US3797750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder spraying apparatus
Assignee: Atlas Copco AB
•
Filing: 1972-11-09
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Granted: 1974-03-19
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Expires: 1992-11-09
Abstract
Abstract In a powder spraying apparatus the powder is brought into fluidized state within a pressure vessel and in a conveying main conduit. Fluidizing is accomplished by pressure fluid acting through a sinter metal bed in the vessel and through a perforated supplementary conduit in the main conduit. When a control valve is opened, powder will flow for atomizing and coating purposes in the manner of a liquid from the pressure vessel to spray guns.
Inventors
- 👤 K Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:07
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0046; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032; B05B5/16; B05B5/1683; B24C5/00; B24C5/02; B24C5/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
192 words
A powder spraying apparatus comprising a spray gun having a spraying material passage therein, a powder supply means and a conduit extending from the powder supply means to the spray gun, said conduit being connected to the spray gun for supplying powder to said spraying material passage therein, the improvement wherein: said powder supply means includes: a pressure vessel provided with a powder chamber and a pressure chamber reCeiving a gaseous pressure fluid; and a wall portion in said pressure vessel between said chambers, said wall portion being permeable to pressure fluid for fluidizing powder in the powder chamber by means of pressure fluid penetrating through said wall portion; a valve is associated with said conduit, and the inlet of said conduit is disposed in the powder chamber for conveying powder fluidized in pressure fluid to said spraying material passage upon actuation of said valve; and said conduit includes a main conduit containing a perforated supplementary conduit for a gaseous pressure fluid, the pressure fluid penetrating into said main conduit from said supplementary conduit through the perforations thereof to thereby amplify the flowability of the powder when being conveyed in the conduit.
Claim 2
Dependent Claim
192 words
A powder spraying apparatus comprising a spray gun having a spraying material passage therein, a powder supply means and a conduit extending from the powder supply means to the spray gun, said conduit being connected to the spray gun for supplying powder to said spraying material passage therein, the improvement wherein: said powder supply means includes: a pressure vessel provided with a powder chamber and a pressure chamber reCeiving a gaseous pressure fluid; and a wall portion in said pressure vessel between said chambers, said wall portion being permeable to pressure fluid for fluidizing powder in the powder chamber by means of pressure fluid penetrating through said wall portion; a valve is associated with said conduit, and the inlet of said conduit is disposed in the powder chamber for conveying powder fluidized in pressure fluid to said spraying material passage upon actuation of said valve; and said conduit includes a main conduit containing a perforated supplementary conduit for a gaseous pressure fluid, the pressure fluid penetrating into said main conduit from said supplementary conduit through the perforations thereof to thereby amplify the flowability of the powder when being conveyed in the conduit.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein one end of said supplementary conduit is connected to said pressure chamber in said pressure vessel.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1 wherein said supplementary conduit is a perforated hose loosely inserted into said main conduit.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 2 wherein said supplementary conduit is a perforated hose loosely inserted into said main conduit.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 1 wherein said supplementary conduit extends over at least a substantial portion of the length of said main conduit, said main conduit extending between said pressure vessel and said spray gun.
Claim 7
Dependent Claim
35 words
Apparatus according to claim 2 wherein said supplementary conduit extends over at least a substantial portion of the length of said main conduit, said main conduit extending between said pressure vessel and said spray gun.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 6 wherein the end of said supplementary conduit remote from said pressure vessel is plugged.
Claim 9
Dependent Claim
174 words
A powder spraying apparatus comprising a spray gun having a spraying material passage therein, a powder supply means and a conduit extending from the powder supply means to the spray gun, said conduit being connected to the spray gun for supplying powder to said spraying material passage therein, the improvement wherein: a valve is associated with said conduit; and said powder supply means includes: a pressure vessel provided with a pressure chamber receiving a pressurized gaseous pressure fluid and a powder chamber for maintaining the powder therein under pressure, the inlet of said conduit being disposed in said pressurized powder chamber; and a wall portion in said pressure vessel between said chambers, said wall portion being permeable to pressure fluid for enabling said chambers to be at substantially the same pressure and for fluidizing powder in the powder chamber by means of pressure fluid penetrating through said wall portion upon actuation of said valve, thereby conveying powder fluidized in pressure fluid through said conduit to said spraying material passage upon actuation of said valve.
Claim 10
Dependent Claim
174 words
A powder spraying apparatus comprising a spray gun having a spraying material passage therein, a powder supply means and a conduit extending from the powder supply means to the spray gun, said conduit being connected to the spray gun for supplying powder to said spraying material passage therein, the improvement wherein: a valve is associated with said conduit; and said powder supply means includes: a pressure vessel provided with a pressure chamber receiving a pressurized gaseous pressure fluid and a powder chamber for maintaining the powder therein under pressure, the inlet of said conduit being disposed in said pressurized powder chamber; and a wall portion in said pressure vessel between said chambers, said wall portion being permeable to pressure fluid for enabling said chambers to be at substantially the same pressure and for fluidizing powder in the powder chamber by means of pressure fluid penetrating through said wall portion upon actuation of said valve, thereby conveying powder fluidized in pressure fluid through said conduit to said spraying material passage upon actuation of said valve.
Claim 11
Dependent Claim
52 words
Apparatus according to claim 1 wherein said conduit includes a main conduit containing a perforated supplementary conduit for a gaseous pressure fluid, the pressure fluid penetrating into said main conduit from said supplementary conduit through the perforations thereof to thereby amplify the flowability of the powder when being conveyed in the conduit.
Claim 12
Dependent Claim
22 words
Apparatus according to claim 9 wherein one end of said supplementary conduit is connected to said pressure chamber in said pressure vessel.
Claim 13
Dependent Claim
19 words
Apparatus according to claim 9 wherein said supplementary conduit is a perforated hose loosely inserted into said main conduit.
Claim 14
Dependent Claim
19 words
Apparatus according to claim 10 wherein said supplementary conduit is a perforated hose loosely inserted into said main conduit.
Claim 15
Dependent Claim
35 words
Apparatus according to claim 9 wherein said supplementary conduit extends over at least a substantial portion of the length of said main conduit, said main conduit extending between said pressure vessel and said spray gun.
Claim 16
Dependent Claim
35 words
Apparatus according to claim 10 wherein said supplementary conduit extends over at least a substantial portion of the length of said main conduit, said main conduit extending between said pressure vessel and said spray gun.
Claim 17
Dependent Claim
19 words
Apparatus according to claim 14 wherein the end of said supplementary conduit remote from said pressure vessel is plugged.
Claim 18
Dependent Claim
15 words
Apparatus according to claim 8 wherein said pressure chamber is located below said powder chamber.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |