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US4994931A Expired / Lapsed US ⏱️ 0.0 years remaining

Actuator structure for a magnetic head suspension assembly in a disk drive

Assignee: HP Inc
•
Filing: 1989-11-13
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Granted: 1991-02-19
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Expires: 2009-11-13
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Abstract

Abstract An actuator structure in which the arms which support the magnetic heads are of sheet material in back-to-back pairs having ends fitted into and clamped between the confronting faces of pads arranged in columns on an actuator body. The pads in each column are cantilevered from the body on deflectable supports, except for one rigid support substantially centrally positioned in each column. A bolt extending through axially aligned holes in the pads and the arms in each column applies pressure to deflect the pad supports and clamp the arms between the pads.

Inventors

  • 👤 Wayne E. Foote

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 22:27
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4813

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 191 words
An actuator structure for a magnetic head suspension in a disk memory drive, comprising: an actuator body: a plurality of mounting pads having holes therethrough; cantilever support means comprising a deflectable cantilever support for at least some of said pads, joining said pads to said body in longitudinally spaced end-to-end positions with the holes aligned, in pad positions defining two laterally spaced columns of pads on said body, the longitudinal spacing of said pads defining slots therebetween, corresponding slots in the respective columns occupying positions in the same plane; a plurality of arm structures of sheet material for individually supporting a magnetic head, disposed in back-to-back relationship in pairs with corresponding ends of said pairs having width straddling said columns and fitted into corresponding slots in said columns, laterally spaced openings in said ends being aligned with said holes in said pads; and an elongated member extending through said holes in said pads in each column for applying a force to the end pads of each column directed inwardly of each column to deflect said cantilever supports which are deflectable and clamp said ends of said arm structures between said pads.
Claim 2
Dependent Claim 191 words
An actuator structure for a magnetic head suspension in a disk memory drive, comprising: an actuator body: a plurality of mounting pads having holes therethrough; cantilever support means comprising a deflectable cantilever support for at least some of said pads, joining said pads to said body in longitudinally spaced end-to-end positions with the holes aligned, in pad positions defining two laterally spaced columns of pads on said body, the longitudinal spacing of said pads defining slots therebetween, corresponding slots in the respective columns occupying positions in the same plane; a plurality of arm structures of sheet material for individually supporting a magnetic head, disposed in back-to-back relationship in pairs with corresponding ends of said pairs having width straddling said columns and fitted into corresponding slots in said columns, laterally spaced openings in said ends being aligned with said holes in said pads; and an elongated member extending through said holes in said pads in each column for applying a force to the end pads of each column directed inwardly of each column to deflect said cantilever supports which are deflectable and clamp said ends of said arm structures between said pads.
Claim 3
Dependent Claim 24 words
The actuator structure according to claim 1, in which one cantilever support of said cantilever support means in each column is rigid cantilever support.
Claim 4
Dependent Claim 21 words
The actuator structure according to claim 2, in which: said one cantilever support in each column is disposed substantially centrally therein.
Claim 5
Dependent Claim 28 words
The actuator structure according to claim 1, in which: said actuator body, pads, cantilever support means and arm structures are of materials having nearly the same thermal coefficients.
Claim 6
Dependent Claim 21 words
The actuator structure according to claim 1, in which: said actuator body, said pads and said cantilever support means are integral.
Claim 7
Dependent Claim 23 words
The actuator structure according to claim 1, in which: said actuator body, pads, cantilever supports and arm structures are of the same material.
Claim 8
Dependent Claim 22 words
The actuator structure according to claim 6, in which: said actuator body, pads, cantilever supports and arm structures are of stainless steel.
Claim 9
Dependent Claim 29 words
The actuator structure according to claim 1, in which: said actuator body is pivotally mounted for angular movement about an axis paralleling said at least two columns of pads.
Claim 10
Dependent Claim 41 words
The actuator structure according to claim 8, in which: said actuator body is a cylindrical body and said least two columns of pads are supported in circumferentially spaced positions adjacent the cylindrical surface of said cylindrical body by said cantilever supports.
Claim 11
Dependent Claim 20 words
The actuator structure according to claim 1, comprising: motor means connected to said actuator body for moving said actuator structure.
Claim 12
Dependent Claim 21 words
The actuator structure according to claim 9, comprising: motor means connected to said cylindrical body for angularly displacing said cylindrical body.

References Cited (Backward Citations)

US4131921A Cited
US4116284A Cited
SU696536A1 Cited
SU769616A1 Cited
US4544972A Cited
US4571649A Cited
US4739430A Cited
US4716482A Cited
US4716478A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1994-02-18 1994-08-20 1995-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1998-02-18 1998-08-20 1999-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2002-02-18 2002-08-20 2003-02-19 $7700.00 Window Closed / Lapsed

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