Patent US3558051A successfully refreshed from Google Patents.
US3558051A
Expired / Lapsed
US
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Multi-material spray gun, spray coating system and method of quickly changing the material being sprayed
Assignee: Inland Steel Co
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Filing: 1967-11-02
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Granted: 1971-01-26
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Expires: 1987-11-02
Abstract
Abstract A multimaterial spray gun characterized by its ability to quickly change from one material to another by spraying through a single nozzle which includes a body having n chambers each adapted to receive respective different ones of n preselected materials, a common discharge nozzle having a spray passage therethrough, means coupling the spray passage to each of the n chambers and valves for selectively opening and closing the coupling means, a spray coating system using the spray gun wherein the material being sprayed utilizes a part of the system while another portion of the system is simultaneously being flushed to remove the previously sprayed material and a method for quickly changing from one material being sprayed to another.
Inventors
- 👤 Jay H Strickler
- 👤 Richard C Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:10
CPC Classifications
B; B05; B05B; B05B12/00; B05B12/14; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/32; B05B9/00; B05B9/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
186 words
In a multimaterial spray gun for use with n sources containing respective different ones of n materials, the combination comprising, a body including a forward portion and a rear portion with a cavity defined therebetween, said forward portion having n chambers, means including an inlet and an outlet port in said forward portion leading to each of said chambers for connecting said chambers with respective ones of said sources so that said chambers receive a substantially continuous circulating stream of respective different ones of said n preselected materials therethrough, a common discharge nozzle in said forward portion having a spray chamber therethrough, passage means leading to said spray chamber from each of said n chambers, valve means disposed in each of said n chambers for preventing the flow of material from said chambers to said passage means, valve actuating means disposed in said rear portion and coupling means extending from said valve actuating means in the rear portion to said forward portion through said cavity to selectively open and close the valve means whereby selective ones of said n chambers are connected to said spray chamber.
Claim 2
Dependent Claim
186 words
In a multimaterial spray gun for use with n sources containing respective different ones of n materials, the combination comprising, a body including a forward portion and a rear portion with a cavity defined therebetween, said forward portion having n chambers, means including an inlet and an outlet port in said forward portion leading to each of said chambers for connecting said chambers with respective ones of said sources so that said chambers receive a substantially continuous circulating stream of respective different ones of said n preselected materials therethrough, a common discharge nozzle in said forward portion having a spray chamber therethrough, passage means leading to said spray chamber from each of said n chambers, valve means disposed in each of said n chambers for preventing the flow of material from said chambers to said passage means, valve actuating means disposed in said rear portion and coupling means extending from said valve actuating means in the rear portion to said forward portion through said cavity to selectively open and close the valve means whereby selective ones of said n chambers are connected to said spray chamber.
Claim 3
Dependent Claim
131 words
The spray gun of claim 1 wherein said valve means in the forward portion comprises a needle valve in each chamber sealing the passage therefrom, said valve coupling means constituting the stems of said needle valves extending between said forward and rear portions, said rear portion including n sets of bores each being aligned with one of said n chambers, said valve actuating means including a piston connected to the end of said needle valve stem disposed in said rear portion, means including an inlet opening in said rear portion leading to each of said bores for coupling a source of fluid under pressure thereto to force said pistons in one direction and spring means adapted to bias said pistons in an opposite direction to open and close the needle valve.
Claim 4
Dependent Claim
10 words
The spray gun of claim 1, wherein n is two.
Claim 5
Independent Claim
176 words
A method of quickly changing the material being sprayed in a multimaterial spray coating system, including at least one spray gun having n chambers each having inlet and outlet means, a common discharge nozzle having a spray passage therethrough, means coupling the spray passage to each of said chambers and valve means for selectively opening and closing the coupling means whereby selective ones of said n chambers are coupled to the spray passage, comprising, circulating under pressure materials from n sources of material continuously through the inlet and outlet means of different ones of the n chambers of said spray gun, preventing the passage of material being circulated through n- 1 chambers to said spray nozzle, allowing some of the circulating material from the remaining one of the n chambers to pass through said spray nozzle and then actuating said valve means preventing the passage of material from said previously used one of said n chambers and allowing some of the circulating material from another one of said n chambers to pass through said spray nozzle.
Claim 6
Independent Claim
176 words
A method of quickly changing the material being sprayed in a multimaterial spray coating system, including at least one spray gun having n chambers each having inlet and outlet means, a common discharge nozzle having a spray passage therethrough, means coupling the spray passage to each of said chambers and valve means for selectively opening and closing the coupling means whereby selective ones of said n chambers are coupled to the spray passage, comprising, circulating under pressure materials from n sources of material continuously through the inlet and outlet means of different ones of the n chambers of said spray gun, preventing the passage of material being circulated through n- 1 chambers to said spray nozzle, allowing some of the circulating material from the remaining one of the n chambers to pass through said spray nozzle and then actuating said valve means preventing the passage of material from said previously used one of said n chambers and allowing some of the circulating material from another one of said n chambers to pass through said spray nozzle.
Claim 7
Dependent Claim
49 words
The method of claim 4, wherein at least one of the materials that have been prevented from being sprayed is replaced by a solvent for the respective material which is circulated through the said n chambers so that a different material can be thereafter circulated through the cleaned chamber.
Claim 8
Dependent Claim
43 words
The method of claim 5 wherein said one chamber of the spray gun is cleaned with solvent circulating therethrough and a different material is circulated through the clean chamber during the operation of the spray gun with material from another of said chambers.
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |