US 2003/0197073 A1 · Low pressure spray nozzle

Abstract

A spray nozzle is disclosed which includes an elongated nozzle body having an axially extending interior chamber and at least two radially extending air inlet ports communicating with the interior chamber. An elongated fluid inlet fitting having an axial fluid inlet passage is axially disposed within the interior chamber of the nozzle body. A fluid distribution insert is axially disposed within the axial fluid inlet passage of the fluid inlet fitting. The fluid distribution insert has an axial impact chamber formed therein, and an axial fluid feeding orifice which communicates with the axial impact chamber. An air swirling insert is disposed within the nozzle body. The air swirling insert has an interior bore for receiving the fluid distribution insert, and a fluid mixing orifice communicating with the fluid feeding orifice of the fluid distribution insert. A fluid metering insert is axially disposed within the impact chamber of the fluid distribution insert. The fluid metering insert has a metering orifice providing fluid communication between the impact chamber of the fluid distribution insert and the axial fluid inlet passage of the fluid inlet fitting. The metering orifice is offset from the axis of the fluid feeding orifice, and has a smaller diameter than the fluid feeding orifice.

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Drawings

Claims23

Dependent claims

A spray nozzle comprising:

a) an elongated nozzle body having an axially extending interior chamber and at least two radial air inlet ports communicating with the interior chamber;
b) a fluid inlet fitting axially disposed within the interior chamber of the nozzle body and having an axially extending fluid inlet passage;
c) a fluid distribution insert axially disposed within the fluid inlet passage of the fluid inlet fitting, the fluid distribution insert having an axially extending impact chamber formed therein, and an axial fluid feeding orifice which extends from the impact chamber;
d) an air swirling insert disposed within the interior chamber of the nozzle body, the air swirling insert having an axial bore for receiving the fluid distribution insert, and an axial fluid mixing orifice communicating with the axial fluid feeding orifice of the fluid distribution insert;
and
e) a fluid metering insert axially disposed within the impact chamber of the fluid distribution insert, the fluid metering insert having a metering orifice providing fluid communication between the impact chamber of the fluid distribution insert and the axial fluid inlet passage of the fluid inlet fitting, wherein the metering orifice of the fluid metering insert has a smaller diameter than the fluid feeding orifice of the fluid distribution insert.

3 more elements

A spray nozzle comprising:

a) an elongated nozzle body having an axially extending interior chamber defined in part by a tapered distal wall portion, the nozzle body having at least two radial air inlet ports communicating with the interior chamber;
b) a fluid inlet fitting axially disposed within the interior chamber of the nozzle body and having an axially extending fluid inlet passage defining a proximal fluid inlet port;
c) a fluid distribution insert axially disposed within a distal end portion of the fluid inlet passage of the fluid inlet fitting, the fluid distribution insert having an axially extending impact chamber formed therein, and an axial fluid feeding orifice which extends from the impact chamber;
d) an air swirling insert disposed within a distal end portion of the interior chamber of the nozzle body, the air swirling insert having an axial bore for receiving the fluid distribution insert, and an axial fluid mixing orifice communicating with the axial fluid feeding orifice of the fluid distribution insert;
and
e) a fluid metering insert axially disposed within the impact chamber of the fluid distribution insert, the fluid metering insert having a metering orifice providing fluid communication between the impact chamber of the fluid distribution insert and the axial fluid inlet passage of the fluid inlet fitting, wherein the metering orifice of the fluid metering insert is offset from the axis of the fluid feeding orifice.

3 more elements

A spray nozzle comprising:

a) an elongated nozzle body having an axially extending interior chamber defined in part by a tapered distal wall portion, the nozzle body having two diametrically opposed radial air inlet ports communicating with the interior chamber
b) a fluid inlet fitting axially disposed within the interior chamber of the nozzle body and having an axially extending fluid inlet passage defining a proximal fluid inlet port;
c) a fluid distribution insert axially disposed within a distal end portion of the axial fluid inlet passage of the fluid inlet fitting, the fluid distribution insert having an axially extending impact chamber formed therein, an axial fluid feeding orifice which extends from the impact chamber, and a radially inner set of circumferentially disposed air swirling vanes on an inwardly tapered exterior surface thereof;
d) an air swirling insert axially disposed within a distal portion of interior chamber of the nozzle body, the air swirling insert having an interior bore for receiving the fluid distribution insert, an axial fluid mixing orifice communicating with the axial fluid feeding orifice of the fluid distribution insert, and a radially outer set of circumferentially disposed air swirling vanes on an inwardly tapered exterior surface thereof;
and
e) a fluid metering insert axially disposed within the impact chamber of the fluid distribution insert, the fluid metering insert having a metering orifice providing fluid communication between the impact chamber of the fluid distribution insert and the axial fluid inlet passage of the fluid inlet fitting, wherein the metering orifice of the fluid metering insert is offset from the axis of the fluid feeding orifice and has a smaller diameter than the fluid feeding orifice of the fluid distribution insert.

