High capacity disk drive with two stator windings
First Claim
1. A hard disk apparatus comprising in combination:
- a base plate;
a top plate spaced from and generally parallel to said base plate by a peripheral housing around at least a portion of said base plate;
at least one planar magnetic recording disks contained with said housing, each said disk having a magnetically recordable material on upper and lower surfaces thereof and rotatably supported from said base plate and said top plate with said housing by a dual stator spindle motor for rotation of said disk about a first axis normal to the plane of said disk; and
at least one transducer head positioning actuator arm assembly supported with said housing for rotation of at least one elongated actuator arms about a second axis parallel to and spaced from said first axis;
said motor having a stationary spindle on said first axis fastened to said base plate and to said top plate, a first stator assembly concentric to said spindle fastened to said base plate, a second stator assembly fastened to said top plate, and a motor hub rotatably mounted on said spindle for supporting said disks.
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Accused Products
Abstract
A hard disk drive apparatus is disclosed which utilizes at least a pair of actuator assemblies each of which includes a plurality of separate actuator arms and spacers stacked on a tubular sleeve which is bearing supported on a stationary actuator shaft. The arms and spacers are preferably ceramic with head leads and preamplifiers carried on the arm. Each actuator stack has heads oriented in only one direction to minimize the spacing between the hard disks.
The head disk assembly is built up on the baseplate by installation of layers of actuator arms, spacers and hard disks. The assembled head disk assembly is enclosed between the generally flat baseplate and a top plate by a peripheral housing therearound.
The disks are rotated by a dual stator motor located between the baseplate and the top plate with one stator mounted to the baseplate and the other stator mounted to the top plate.
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Citations
12 Claims
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1. A hard disk apparatus comprising in combination:
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a base plate; a top plate spaced from and generally parallel to said base plate by a peripheral housing around at least a portion of said base plate; at least one planar magnetic recording disks contained with said housing, each said disk having a magnetically recordable material on upper and lower surfaces thereof and rotatably supported from said base plate and said top plate with said housing by a dual stator spindle motor for rotation of said disk about a first axis normal to the plane of said disk; and at least one transducer head positioning actuator arm assembly supported with said housing for rotation of at least one elongated actuator arms about a second axis parallel to and spaced from said first axis; said motor having a stationary spindle on said first axis fastened to said base plate and to said top plate, a first stator assembly concentric to said spindle fastened to said base plate, a second stator assembly fastened to said top plate, and a motor hub rotatably mounted on said spindle for supporting said disks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification