US4323939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard fixed disc drive assembly and read-write head actuator
Assignee: Seagate Technology LLC
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Filing: 1980-04-11
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Granted: 1982-04-06
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Expires: 2000-04-11
Abstract
Abstract A hard fixed head disc drive assembly having a rotating record disc with a transducer cooperating with the surface of the disc. The transducer is mounted on a carriage which has three spaced, grooved bearings, two of which are received by a fixed cylindrical track, the third bearing engages a spring-loaded cylindrical track which urges said first two bearings against said fixed track, whereby the carriage is centered on said tracks for movement therealong radially of said disc surface.
Inventors
- 👤 Syed H. Iftikar
- 👤 David L. Reeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B23/00; G11B23/50; G11B23/505; G11B23/507
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
140 words
A disc drive including at least one disc, means for mounting said disc; means for driving said mounting means to rotate the disc; at least one transducer cooperating with the surface of said disc to read and write information on the surface; mounting means for mounting said transducer for cooperation with the disc; a carriage for said transducer mounting means; three spaced bearings having grooved outer surfaces mounted on said carriage; a fixed cylindrical track adapted to receive two of said bearings to guide the carriage; a spring-loaded cylindrical track adapted to engage the other bearing and urge said two bearings against the fixed tracks whereby the bearings are centered on said tracks for movement therealong; and means for driving the carriage to move the carriage along said tracks so that the transducers are moved radially along the disc surface.
Claim 2
Dependent Claim
140 words
A disc drive including at least one disc, means for mounting said disc; means for driving said mounting means to rotate the disc; at least one transducer cooperating with the surface of said disc to read and write information on the surface; mounting means for mounting said transducer for cooperation with the disc; a carriage for said transducer mounting means; three spaced bearings having grooved outer surfaces mounted on said carriage; a fixed cylindrical track adapted to receive two of said bearings to guide the carriage; a spring-loaded cylindrical track adapted to engage the other bearing and urge said two bearings against the fixed tracks whereby the bearings are centered on said tracks for movement therealong; and means for driving the carriage to move the carriage along said tracks so that the transducers are moved radially along the disc surface.
Claim 3
Dependent Claim
36 words
A drive assembly as in claim 1 including a drive motor having a drive shaft, a drive band secured to said carriage and driving by said drive shaft to move the carriage along said fixed track.
Claim 4
Dependent Claim
34 words
A disc drive as in claim 1 including a plurality of spaced discs and in which said mounting means includes means for mounting a plurality of heads for cooperation with each of said discs.
References Cited (Backward Citations)
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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) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |