US5265801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vortex tube used to supply LPHV air to spray apparatus
Assignee: EIDP Inc
•
Filing: 1991-05-23
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Granted: 1993-11-30
•
Expires: 2011-05-23
Abstract
Abstract A method of spraying a coating onto a substrate using low pressure, high volume air is disclosed. More specifically, the step of using a vortex tube with valves at both the hot and cold air discharge ends to supply the low pressure, high volume air to a spray gun is disclosed. The use of the vortex tube results in an inexpensive system, that can be used in electrically hazardous areas, and allows very precise control of air temperature.
Inventors
- 👤 John C. Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:07
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/1606; B05B7/1613; B05B7/02; B05B7/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
A method for spraying a coating material onto a substrate using warm air to atomize the coating, the improvement which comprises using a vortex tube to supply warm air to a means for spraying the coating material, said vortex tube having a vortex spin chamber into which compressed air is injected to produce a a relatively warm air stream at one end of the vortex tube and a relatively cold air stream at the other end of the vortex tube, and wherein a means for varying the warm air pressure and a means for varying the cold air pressure are both adjusted to obtain a desired temperature and pressure for the warm air supplied to a means for spraying the coating material.
Claim 2
Independent Claim
122 words
A method for spraying a coating material onto a substrate using warm air to atomize the coating, the improvement which comprises using a vortex tube to supply warm air to a means for spraying the coating material, said vortex tube having a vortex spin chamber into which compressed air is injected to produce a a relatively warm air stream at one end of the vortex tube and a relatively cold air stream at the other end of the vortex tube, and wherein a means for varying the warm air pressure and a means for varying the cold air pressure are both adjusted to obtain a desired temperature and pressure for the warm air supplied to a means for spraying the coating material.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said means for spraying the coating material is a spray gun.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the coating material is a paint.
Claim 5
Dependent Claim
14 words
The method of claim 3, wherein the paint is a high solids refinish paint.
Claim 6
Dependent Claim
23 words
The method of claim 1, wherein the pressure of the warm air supplied to the means for spraying is less than 15 psig.
Claim 7
Dependent Claim
27 words
The method of claim 1, wherein the the means for varying the cold air pressure is a valve on the cold air stream from the vortex tube.
Claim 8
Dependent Claim
32 words
The method of claim 1, wherein the means for varying the warm air pressure supplied to the means for spraying is a valve on the warm air stream from the vortex tube.
Claim 9
Dependent Claim
21 words
The method of claim 1, wherein the temperature of the air exiting the spray gun is 95° F. to 105° F.
Claim 10
Dependent Claim
39 words
The method of claim 1, wherein the warm air pressure is obtained by adjusting said means for varying the warm air pressure and the warm air temperature is obtained by adjusting the means for varying the cold air pressure.
Claim 11
Dependent Claim
26 words
The method of claim 1, wherein the pressure of the warm air and cold air stream from the vortex tube is measured by a pressure gauge.
Claim 12
Dependent Claim
18 words
The method of claim 1, wherein the temperature of the warm air is measured by a temperature gauge.
Claim 13
Dependent Claim
15 words
The method of claim 1, wherein the cold air exhaust is passed through a muffler.
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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) | 1996-11-29 | 1997-05-31 | 1997-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-29 | 2001-05-31 | 2001-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-29 | 2005-05-31 | 2005-11-30 | $7700.00 | Window Closed / Lapsed |