Disk drive constructed to isolate motor vibration

Claim 2

A disk drive for writing and reading data to and from a magnetic disk contained in a rigid cartridge comprising: a chassis; a spicule member mounted on said chassis, said spicule member engaging and guiding said cartridge with respect to said disk drive; a drive spindle for driving said magnetic disk; said spicule member having a drive shaft housing in which said spindle is rotatably mounted; a stator having a plurality of stator windings and a central aperture disposed about said spindle; a rotor coupled to said spindle and inductively disposed about said stator; and a shock-absorbing stator positioner disposed around a substantial portion of a shoulder of said drive shaft housing, said stator being placed over said positioner, said positioner securing said stator against movement, said positioner being a stiff microcellular urethane material.

Claim 3

The disk drive recited in claim 1 wherein said stator positioner is a flat circular band positioned around said spindle.

Claim 4

The disk drive recited in claim 1 further comprising: a printed circuit board mounted on said chassis, said printed circuit board being disposed between said chassis and said stator, said printed circuit board having a printed circuit thereon and an aperture through which said drive shaft housing passes; and an open celled urethane gasket between said printed circuit board and said stator, said open celled urethane gasket absorbing the vibrational forces in the disk drive.

Claim 5

The disk drive recited in claim 3 wherein said gasket is coated with a layer of adhesive on both sides, said adhesive layers bonding said printed circuit board to said stator.

Claim 6

The disk drive recited in claim 1 further comprising: read/write heads; and a Bernoulli surface on said magnetic disk, said spicule member positioning said Bernoulli surface with respect to said read/write heads and said stator positioner positioning said stator with respect to said spicule member.

Claim 7

A magnetic disk drive for writing and reading data to and from a magnetic disk contained in a rigid cartridge, comprising: a chassis; a spicule member mounted on said chassis, said spicule member engaging and guiding said cartridge with respect to said disk drive; a drive spindle rotatably supported by said chassis for driving the magnetic disk, said spicule member having a drive shaft housing in which said drive spindle is rotatably mounted; a drive shaft rotatably engaging said drive spindle; a stator having a plurality of stator windings and a central aperture disposed about said drive shaft; a printed circuit board mounted on said chassis, said printed circuit board being disposed between said chassis and said stator, said printed circuit board having a printed circuit thereon and an aperture through which said drive shaft passes; a stator spacer disposed between said stator and said printed circuit for aligning said stator with respect to said drive spindle, a shock-absorbing stator positioner disposed around a substantial portion of a shoulder of said drive shaft housing, said stator being placed over said positioner, said positioner securing said stator against movement, said position being a stiff microcellular urethane material; a bell rotor mounted to the drive shaft and inductively disposed about said stator; and an open celled urethane gasket between said printed circuit board and said stator spacer, said open celled urethane absorbing vibrational forces produced by said rotor.

Claim 8

A magnetic disk drive for writing and reading data to and from a magnetic disk contained in a rigid cartridge, comprising: a chassis; a spicule member mounted on said chassis, said spicule member engaging and guiding said cartridge with respect to said disk drive; a drive spindle rotatably supported by said chassis for driving the magnetic disk, said spicule member having a drive shaft housing in which said drive spindle is rotatably mounted; a drive shaft rotatably engaging said drive spindle; a stator having a plurality of stator windings and a central aperture disposed about said drive shaft; a printed circuit board mounted on said chassis, said printed circuit board being disposed between said chassis and said stator, said printed circuit board having a printed circuit thereon and an aperture through which said drive shaft passes; a stator spacer disposed between said stator and said printed circuit for aligning said stator with respect to said drive spindle, a shock-absorbing stator positioner disposed around a substantial portion of a shoulder of said drive shaft housing, said stator being placed over said positioner, said positioner securing said stator against movement, said position being a stiff microcellular urethane material; a bell rotor mounted to the drive shaft and inductively disposed about said stator; and an open celled urethane gasket between said printed circuit board and said stator spacer, said open celled urethane absorbing vibrational forces produced by said rotor.

Claim 9

The disk drive recited in claim 6 wherein said gasket is coated with a layer of adhesive on both sides, said adhesive layers bonding said printed circuit board to said stator.

Claim 10

The disk drive recited in claim 7 wherein said adhesive is non-setting.

Claim 11

The disk drive recited in claim 6 wherein said gasket is made of a double-coated acrylic foam tape.