US5138477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light deflecting apparatus
Assignee: Toshiba Corp
•
Filing: 1990-10-25
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Granted: 1992-08-11
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Expires: 2010-10-25
Abstract
Abstract In a light deflecting apparatus having a motor shaft rotatable at high speed, bearings have a suitable simple construction such that the whole apparatus can be reduced in size and weight.
Inventors
- 👤 Ken Omura
- 👤 Seiichiro Fushimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:00
CPC Classifications
F; F16; F16C; F16C19/00; F16C19/54; F16C19/55; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/12; G02B26/121; G02B7/00; G02B7/18; G02B7/182; G02B7/1821; F16C2300/00; F16C2300/20; F16C2300/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
179 words
A light deflecting apparatus comprising: a rotating shaft; a rotatable light reflector for scanning a light beam and arranged on one end of the rotating shape; bearing means for rotatably supporting the rotating shaft, the bearing means having a first bearing member for rotatably supporting the rotating shaft and being arranged outside of the shaft and a second bearing member for rotatably supporting the first bearing member and being arranged outside of the first bearing member, each of said first and second bearing members being rotated at a speed of M or less when a maximum allowable rotation speed of each of said first and second bearing members is M and when said rotating shaft is rotated at a speed of 2 M or less; and means for rotating the rotating shaft, said rotating means including a rotor coil, a rotatable member integrated with the rotating shaft and fitted with the rotor coil, and a stator coil fixed to the body of the apparatus on the rotating-shaft side of the rotatable member so as to face the rotor coil.
Claim 2
Dependent Claim
179 words
A light deflecting apparatus comprising: a rotating shaft; a rotatable light reflector for scanning a light beam and arranged on one end of the rotating shape; bearing means for rotatably supporting the rotating shaft, the bearing means having a first bearing member for rotatably supporting the rotating shaft and being arranged outside of the shaft and a second bearing member for rotatably supporting the first bearing member and being arranged outside of the first bearing member, each of said first and second bearing members being rotated at a speed of M or less when a maximum allowable rotation speed of each of said first and second bearing members is M and when said rotating shaft is rotated at a speed of 2 M or less; and means for rotating the rotating shaft, said rotating means including a rotor coil, a rotatable member integrated with the rotating shaft and fitted with the rotor coil, and a stator coil fixed to the body of the apparatus on the rotating-shaft side of the rotatable member so as to face the rotor coil.
Claim 3
Dependent Claim
36 words
The light deflecting apparatus according to claim 1, wherein said rotatable member has said rotor coil coaxial with the rotating shaft, and a cutaway form of said rotatable member along the rotating shaft is substantially U-shaped.
Claim 4
Dependent Claim
18 words
The light deflecting apparatus according to claim 1, wherein said first and second bearings members have ball bearings.
Claim 5
Dependent Claim
18 words
The light deflecting apparatus according to claim 1, wherein said first and second bearing members have roller bearings.
Claim 6
Dependent Claim
19 words
The light deflecting apparatus according to claim 1, wherein said first and second bearing members have solid sleeve bearings.
Claim 7
Dependent Claim
16 words
The light deflecting apparatus according to claim 1, wherein said rotating means has a flat motor.
Claim 8
Dependent Claim
48 words
A light deflecting apparatus according to claim 1, further comprising a third bearing member for rotatably supporting the rotating shaft and being arranged outside of the shaft and a fourth bearing member for rotatably supporting the third bearing member and being arranged outside of the third bearing member.
Claim 9
Dependent Claim
39 words
A light deflecting apparatus according to claim 7, wherein the first and second bearing members are arranged adjacent to the rotatable member, and the third and fourth bearing members are arranged on the other end of the rotating shaft.
Claim 10
Dependent Claim
17 words
A light deflecting apparatus according to claim 7, wherein the third and fourth bearing members are coplanar.
Claim 11
Dependent Claim
17 words
A light deflecting apparatus according to claim 9, wherein the first and second bearing members are coplanar.
Claim 12
Dependent Claim
17 words
A light deflecting apparatus according to claim 1, wherein the first and second bearing members are coplanar.
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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) | 1995-08-11 | 1996-02-10 | 1996-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-11 | 2000-02-10 | 2000-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-11 | 2004-02-10 | 2004-08-11 | $7700.00 | Window Closed / Lapsed |