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US 5,708,539 AGranted
Disk storage drive
AssigneePapst Licensing GmbH & Co. KG
InventorBernhard Schuh
Life of this patent
Estimating the term…
Abstract
A disk storage has one or more disks provided with center holes. An electric motor extends coaxially through these holes and has an external rotor to the outer circumference of which the disks are secured so that they rotate with the rotor. A seal is provided for at least reducing the escape of contaminants from the motor.
Claims26
A disk storage device comprising:
- a contaminant-free environment chamber;
- at least one storage disk having a center hole and mounted in said contaminant-free environment for cooperation with data access heads included in said storage device;
- a brushless DC motor extending coaxially through said center hole and having a stator and a rotor surrounding the stator, the rotor and the stator mounted inside the chamber;
- means connecting said storage disk to said rotor for rotation with said rotor;
- and
- a narrow gap located near the periphery of the rotor and formed by a portion of the rotor and a stationary part of said device for retarding the escape of contaminants from said brushless DC motor into said contaminant-free environment chamber.
3 more elements
A disk storage device, comprising:
- a plurality of walls forming a chamber enclosing a substantially contaminant-free environment for cooperation with data access heads included in said storage device;
- at least one storage disk having a center hole and mounted in said contaminant-free environment;
- a brushless DC motor having a stator and a rotor with a substantially cylindrical air gap therebetween, the rotor and the stator mounted within said contaminant-free environment, said rotor having a storage disk mounting part extending coaxially through said center hole;
- means connecting said storage disk to said storage disk mounting part of said rotor;
- and
- a narrow gap formed by a portion of the rotor and a stationary part of said device for reducing the escape of contaminants from said brushless DC motor into said contaminant-free environment.
3 more elements
A disk storage device, comprising:
- a plurality of walls forming a chamber enclosing a substantially contaminant-free environment for cooperation with data access heads included in said storage device;
- at least one storage disk having a center hole and mounted in said contaminant-free environment;
- a brushless DC motor having a stator and a rotor with a substantially cylindrical air gap therebetween, the rotor and stator mounted within said contaminant-free environment, said rotor having a storage disk mounting part extending coaxially through said center hole;
- means connecting said storage disk to said storage disk mounting part of said rotor;
- and
- a narrow gap formed between a portion of the rotor and a stationary part of the device which is effective for retarding escape of said contaminants from said brushless DC motor to said contaminant-free environment.
3 more elements
Dependencies are inferred from the claim text.