19, 2000
Export Citation:
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Assignee:
ENCAP MOTOR CORP (US)
NEAL GRIFFITH D (US)
International Classes:
G11B19/20; H02K1/04; H02K1/14; H02K1/18; H02K3/38; H02K3/46; H02K5/02; H02K5/08; H02K5/10; H02K5/16; H02K5/167; H02K5/173; H02K5/24; H02K7/08; H02K11/00; H02K15/02; H02K15/10; H02K15/12; H02K15/14; H02K21/12; H02K21/16; H02K21/22; H02K21/24; H02K29/00; H02K5/22; H02K7/14; H02K15/16; (IPC1-7): H02K1/18; H02K21/22
Foreign References:
US5694268A1997-12-02
DE4221429A11993-01-07
US4855853A1989-08-08
Other References:
PATENT ABSTRACTS OF JAPAN vol. 018, no. 167 (E - 1528) 22 March 1994 (1994-03-22)
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 08 30 June 1998 (1998-06-30)
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08 30 June 1999 (1999-06-30)
PATENT ABSTRACTS OF JAPAN vol. 014, no. 079 (E - 0888) 14 February 1990 (1990-02-14)
PATENT ABSTRACTS OF JAPAN vol. 013, no. 483 (E - 839) 2 November 1989 (1989-11-02)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29)
PATENT ABSTRACTS OF JAPAN vol. 015, no. 340 (E - 1105) 28 August 1991 (1991-08-28)
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