Patent US5379458A successfully refreshed from Google Patents.
US4835641A
Expired / Lapsed
US
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Magnetic disk apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1987-05-18
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Granted: 1989-05-30
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Expires: 2007-05-18
Abstract
Abstract A magnetic disk apparatus including a disc drive assembly for driving a magnetic disc and a head supporting assembly for supporting a plurality of magnetic heads at predetermined relationships with respect to the magnetic disc for facilitating magnetic recording and reproducing thereon. The head supporting assembly comprises an actuator arm, a plurality of suspension arms, each having the magnetic head at one end thereof and connected to the actuator arm at the other end thereof, and a plurality of screws disposed through holes formed in the actuator arm and suspension arms for detachably connecting the suspension arms to the actuator arm. The screws are disposed in a staggered relationship with respect to each other in terms of the direction of access thereto and accessible for fastening and unfastening from two opposite sides in the direction substantially perpendicular to the disc surface. Each suspension arm can be attached to and detached from the actuator arm without the need of disassembly of the rest of the head supporting assembly.
Inventors
- 👤 Nobuaki Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:27
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4813; G11B5/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
228 words
A magnetic disc apparatus including a disc drive assembly which drives a magnetic disc with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the magnetic disc for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a plurality of suspension arms, each having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof, one of the suspension arms carrying a magnetic head on the upper face of the magnetic disc and another of the suspension arms carrying a magnetic head on the lower face of them magnetic disc; respective fastening means disposed on said actuator arm for detachably connecting the second ends of said one and said other suspension arms to said actuator arm, said fastening means being accessible for fastening and unfastening in a single vectorial direction substantially perpendicular to the plane of the disc, and said fastening means being disposed in a staggered relationship with respect to each other in terms of the direction of access to said fastening means whereby both said one and said other suspension arms may be attached or detached from the actuator arm using the same direction of access without first disassembling the apparatus.
Claim 2
Dependent Claim
228 words
A magnetic disc apparatus including a disc drive assembly which drives a magnetic disc with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the magnetic disc for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a plurality of suspension arms, each having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof, one of the suspension arms carrying a magnetic head on the upper face of the magnetic disc and another of the suspension arms carrying a magnetic head on the lower face of them magnetic disc; respective fastening means disposed on said actuator arm for detachably connecting the second ends of said one and said other suspension arms to said actuator arm, said fastening means being accessible for fastening and unfastening in a single vectorial direction substantially perpendicular to the plane of the disc, and said fastening means being disposed in a staggered relationship with respect to each other in terms of the direction of access to said fastening means whereby both said one and said other suspension arms may be attached or detached from the actuator arm using the same direction of access without first disassembling the apparatus.
Claim 3
Dependent Claim
35 words
A magnetic disc apparatus as claimed in claim 1 wherein said fastening means are disposed in a staggered relationship with respect to a line in the plane of the disc and tangent to the disc.
Claim 4
Dependent Claim
30 words
A magnetic disc apparatus as claimed in claim 1 wherein said fastening means are disposed in a staggered relationship with respect to radial distance from the center of the disc.
Claim 5
Dependent Claim
279 words
A magnetic disc apparatus including a disc drive assembly which drives a plurality of coaxially arranged parallel magnetic discs with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the upper and lower faces of the magnetic discs for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a first plurality and a second plurality of suspension arms, each suspension arm having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof, the suspension arms carrying a magnetic head on each face of each of the magnetic discs; a first plurality and a second plurality of fastening means disposed on said actuator arm for detachably connecting the second ends of said first and second pluralities of suspension arms, respectively, to said actuator arm, said first plurality of fastening means being accessible for fastening and unfastening in a first vectorial direction substantially perpendicular to the plane of the disc, said second plurality of fastening means being accessible for fastening and unfastening in a second vectorial direction approximately 180 degrees from the first direction, each of said first plurality of fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the first direction of access to said first plurality of fastening means, and each of said second plurality of fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the second direction of access to said second plurality of fastening means.
Claim 6
Dependent Claim
279 words
A magnetic disc apparatus including a disc drive assembly which drives a plurality of coaxially arranged parallel magnetic discs with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the upper and lower faces of the magnetic discs for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a first plurality and a second plurality of suspension arms, each suspension arm having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof, the suspension arms carrying a magnetic head on each face of each of the magnetic discs; a first plurality and a second plurality of fastening means disposed on said actuator arm for detachably connecting the second ends of said first and second pluralities of suspension arms, respectively, to said actuator arm, said first plurality of fastening means being accessible for fastening and unfastening in a first vectorial direction substantially perpendicular to the plane of the disc, said second plurality of fastening means being accessible for fastening and unfastening in a second vectorial direction approximately 180 degrees from the first direction, each of said first plurality of fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the first direction of access to said first plurality of fastening means, and each of said second plurality of fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the second direction of access to said second plurality of fastening means.
Claim 7
Dependent Claim
174 words
A magnetic disc apparatus including a disc drive assembly which drives a plurality of coaxially arranged parallel magnetic discs with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the upper and lower faces of the magnetic discs for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a plurality of suspension arms, each having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof; a plurality of fastening means disposed on said actuator arm for detachably connecting the second ends of said suspension arms to said actuator arm, said fastening means being accessible for fastening and unfastening in a single vectorial direction substantially perpendicular to the planes of the discs, and said fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the direction of access to said fastening means.
Claim 8
Dependent Claim
174 words
A magnetic disc apparatus including a disc drive assembly which drives a plurality of coaxially arranged parallel magnetic discs with upper and lower faces bearing a magnetic data storage medium, a plurality of magnetic recording heads, and a head supporting assembly supporting the magnetic heads at predetermined relationships with respect to the upper and lower faces of the magnetic discs for magnetic recording and reproducing thereon, the head supporting assembly comprising: an actuator arm; a plurality of suspension arms, each having a magnetic head mounted on a first end thereof and connected to said actuator arm at a second end thereof; a plurality of fastening means disposed on said actuator arm for detachably connecting the second ends of said suspension arms to said actuator arm, said fastening means being accessible for fastening and unfastening in a single vectorial direction substantially perpendicular to the planes of the discs, and said fastening means being disposed in a consecutively offset relationship with respect to each other in terms of the direction of access to said fastening means.
References Cited (Backward Citations)
US4349851A
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JPS59218666A
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JPH0629986A
Cited
JPH0629988A
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JPH0689880A
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JPH06129474A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |