US5407378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water blasting process
Assignee: Church and Dwight Co Inc
•
Filing: 1993-07-23
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Granted: 1995-04-18
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Expires: 2013-07-23
Abstract
Abstract Wet blasting utilizing a high pressure liquid stream to clean, cut or drill a targeted surface is provided with improved efficiency by degassing the liquid stream. Deaeration of the liquid stream reduces atomization of the high pressure stream as it exits the blast nozzle and is directed against the targeted surface so as to improve the efficiency of the stripping action and improve pump efficiency.
Inventors
- 👤 James D. Shank, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:21
CPC Classifications
B; B24; B24C; B24C11/00; B24C11/005; B08; B08B; B08B3/00; B08B3/02; B24C1/00; B24C1/08; B24C1/086; B24C7/00; B24C7/0007; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0591; Y10T83/364
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
69 words
In a process for blasting wherein a liquid supply stream is pumped to a high pressure liquid stream, said high pressure liquid stream is directed to a blast nozzle to accelerate said high pressure stream and said accelerated high pressure stream is directed from said blast nozzle to a target surface, the improvement comprising: degassing said liquid supply stream prior to pumping said liquid supply stream to high pressure.
Claim 2
Dependent Claim
69 words
In a process for blasting wherein a liquid supply stream is pumped to a high pressure liquid stream, said high pressure liquid stream is directed to a blast nozzle to accelerate said high pressure stream and said accelerated high pressure stream is directed from said blast nozzle to a target surface, the improvement comprising: degassing said liquid supply stream prior to pumping said liquid supply stream to high pressure.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein said high pressure liquid stream is formed by pumping said liquid supply stream to a high pressure of at least about 1,000 psi.
Claim 4
Dependent Claim
29 words
The process of claim 2 wherein said high pressure liquid stream is formed by pumping said liquid supply stream to a high pressure of at least about 3,000 psi.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said liquid supply stream is water.
Claim 6
Dependent Claim
12 words
The process of claim 3 wherein said liquid supply stream is water.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein said degassing is achieved by subjecting said liquid supply stream to a vacuum.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein said degassing is achieved by sparging said liquid supply stream with a lighter gas which carries dissolved gases from said liquid stream.
Claim 9
Dependent Claim
19 words
The process of claim 7 wherein subsequent to said sparging the liquid supply stream is subjected to a vacuum.
Claim 10
Dependent Claim
21 words
The process of claim 8 wherein said liquid supply stream is water and said degassing removes air from the water stream.
Claim 11
Dependent Claim
13 words
The process of claim 9 wherein said lighter gas is CO 2 .
Claim 12
Dependent Claim
14 words
The process of claim 1 wherein said high pressure liquid stream contains abrasive particles.
Claim 13
Dependent Claim
20 words
The process of claim 11 wherein said abrasive particles are water soluble and said high pressure liquid stream is water.
Claim 14
Dependent Claim
14 words
The process of claim 12 wherein said water soluble abrasive particles comprise sodium bicarbonate.
Claim 15
Dependent Claim
20 words
The process of claim 11 wherein said abrasive particles are added to said liquid supply stream prior to said pumping.
Claim 16
Dependent Claim
15 words
The process of claim 11 wherein said particles are added to said high pressure stream.
Claim 17
Dependent Claim
20 words
The process of claim 1 wherein said blasting comprises blast cleaning wherein a contaminant is removed from said target surface.
Claim 18
Dependent Claim
22 words
The process of claim 1 wherein said blasting comprises cutting wherein said target surface is cut by said accelerated high pressure stream.
Claim 19
Dependent Claim
19 words
The process of claim 1 wherein said blasting is drilling wherein a hole is formed in said target surface.
Claim 20
Dependent Claim
11 words
The process of claim 1 wherein said target surface is metal.
Claim 21
Dependent Claim
11 words
The process of claim 1 wherein said target surface is non-metallic.
Claim 22
Dependent Claim
12 words
The process of claim 1 wherein said blast nozzle is hand operated.
Claim 23
Dependent Claim
26 words
The process of claim 4 wherein a liquid additive is included in said water stream to change the viscosity, specific gravity or surface tension of water.
Claim 24
Dependent Claim
11 words
The process of claim 22 wherein said additive is a surfactant.
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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) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |