EP0098008A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Memory storage apparatus having vibration-dampened base plate arrangement
Assignee: Atasi Corp
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Filing: 1983-06-18
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Granted: —
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Expires: 2003-06-18
Abstract
Abstract A fixed disc drive type of rotating disc memory storage device (10) includes an annular elastomeric pad (100) that is engaged between the actuator base plate (32) and a bowl-shaped casing (12). The base plate (32) has a circular platform portion with the boss (36) for the spindle shaft (80) for the discs (01-03) being formed at its center. The annular pad (100) forms an air-tight seal at the edge of a circular opening (12a) in the lower casing (12) to prevent dust from entering the housing. The annular pad (100) is engaged against the entire side marginal area of the base plate (32) so that it dampens resonant vibrations in the base plate (32) thus providing stable servo response within the range of said resonant vibration range.
Inventors
- 👤 Stanley Fred Brown
- 👤 Garold William Plonczak
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 01:09
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/08; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0323; G11B23/50; G11B23/505; G11B23/507; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
250 words
A rotating disc memory storage apparatus including at least one disc for the storage of information and at least one transducer for accessing data recorded on the disc, said apparatus being characterized by comprising: a housing, including a lower first portion and an upper second portion; an electric spindle motor including a stator and a rotor, a spindle shaft operatively connected to the motor, a base plate including a platform portion and an actuator portion, boss means secured to the platform portion for rotatably receiving said spindle shaft so that the spindle may be rotated about an axis that is perpendicular to said platform portion, means for mounting the base plate to the housing, an annular elastomeric member adapted to engage the side marginal area of the base plate platform and actuator portions, means for attaching the base plate to the lower first portion of said housing to firmly engage the elastomeric member between the base plate and the housing in firm contact with said side marginal areas of the base plate, means for operatively connecting the motor to the spindle shaft to rotate the spindle shaft when the motor is energized, said at least one disc being operatively mounted to the spindle shaft so that the disc rotates in a plane that is coaxial with and normal to the spindle, and actuator means mounted to the base plate actuator portion at a position remote from the spindle for translating said transducer along the disc to selected track locations thereon.
Claim 2
Dependent Claim
250 words
A rotating disc memory storage apparatus including at least one disc for the storage of information and at least one transducer for accessing data recorded on the disc, said apparatus being characterized by comprising: a housing, including a lower first portion and an upper second portion; an electric spindle motor including a stator and a rotor, a spindle shaft operatively connected to the motor, a base plate including a platform portion and an actuator portion, boss means secured to the platform portion for rotatably receiving said spindle shaft so that the spindle may be rotated about an axis that is perpendicular to said platform portion, means for mounting the base plate to the housing, an annular elastomeric member adapted to engage the side marginal area of the base plate platform and actuator portions, means for attaching the base plate to the lower first portion of said housing to firmly engage the elastomeric member between the base plate and the housing in firm contact with said side marginal areas of the base plate, means for operatively connecting the motor to the spindle shaft to rotate the spindle shaft when the motor is energized, said at least one disc being operatively mounted to the spindle shaft so that the disc rotates in a plane that is coaxial with and normal to the spindle, and actuator means mounted to the base plate actuator portion at a position remote from the spindle for translating said transducer along the disc to selected track locations thereon.
Claim 3
Dependent Claim
73 words
The rotating disc memory storage apparatus according to Claim 1 further characterized in that the base plate platform portion has a flat annular shape and the actuator portion is integrally formed with the platform portion to project laterally therefrom, the housing having a flat wall adjacent the base plate, the elastomeric member having an annular portion of a diameter adapted to the side marginal area of the platform portion of the base plate.
Claim 4
Dependent Claim
57 words
The rotating disc memory storage-apparatus according to Claim 2 further characterized in that the motor is mounted to the platform portion of the base plate at the opposite side thereof relative to the disc, said housing wall having an opening through which the motor extends, said elastomeric member having a shape and width to circumscribe said opening.
Claim 5
Dependent Claim
54 words
The rotating disc memory storage apparatus according to Claim 3, further characterized in that the actuator portion includes two spaced apart flat sections that project from the platform portion in the plane thereof, said elastomeric member including two spaced apart portions engaged against said flat sections of the actuator portion of the base plate.
Claim 6
Dependent Claim
218 words
An improved rotating disc memory storage apparatus including a housing, an actuator assembly mounted within the housing, the actuator assembly including a carriage, at least one transducer mounted to the carriage, electromagnetic means for reciprocating the carriage, a motor mounted within the housing, at least one disc operatively connected to the motor within the housing, the transducer being mounted to the carriage so that upon reciprocation of the carriage the transducer is moved to a desired track location on the surface of the disc, said apparatus being characterized by comprising: a base plate separate from the housing, the base plate including a platform portion; means mounted to the platform portion for receiving the actuator assembly, a spindle shaft for operatively connecting the disc to the motor; hub means mounted to said platform portion for rotatably receiving spindle shaft; at least one elastomeric pad compressed between the base plate and the housing for dampening'vibrations induced in the base plate by reciprocation of the carriage, said at least one pad extending in contact with the base plate from the vicinity of the actuator assembly to the part of the base plate that is remote from the actuator assembly; and means for attaching the base plate to the housing to engage the pad in firm intimate contact with the base plate.
Claim 7
Dependent Claim
218 words
An improved rotating disc memory storage apparatus including a housing, an actuator assembly mounted within the housing, the actuator assembly including a carriage, at least one transducer mounted to the carriage, electromagnetic means for reciprocating the carriage, a motor mounted within the housing, at least one disc operatively connected to the motor within the housing, the transducer being mounted to the carriage so that upon reciprocation of the carriage the transducer is moved to a desired track location on the surface of the disc, said apparatus being characterized by comprising: a base plate separate from the housing, the base plate including a platform portion; means mounted to the platform portion for receiving the actuator assembly, a spindle shaft for operatively connecting the disc to the motor; hub means mounted to said platform portion for rotatably receiving spindle shaft; at least one elastomeric pad compressed between the base plate and the housing for dampening'vibrations induced in the base plate by reciprocation of the carriage, said at least one pad extending in contact with the base plate from the vicinity of the actuator assembly to the part of the base plate that is remote from the actuator assembly; and means for attaching the base plate to the housing to engage the pad in firm intimate contact with the base plate.
Claim 8
Dependent Claim
61 words
The improved rotating disc memory storage apparatus of Claim 5, further characterized in that the base plate includes an annular platform portion having a flat annular side marginal portion adjacent the housing, the housing having a flat wall portion, and said at least one elastomeric pad having an annular form adapted to engage the flat marginal area of the base plate.
Claim 9
Dependent Claim
67 words
The improved rotating disc memory storage apparatus of Claim 6, further characterized in that the annular platform portion of the base plate is flat and the base plate further includes an actuator portion for mounting the actuator assembly, the actuator portion projecting from the platform portion in the plane thereof, the pad including portions engaged between the actuator portion and the flat wall portion of the housing.
Claim 10
Dependent Claim
101 words
The improved rotating disc memory storage apparatus according to Claim 7, further characterized in that said means for attaching the base plate to the housing includes several screws for attaching the base plate to the housing, resilient washers received on the screws between the base plate and the housing, the washers having frusto-conical shapes, the base plate platform portion having bores for receiving said screws that are conically counterbored to receive the washers, and means projecting above the flat wall of the housing for supporting said washers relative to the flat housing wall to enable the elastomeric pad to be compressed.
References Cited (Backward Citations)
US4144466A
Cited
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