US4669076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disk drive apparatus with means for accurate disk positioning
Assignee: International Business Machines Corp
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Filing: 1985-10-30
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Granted: 1987-05-26
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Expires: 2005-10-30
Abstract
Abstract A front-loading optical disk drive is disclosed that registers an optical disk about the spindle precisely relative to the optical head. First, the spindle and the corresponding clamping assembly have means to accurately register the disk onto the spindle. Second, the critical components of the optical disk drive such as the spindle, the clamping assembly, the optical head, and the guides and stops for the optical disk, are all positioned relative to a single point in the disk drive. This eliminates the build up of manufacturing tolerances between the critical components. By precisely registering the optical disk onto the spindle, and precisely positioning all the critical components relative to a single point, the optical disk will be precisely registered to the optical head.
Inventors
- 👤 Walter E. Broom
- 👤 Michael Henry
- 👤 William J. Schaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:06
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/02; G11B33/027; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
An optical disk drive for receiving an optical disk having a raised annulus near its outer periphery for sliding contact with said disk drive during insertion and removal of the optical disk, said optical disk drive comprising: a base frame member having a socket joint; a ball mounted into said socket joint; said ball and said socket forming a single common pivot point; a disk loading frame suspended from said ball; a front face connected to said base frame member; said optical disk extending beyond said front face during play; a door pivotally mounted to said front face for effectuating movement to said loading frame, said door having a closed position for lowering said loading frame, and said door having an opened position for raising said loading frame; said door having a protruding portion which encases said optical disk when said door is in said closed position; a spindle positionally mounted from said single common pivot point having a straight portion and a surrounding face for centering said optical disk; and a top cover mounted to said frame having stops positionally locatable from said single common pivot point.
Claim 2
Dependent Claim
188 words
An optical disk drive for receiving an optical disk having a raised annulus near its outer periphery for sliding contact with said disk drive during insertion and removal of the optical disk, said optical disk drive comprising: a base frame member having a socket joint; a ball mounted into said socket joint; said ball and said socket forming a single common pivot point; a disk loading frame suspended from said ball; a front face connected to said base frame member; said optical disk extending beyond said front face during play; a door pivotally mounted to said front face for effectuating movement to said loading frame, said door having a closed position for lowering said loading frame, and said door having an opened position for raising said loading frame; said door having a protruding portion which encases said optical disk when said door is in said closed position; a spindle positionally mounted from said single common pivot point having a straight portion and a surrounding face for centering said optical disk; and a top cover mounted to said frame having stops positionally locatable from said single common pivot point.
Claim 3
Dependent Claim
65 words
An optical disk drive for receiving an optical disk comprising: a frame having a front face; an optical disk extending beyond said front face during play; and a door pivotally mounted to said front face having a protruding portion which encases said optical disk when said door is in said closed position to prevent laser rays from escaping during operation of the optical disk drive.
Claim 4
Dependent Claim
65 words
An optical disk drive for receiving an optical disk comprising: a frame having a front face; an optical disk extending beyond said front face during play; and a door pivotally mounted to said front face having a protruding portion which encases said optical disk when said door is in said closed position to prevent laser rays from escaping during operation of the optical disk drive.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |