Claims
- 1. A method of forming a spray nozzle comprising the steps of:
- etching a swirl chamber in a thin section of etchable material, said swirl chamber having a shape such that fluid to be sprayed can move therein in a vortex motion toward the center of the swirl chamber; and etching a spray orifice which extends through the thin section of material at the center of the swirl chamber such that fluid to be sprayed can move from said swirl chamber to said spray orifice and then exit the spray orifice in a conically-shaped film.
- 2. The method of claim 1 which further comprises the step of:
- etching in said thin section of material at least one feed slot which extends non-radially to said swirl chamber.
- 3. The method of claim 2 wherein said thin section of material has a first side and a second side and wherein said step of etching said swirl chamber comprises etching in said first side of said thin section of material a generally round-shaped swirl chamber cavity.
- 4. The method of claim 3 wherein said step of etching said spray orifice comprises etching an orifice through said second side of said thin section of material to said swirl chamber.
- 5. The method of claim 4 which further comprises the steps of:
- forming an inlet piece which can mate with said thin section of material;
- forming an inlet passage in said nozzle for conveying fluid to be sprayed to said at least one feed slot; and
- sealingly connecting said first side of said thin section of material to said inlet piece and connecting said inlet passage to said at least one feed slot.
- 6. The method of claim 5 wherein said thin section of material comprises a disk and further comprises the step of etching a feed annulus on said first side of said disk adjacent the periphery of said disk of such configuration as to be connected to said at least one feed slot of said disk and said inlet passage of said inlet piece for conveying fluid therebetween.
- 7. A method of forming a plurality of spray nozzles comprising the steps of:
- etching a plurality of spaced apart swirl chambers in a thin section of etchable material, said swirl chambers having a shape such that fluid to be sprayed can move in each swirl chamber in a vortex motion toward the center of the swirl chamber;
- etching a spray orifice which extends through the thin section of material at the center of each of said plurality of swirl chambers such that fluid to be sprayed can move from each swirl chamber to said spray orifice and then exit the spray orifice in a film; and
- dividing said thin section of material into separate spray nozzles each of which has one of said swirl chambers and orifices therein.
- 8. The method as in claim 7 wherein said step of dividing said thin section of material into separate spray nozzles comprises:
- etching a separation slot which extends through said thin section of material and around each spray nozzle except for one or more relatively thin support bridges.
- 9. The method of claim 8 which further comprises the steps of:
- etching in said thin section of material one or more feed slots which extend non-radially from each swirl chamber.
RELATED CASES
This application is a divisional of pending U.S. application Ser. No. 08/848,791, filed May 1, 1997 (now U.S. Pat. No. 5,740,967); which is a continuation of U.S. application Ser. No. 08/494,740, filed Jun. 16, 1995, now abandoned; which is a divisional of U.S. application Ser. No. 08/129,834, filed Sep. 30, 1993, now U.S. Pat. No 5,435,884, the disclosures of which are incorporated herein by reference.
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Non-Patent Literature Citations (1)
Entry |
Printed material by Harold C. Simmons entitled "Initial Spray Formation in Simplex Swirl-Atomizers (Fuel Nozzles)" presented at a conference on Jun. 20-24, 1982 at the Concourse Hotel in Madison, Wisconsin. |
Divisions (2)
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Number |
Date |
Country |
Parent |
848791 |
May 1997 |
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Parent |
129834 |
Sep 1993 |
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Continuations (1)
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Number |
Date |
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Parent |
494740 |
Jun 1995 |
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