3 more elements

Dependencies are inferred from the claim text.

Description2,732 words

Summary976 words

#1. Field of the Invention

#The subject invention is directed to a nozzle for producing a uniform spray of small fluid droplets using a low pressure supply of air and fluid.

#2. Background of the Related Art

Brief description of the drawings4 figures

#So that those having ordinary skill in the art to which the subject invention pertains will more readily understand how to make and use the low pressure spray nozzle of the subject invention, preferred embodiments thereof will be described in detail hereinbelow with reference to the drawings, wherein:

#FIG. 1 is a perspective view of a low pressure spray nozzle constructed in accordance with a preferred embodiment of the subject invention;

#FIG. 2 is an exploded perspective view of the low pressure spray nozzle of FIG. 1 with parts separated for ease of illustration;

Detailed description1,598 words

#Referring now to the drawings wherein like reference numerals identify similar structural elements of the device disclosed herein, there is illustrated in FIG. 1 a low pressure spray nozzle constructed in accordance with a preferred embodiment of the subject invention and designated generally by reference numeral 10. Spray nozzle 10 is adapted and configured to produce a uniform spray of small fluid droplets using a low pressure supply of air and fluid. The spray nozzle of the subject invention may be employed in a variety of applications including oil burner and gas turbine applications.

#Referring to FIGS. 2 and 6, spray nozzle 10 includes an elongated nozzle body 12 having an axially extending interior chamber 14 of tubular configuration and defining a longitudinal axis. The interior chamber 14 of nozzle body 12 opens into an outwardly tapered exit orifice 13 formed at the distal end of nozzle body 12. Nozzle body 12 has at least two radial air inlet ports 16a, 16b that communicate with interior chamber 14. The air inlet ports 16a, 16b are preferably diametrically opposed from one another, but in instances in which there are three or more air inlet ports provided on the nozzle body, the ports would be equally spaced about the periphery of the nozzle body. The air inlet ports 16a, 16b of nozzle body 12 communicate with corresponding air supply conduits 15a, 15b as shown in FIG. 1, which could be associated with an air supply manifold for delivering pressurized air to the nozzle.

#A fluid inlet fitting 18 is axially disposed within the interior chamber 14 of the nozzle body 12. Fluid inlet fitting 18 has a proximal body portion 18a and a tubular extension 18b which depends from the body portion 18a. The proximal body portion 18a of fluid inlet fitting 18 has a threaded portion 18c which cooperates with a corresponding threaded surface 14a formed within the interior chamber 14 of nozzle body 12. The threaded engagement of the fluid inlet fitting 18 and the nozzle body 12 facilitates the ready removal of the fluid inlet fitting 18 from the nozzle body 12 to perform routine maintenance on the nozzle assembly. An axially extending fluid inlet passage 20 extends through tubular extension 18b from a proximal fluid inlet port 17. The fluid inlet port 17 of fluid inlet fitting 18 communicates with a fluid supply conduit 15c for delivering pressurized fluid to the nozzle, as shown in FIG. 1.

Facts

Application

10/459,226Filed 11 Jun 2003

Priority

20 Sep 2001

Published

23 Oct 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B05B 7/10
Spray pistols; Apparatus for discharge: producing a swirling discharge
B05B 7/0475
With one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber: with means for deflecting the peripheral…
B05B 7/12
Spray pistols; Apparatus for discharge: designed to control volume of flow, e.g. with adjustable passages
F23D 11/107
Medium and fuel meeting at the burner outlet: at least one of both being subjected to a swirling motion

Family

Application60/323,687Us provisional application · filed 20 Sep 2001

Application10/247,207Continuation · filed 19 Sep 2002

Application10/459,226Continuation · filed 11 Jun 2003

US 2003/0052197 A1Published application

US 6,578,777 B2Related patent

US 6,729,562 B2Related patent

US 2003/0197073 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

20 Sep 2001Priority claimedParent application 60/323,687
11 Jun 2003Application filedUS 10/459,226
23 Oct 2003PublishedUS 2003/0052197 A1
23 Jun 2021Assigned to Delavan Incassignment of assignor's interest
17 Dec 2021Assigned to Delavan Spray, LLCassignment of assignor's interest

Low pressure spray nozzle

Life of this patent

Low pressure spray nozzle

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims23

Description2,732 words

Drawings

Classification6 codes

Life of this patent

Description2,732 words