US5022039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas laser oscillator device
Assignee: Fanuc Corp
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Filing: 1989-09-29
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Granted: 1991-06-04
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Expires: 2009-09-29
Abstract
Abstract A turbo blower for a laser comprises a motor which includes a shaft (17) having a distal end to which a turbo impeller (16) is mounted, a pair of bearings (22,23) for supporting the shaft (17), a rotor (19(, and a stator (20). A squeezed-film damper (36,37) is provided around each of the bearings (22,23), whereby vibration of the blower is damped. The damping coefficient of the squeezed-film dampers (36,37) are different from each other, whereby vibration at the bearing is reduced.
Inventors
- 👤 Norio Karube
- 👤 Tsutomu Funakubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:54
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/059; F04D29/66; F04D29/661; F04D29/668; F16; F16C; F16C27/00; F16C27/04; F16C27/045; H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/036; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672; H02K5/173; H02K5/1732; F16C2360/00; F16C2360/44; F16C2380/00; F16C2380/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A gas laser oscillator device having an electric discharge tube for producing an electric discharge in a laser gas contained in the electric discharge tube for laser excitation, an optical resonator for effecting laser oscillation, and a gas circulating device having a gas blower and a cooling unit for forcibly cooling the laser gas, said blower comprises a turbo impeller mounted on a shaft and rotatable in the laser gas and an electric motor for rotating said shaft to drive said turbo impeller, said shaft being supported by bearings provided with a squeezed-film damper filler with grease whereby vibration of the blower is reduced.
Claim 2
Dependent Claim
104 words
A gas laser oscillator device having an electric discharge tube for producing an electric discharge in a laser gas contained in the electric discharge tube for laser excitation, an optical resonator for effecting laser oscillation, and a gas circulating device having a gas blower and a cooling unit for forcibly cooling the laser gas, said blower comprises a turbo impeller mounted on a shaft and rotatable in the laser gas and an electric motor for rotating said shaft to drive said turbo impeller, said shaft being supported by bearings provided with a squeezed-film damper filler with grease whereby vibration of the blower is reduced.
Claim 3
Dependent Claim
24 words
A gas laser oscillator device according to claim 1, wherein a region in which the grease is filler is externally sealed by an O-rings.
Claim 4
Dependent Claim
17 words
A gas laser oscillator device according to claim 1, wherein said bearings each comprise a ball bearing.
Claim 5
Dependent Claim
17 words
A gas laser oscillator device according to claim 1, wherein said bearings each comprise a plain bearing.
Claim 6
Dependent Claim
56 words
A turbo blower for a laser, comprising a motor which includes a shaft having a distal end to which a turbo impeller is mounted, a pair of bearings for supporting the shaft, a rotor, and a stator, wherein a squeezed film damper is provided around each of said bearings whereby vibration of the blower is reduced.
Claim 7
Dependent Claim
56 words
A turbo blower for a laser, comprising a motor which includes a shaft having a distal end to which a turbo impeller is mounted, a pair of bearings for supporting the shaft, a rotor, and a stator, wherein a squeezed film damper is provided around each of said bearings whereby vibration of the blower is reduced.
Claim 8
Dependent Claim
52 words
A turbo blower according to claim 5, wherein one of said squeezed-film dampers is closer to said turbo impeller than the other of said squeezed film dampers and the damping coefficient of said one of said squeezed-film dampers closer to said turbo impeller is smaller than that of the other squeezed-film damper.
Claim 9
Dependent Claim
15 words
A turbo blower according to claim 5, wherein said bearings each comprise a ball bearing.
Claim 10
Dependent Claim
15 words
A turbo blower according to claim 5, wherein said bearings each comprise a plain bearing.
Claim 11
Dependent Claim
35 words
A turbo blower according to claim 5, which further includes a sleeve and a housing around each bearing, with a clearance between said sleeve and said housing, said squeezed-film damper being positioned in said clearance.
Claim 12
Dependent Claim
24 words
A turbo blower according to claim 9, wherein the damping coefficient of each of said squeezed film dampers is changed by varying said clearance.
Claim 13
Dependent Claim
14 words
A turbo blower according to claim 10, wherein said clearance is filled with grease.
Claim 14
Dependent Claim
15 words
A turbo blower according to claim 11, wherein said clearance is externally sealed by O-rings.
Claim 15
Dependent Claim
30 words
A turbo blower according to claim 5, wherein the damping coefficient of one of said squeezed-film dampers is different from the damping coefficient of the other of said squeezed-film dampers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |