Patent US4811324A successfully refreshed from Google Patents.
US4811324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-sided disk player
Assignee: Pioneer Corp
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Filing: 1987-12-28
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Granted: 1989-03-07
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Expires: 2007-12-28
Abstract
Abstract A disk player for double-side disks, such as video disks, having a reduced overall size and simplified structure. The pickup, spindle, spindle motor, and disk clamper of the player are mounted on a rotary frame. To change from playing one side of the disk to the other, the disk is conveyed out of the player, the rotary frame is rotated through 180 degrees, and the disk conveyed back into the player. The disk is then again clamped against the spindle and played.
Inventors
- 👤 Yuji Ikedo
- 👤 Takahiro Okajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:34
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/22; G11B17/30; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B17/04; G11B17/0401; G11B17/0402; G11B17/0404
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A double-sided disk player comprising: a housing for housing said disk player; a spindle for rotating said disk; a clamper for pressing said disk against said spindle so that said disk is rotated by said spindle; a rotary frame carrying a pickup for reproducing a signal recorded on said disk; conveyor means for conveying said disk from a reproducing position whereat said disk is mounted on said spindle to a stand-by position whereat said disk is remote from said rotary frame to allow for the rotation thereof; and rotating means for rotating said rotary frame after said conveying means has conveyed said disk to said stand-by position.
Claim 2
Dependent Claim
107 words
A double-sided disk player comprising: a housing for housing said disk player; a spindle for rotating said disk; a clamper for pressing said disk against said spindle so that said disk is rotated by said spindle; a rotary frame carrying a pickup for reproducing a signal recorded on said disk; conveyor means for conveying said disk from a reproducing position whereat said disk is mounted on said spindle to a stand-by position whereat said disk is remote from said rotary frame to allow for the rotation thereof; and rotating means for rotating said rotary frame after said conveying means has conveyed said disk to said stand-by position.
Claim 3
Dependent Claim
13 words
The disk player of claim 1, wherein said conveyor means comprises a tray.
Claim 4
Dependent Claim
16 words
The disk player of claim 1, wherein said conveyor means comprises a plurality of feed rollers.
Claim 5
Dependent Claim
29 words
The disk player of claim 1, further comprising a spindle motor for rotating said spindle, said spindle motor, said spindle and said clamper being mounted on said rotary frame.
Claim 6
Dependent Claim
31 words
The disk player of claim 4, wherein said rotary frame comprises a pair of generally circular side frames, and a clamper frame and a spindle frame extending between said side frames.
Claim 7
Dependent Claim
55 words
The disk player of claim 5, wherein a gear is formed on an outer circumference of one of said side frames, and wherein said rotating means comprises a reversible motor and gear means coupled between an output shaft of said motor and said gear formed on said one of said one of said side frames.
Claim 8
Dependent Claim
29 words
The disk player of claim 1, wherein said conveyor means comprises means for lowering a disk between playing of a first side thereof and playing a second side thereof.
Claim 9
Dependent Claim
103 words
The disk player of claim 1 wherein when said disk is disposed in said stand-by position said clamper is separated from said spindle by a gap therebetween, said gap being vertically displaced when said rotary frame is rotated from a first position to a second position 180° therefrom due to the eccentricity of said gap with respect to the center of rotation of said rotary frame, said disk player further comprising means for vertically adjusting a conveying path of said disk such that said disk can be horizontally conveyed into said gap when said rotary frame is in said first or second position.
Claim 10
Dependent Claim
27 words
The disk player of claim 1, wherein said stand-by position is the eject position whereat the tray projects outside said housing such that disks can be interchanged.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |