Patent US3668549A successfully refreshed from Google Patents.
US3668549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended closed cycle gas laser system
Assignee: RTX Corp
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Filing: 1969-09-10
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Granted: 1972-06-06
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Expires: 1989-09-10
Abstract
Abstract A flowing gas laser system is connected to a closed cycle, so that the gas effluent is reused, the gases being refrigerated to a temperature between 100* F and minus 40* F, or lower utilizing either heat exchange with a refrigeration cycle or gas expansion means, with or without additional pre-cooling utilizing ambient heat exchangers. Embodiments include premixed laser systems, and mixing type systems wherein the lasing gas is separated from other gases, in which case cooling to a point below ambient takes place after the separation.
Inventors
- 👤 Frank R Biancardi
- 👤 Gorken Melikian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:11
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/0979
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
116 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and the inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising a heat exchanger in heat exchange relationship with a closed cycle refrigeration system.
Claim 2
Dependent Claim
116 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and the inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising a heat exchanger in heat exchange relationship with a closed cycle refrigeration system.
Claim 3
Dependent Claim
112 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling meaNs connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising gas expansion means located just upstream of said inlet.
Claim 4
Dependent Claim
112 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling meaNs connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising gas expansion means located just upstream of said inlet.
Claim 5
Dependent Claim
231 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser, said inlet means comprising a first inlet for gases excluding lasing gas, and a second inlet for gases including at least the lasing gas; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; gas separating means connected in series with said conduit means downstream of said driven compressor for removing lasing gas from the gas effluent from the outlet of said laser, said separating means having a first outlet for gas excluding lasing gas and a second outlet for lasing gas; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature of between minus 60* F and plus 100* F, said cooling means comprising a related cooling means in each of two gas flow paths from respective outlets of said gas separating means, one of said paths including conduits and a cooling means located between said first outlet and said first inlet and the other of said paths including conduits and a cooling means located between said second outlet and said second inlet.
Claim 6
Dependent Claim
231 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser, said inlet means comprising a first inlet for gases excluding lasing gas, and a second inlet for gases including at least the lasing gas; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; gas separating means connected in series with said conduit means downstream of said driven compressor for removing lasing gas from the gas effluent from the outlet of said laser, said separating means having a first outlet for gas excluding lasing gas and a second outlet for lasing gas; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature of between minus 60* F and plus 100* F, said cooling means comprising a related cooling means in each of two gas flow paths from respective outlets of said gas separating means, one of said paths including conduits and a cooling means located between said first outlet and said first inlet and the other of said paths including conduits and a cooling means located between said second outlet and said second inlet.
Claim 7
Dependent Claim
31 words
The closed cycle gas laser system according to claim 3 wherein one of said related cooling means comprises gas expansion means located in the corresponding one of said gas flow paths.
Claim 8
Dependent Claim
41 words
The closed cycle gas laser system according to claim 3 wherein one of said related cooling means comprises a heat exchanger in heat exchange relationship with a closed cycle refrigeration system located in the related one of said gas flow paths.
Claim 9
Dependent Claim
130 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising a heat exchanger in heat exchange relationship with a closed cycle refrigeration system, and a gas expander, said gas expander being located downstream of said heat exchanger.
Claim 10
Dependent Claim
130 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means comprising a heat exchanger in heat exchange relationship with a closed cycle refrigeration system, and a gas expander, said gas expander being located downstream of said heat exchanger.
Claim 11
Dependent Claim
46 words
The closed cycle gas laser system according to claim 3 wherein said one of said related cooling means comprises a heat exchanger in heat exchange relationship with a closed cycle refrigeration system, and a gas expander, said gas expander being located downstream of said heat exchanger.
Claim 12
Dependent Claim
46 words
The closed cycle gas laser system according to claim 4 wherein said one of said related cooling means comprises a heat exchanger in heat exchange relationship with a closed cycle refrigeration system, and a gas expander, said gas expander being located downstream of said heat exchanger.
Claim 13
Dependent Claim
46 words
The closed cycle gas laser system according to claim 5 wherein said one of said related cooling means comprises a heat exchanger in heat exchange relationship with a closed cycle refrigeration system, and a gas expander, said gas expander being located downstream of said heat exchanger.
Claim 14
Dependent Claim
135 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said gas flow means further comprising heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 15
Dependent Claim
135 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said gas flow means further comprising heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 16
Dependent Claim
47 words
The closed cycle gas laser system according to claim 1 wherein said gas flow means further comprises heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 17
Dependent Claim
47 words
The closed cycle gas laser system according to claim 2 wherein said gas flow means further comprises heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 18
Dependent Claim
47 words
The closed cycle gas laser system according to claim 3 wherein said gas flow means further comprises heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 19
Dependent Claim
47 words
The closed cycle gas laser system according to claim 4 wherein said gas flow means further comprises heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 20
Dependent Claim
47 words
The closed cycle gas laser system according to claim 5 wherein said gas flow means further comprises heat exchange means operative in response to ambient temperature coolant connected serially in said flow means between the outlet of said laser and said compressor for cooling said gas flow.
Claim 21
Dependent Claim
129 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means further comprising heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 22
Dependent Claim
129 words
A closed cycle gas laser system comprising: a gas laser having a gas inlet means for receiving gases into said laser and a gas outlet means for discharging gases from said laser; gas flow means comprising a driven compressor and conduits for causing a flow of gases from said outlet means to said inlet means; and cooling means connected in series with said conduits of said gas flow means between the outflow of said compressor and said inlet means for cooling said gas flow to a temperature on the order of between minus 60* F and plus 100* F, said cooling means further comprising heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 23
Dependent Claim
41 words
The closed cycle gas laser system according to claim 1 wherein said cooling means further comprises: heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 24
Dependent Claim
41 words
The closed cycle gas laser system according to claim 2 wherein said cooling means further comprises: heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 25
Dependent Claim
41 words
The closed cycle gas laser system according to claim 3 wherein said cooling means further comprises: heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 26
Dependent Claim
41 words
The closed cycle gas laser system according to claim 4 wherein said cooling means further comprises: heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
Claim 27
Dependent Claim
41 words
The closed cycle gas laser system according tO claim 5 wherein said cooling means further comprises: heat exchange means responsive to ambient coolant connected serially in said flow means between said compressor and said inlet means for cooling said gas flow.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |