Patent EP0162614A2 successfully refreshed from Google Patents.
EP0162614A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improved rotary actuator for a disc drive
Assignee: Seagate Technology LLC
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Filing: 1985-04-26
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Granted: —
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Expires: 2005-04-26
Abstract
Abstract The disclosure relates to a disc drive, in which the head/track included angle is minimised while providing the maximum arm stiffness with minimum inertia by providing a two-arm actuator (20, 21; 32) rotating about the common junction point (34) of the two arms. The two arms are mounted at an acute angle. The distal end (38) of the first arm (32) is stepped by a stepper motor (30) connected to the end of the arm. The distal end of the second arm (20, 21) carries the slider (42) and transducer (44). The gap of the transducer and main axis (56) of the slider are directly aligned with the main axis of the arm (21) so that the length of the arm between the pivot point and the point on the track being accessed is minimised.
Inventors
- 👤 Steven L. Kaczeus
- 👤 Robert Hoppe
- 👤 Hans H. Gatzen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B21/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A device for supporting a transducer in operating sensing position over a recording medium, said device comprising a slider having a transducer affixed thereto, said slider having a major axis extending approximately tangent to the track to be read at the centre of the recording medium; an arm assembly movable about a pivot, suspension means fastened to said arm assembly and said slider for holding said slider on said arm assembly so that said major axis extends through said pivot.
Claim 2
Independent Claim
80 words
A device for supporting a transducer in operating sensing position over a recording medium, said device comprising a slider having a transducer affixed thereto, said slider having a major axis extending approximately tangent to the track to be read at the centre of the recording medium; an arm assembly movable about a pivot, suspension means fastened to said arm assembly and said slider for holding said slider on said arm assembly so that said major axis extends through said pivot.
Claim 3
Dependent Claim
16 words
A device as claimed in Claim 1 wherein said recording medium is a magnetic recording disc.
Claim 4
Dependent Claim
33 words
A device as claimed in Claim 1 or Claim 2 wherein said arm has a major axis extending the length of said arm and substantially parallel to the major axis of the slider.
Claim 5
Independent Claim
45 words
A device as claimed in any of Claims 1 to 3 wherein said recording medium has a plurality of concentric recording tracks thereon and said device further comprising means for moving said arm rotationally about said pivot to move said transducer from track to track.
Claim 6
Dependent Claim
46 words
A device as claimed in Claim 4 wherein the included angle between the major axis of said slider and a tangent to the innermost or outermost track is no greated than 13 degrees. the major axis of said arm and said slider extend through said pivot.
Claim 7
Independent Claim
52 words
A device as claimed in any of Claims 4 to 6 wherein said moving means comprise a drive arm mounted at an acute angle to said slider carrying arm at said pivot, and stepper motor means for moving said drive arm, whereby said head is selectively positioned over one of said tracks.
Claim 8
Dependent Claim
44 words
A device as claimed in Claim 7 wherein said drive arm includes a curved head portion, said motor being connected to said curved head portion through a band which rests on said curved head portion as it unwraps from the shaft of said motor.
Claim 9
Independent Claim
37 words
A device as claimed in any of Claims 4 to 8 wherein the mass of said arm and the distance between said transducer and said pivot are selected as a function of the desired maximum included angle.
Claim 10
Dependent Claim
118 words
Head positioning apparatus for positioning magnetic read/write heads relative to a disc in a record/playback system, the disc magnetically storing information in concentric tracks, comprising a rotary stepper motor mounted to the machine chassis with the motor drive shaft extending therefrom a carriage which is coupled to said motor to move in a rotary path about a pivot point adjacent to said disc to move said read/write head from track to track, said read/write head comprising a slider having a transducer affixed thereto, said slider being connected to said pivot point through a flexure and an arm, said slider said flexure and said arm each having a major axis, the axes extending in parallel through said pivot point.
Claim 11
Dependent Claim
118 words
Head positioning apparatus for positioning magnetic read/write heads relative to a disc in a record/playback system, the disc magnetically storing information in concentric tracks, comprising a rotary stepper motor mounted to the machine chassis with the motor drive shaft extending therefrom a carriage which is coupled to said motor to move in a rotary path about a pivot point adjacent to said disc to move said read/write head from track to track, said read/write head comprising a slider having a transducer affixed thereto, said slider being connected to said pivot point through a flexure and an arm, said slider said flexure and said arm each having a major axis, the axes extending in parallel through said pivot point.
Claim 12
Dependent Claim
28 words
A device as claimed in Claim 10 wherein the major axis of the arm is substantially tangent to the center track of the concentric tracks on said disc.
Claim 13
Dependent Claim
43 words
12 . A device as claimed in Claim 11 wherein the includ- ed angle between the major axis of the slider and a tangent to the innermost or outermost track of the disc at the point accessed is no more than 13 degrees.
Claim 14
Dependent Claim
27 words
13 . A device as claimed in Claim 12 wherein the major axes of said arm said flexure and said slider coincide and extend through said pivot.
References Cited (Backward Citations)
No citation records indexed.
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