Patent US5206873A successfully refreshed from Google Patents.
US5206873A
Expired / Lapsed
US
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Turbo blower for laser and laser oscillation device employing the turbo blower
Assignee: Fanuc Corp
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Filing: 1990-09-21
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Granted: 1993-04-27
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Expires: 2010-09-21
Abstract
Abstract A turbo blower is used in combination with a gas laser oscillation device for machining, e.g., cutting off, workpieces. The turbo blower comprises a shaft (2) having an impeller (1) on one end thereof, a pair of bearings (5, 6) on which the shaft (2) is supported, and a motor (3, 4) for rotating the shaft. Heat radiating fins (11) are mounted on the shaft (2) for radiating the heat which is generated by a rotor (3) of the motor, thus preventing the heat from being transmitted to the bearings (5, 6). The heat radiating fins are forcibly cooled by a portion of a laser gas for thereby greatly increasing the heat radiation efficiency. The service life of the grease in the bearings and the bearings themselves is increased, thus reducing an expenditure of labor for grease replenishment and bearing replacement. The bearings are also increased in reliability.
Inventors
- 👤 Tsutomu Funakubo
- 👤 Norio Karube
- 👤 Kenji Nakahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:49
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/059; F04D29/58; F04D29/582; F04D29/584; F04D29/5853; H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/036
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
43 words
A turbo blower for a laser, comprising a rotatable shaft having an impeller on one end therof, a pair of bearings supporting said shaft, a motor for rotating said shaft, and a heat radiating fin structure mounted on said shaft for rotation therewith.
Claim 2
Dependent Claim
43 words
A turbo blower for a laser, comprising a rotatable shaft having an impeller on one end therof, a pair of bearings supporting said shaft, a motor for rotating said shaft, and a heat radiating fin structure mounted on said shaft for rotation therewith.
Claim 3
Dependent Claim
23 words
A turbo blower according to claim 1, wherein is included means for directing a flow of laser gas past said heat radiating fins.
Claim 4
Dependent Claim
20 words
A turbo blower according to claim 2, further including a respective oil film damper mechanism for each of said bearings.
Claim 5
Dependent Claim
13 words
A turbo blower according to claim 2, wherein said bearings comprise ball bearings.
Claim 6
Dependent Claim
13 words
A turbo blower according to claim 2, wherein said bearings comprise roller bearings.
Claim 7
Dependent Claim
14 words
A turbo blower according to claim 2, wherein said bearings are made of ceramic.
Claim 8
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 2.
Claim 9
Dependent Claim
46 words
A turbo blower according to claim 1, wherein one of said bearings is located between the motor and the impeller and the other bearing is located on the opposite side of the motor, said heat radiating fins being disposed between said motor and the other bearing.
Claim 10
Dependent Claim
20 words
A turbo blower according to claim 8, further including a respective oil film damper mechanism for each of said bearings.
Claim 11
Dependent Claim
13 words
A turbo blower according to claim 8, wherein said bearings comprise ball bearings.
Claim 12
Dependent Claim
13 words
A turbo blower according to claim 8, wherein said bearings comprise roller bearings.
Claim 13
Dependent Claim
14 words
A turbo blower according to claim 8, wherein said bearings are made of ceramic.
Claim 14
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 8.
Claim 15
Dependent Claim
49 words
A turbo blower according to claim 1, wherein a first part of said heat radiating fin structure is disposed between said motor and said one of said bearings, and a second part of said heat radiating fin structure is disposed between said motor and the other of said bearings.
Claim 16
Dependent Claim
20 words
A turbo blower according to claim 14, further including a respective oil film damper mechanism for each of said bearings.
Claim 17
Dependent Claim
13 words
A turbo blower according to claim 14, wherein said bearings comprise ball bearings.
Claim 18
Dependent Claim
13 words
A turbo blower according to claim 14, wherein said bearings comprise roller bearings.
Claim 19
Dependent Claim
14 words
A turbo blower according to claim 14, wherein said bearings are made of ceramic.
Claim 20
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 14.
Claim 21
Dependent Claim
20 words
A turbo blower according to claim 1, further including a respective oil film damper mechanism for each of said bearings.
Claim 22
Dependent Claim
13 words
A turbo blower according to claim 20, wherein said bearings comprise ball bearings.
Claim 23
Dependent Claim
13 words
A turbo blower according to claim 20, wherein said bearings comprise roller bearings.
Claim 24
Dependent Claim
14 words
A turbo blower according to claim 20, wherein said bearings are made of ceramic.
Claim 25
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 20.
Claim 26
Dependent Claim
13 words
A turbo blower according to claim 1, wherein said bearings comprise ball bearings.
Claim 27
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 25.
Claim 28
Dependent Claim
13 words
A turbo blower according to claim 1, wherein said bearings comprise roller bearings.
Claim 29
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 27.
Claim 30
Dependent Claim
14 words
A turbo blower according to claim 1, wherein said bearings are made of ceramic.
Claim 31
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 29.
Claim 32
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 1.
Claim 33
Dependent Claim
55 words
A laser oscillation device comprising a discharge tube for producing an electric discharge in a gas for laser excitation, an optical resonator for causing laser oscillation, and a gas circulator having a blower and cooling units for forcibly cooling a laser gas, characterized in that said blower comprises a turbo blower according to claim 31.
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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) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |