Patent US3556411A successfully refreshed from Google Patents.
US3556411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray nozzle
Assignee: Nordson Corp
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Filing: 1968-05-22
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Granted: 1971-01-19
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Expires: 1988-05-22
Abstract
Abstract Improvements in spray nozzles suitable for hydraulic airless spraying in flat fan patterns, including spraying viscous liquids such as paint, are disclosed herein. Such an improved spray nozzle comprises a known V-cut discharge orifice in a known hemispherical or hemispheroidal impingement dome at the downstream end of a central longitudinal approach passage. It also comprises novel means at or near the upstream end of the passage in novel coaction with the downstream parts of the nozzle for giving a turbulence and/or beneficient quality to the fluid stream as it enters said dome and/or enters and flows through and/or beyond said discharge orifice. It is also disclosed that this nozzle gives an improved spray pattern with better atomization and distribution in relation to the viscosity of the fluid being sprayed and the fluid pressure drop across the nozzle. The improvements disclosed herein may also be incorporated advantageously in nozzles such as in the Brooks U.S. Pat. No. 3,366,337, for mixing and spraying two or more different constitutents of a multicomponent material system. In this improved spray nozzle, the upstream end of said passage is closed against the entry of fluid moving in the direction of the longitudinal axis of the passage, and the nozzle is free of prior art metering jets, preorifices and restrictors which tended so to move the fluid. Fluid is required to enter the upstream end of the passage transversely of said axis, and change direction abruptly with vigorous agitation in a zone or chamber of turbulence and agitation at an appreciable distance from the downstream outlet orifice. The initial agitation produces, or results in the beneficiently turbulent stream and effect mentioned above. It is also disclosed that one form of this improved nozzle is conveniently made in two parts and comprises a removable end closure part, sometimes herein called a turbulence plate, coacting with the upstream end of the said passage, which passage, with said dome and orifice, is incorporated in the other, i.e. body or ''''tip,'''' part of the nozzle. The nozzle can be caused to revert to substantially prior conventional form and function upon removal of the turbulence plate from its coacting relation to and with the said tip or body portion of the nozzle.
Inventors
- 👤 Eric T Nord
- 👤 Alvin A Rood
- 👤 Frederic M Bosworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/046; B05B1/042; B05B1/048; B05B1/34
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
202 words
In a liquid spray nozzle having flow capacity of not more than about 20 gallons of water per hour at 500 p.s.i., comprising a body having a central void, comprising at least in part an approach passage, with a longitudinal axis and a fan spray outlet orifice at one end of said passage and with a side inlet at the other end of said passage and with an imperforate sidewall from said one end to said inlet, the area of said inlet being harmoniously related to the effective area of said outlet in respect to turbulent flow therebetween, the improvement comprising means for preventing the longitudinal inflow of liquid to the inlet end of said passage and defining a turbulence chamber in said void adjacent said inlet, and liquid inlet conducting means for introducing liquid into said chamber transversely of said axis with velocity and direction tending to induce turbulence in said chamber and avoid substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice; both said means and said passage coacting to create a turbulent stream in said passage with substantially uniform mean velocity across the whole stream at said one end of said passage.
Claim 2
Dependent Claim
202 words
In a liquid spray nozzle having flow capacity of not more than about 20 gallons of water per hour at 500 p.s.i., comprising a body having a central void, comprising at least in part an approach passage, with a longitudinal axis and a fan spray outlet orifice at one end of said passage and with a side inlet at the other end of said passage and with an imperforate sidewall from said one end to said inlet, the area of said inlet being harmoniously related to the effective area of said outlet in respect to turbulent flow therebetween, the improvement comprising means for preventing the longitudinal inflow of liquid to the inlet end of said passage and defining a turbulence chamber in said void adjacent said inlet, and liquid inlet conducting means for introducing liquid into said chamber transversely of said axis with velocity and direction tending to induce turbulence in said chamber and avoid substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice; both said means and said passage coacting to create a turbulent stream in said passage with substantially uniform mean velocity across the whole stream at said one end of said passage.
Claim 3
Dependent Claim
34 words
The nozzle of claim 1 wherein the cross-sectional area of said inlet condUcting means is substantially equal to the equivalent circular area of said discharge orifice, plus about 20 percent, minus about 30 percent.
Claim 4
Dependent Claim
50 words
The improvement of claim 2 wherein said central passage is between 4 to 10 times as long as its diameter adjacent said orifice and has a tendency to convert the turbulence in said chamber to a stream of substantially uniform axial velocity throughout its whole cross section adjacent said orifice.
Claim 5
Dependent Claim
142 words
In a spray nozzle comprising a body having a central passage with a longitudinal axis and a fan spray orifice at one end of said passage, the improvement comprising means for preventing the longitudinal inflow of fluid to the opposite end of said passage and defining a turbulence chamber in said passage at said opposite end, and fluid inlet conducting means for introducing fluid into said chamber transversely of said axis with motion and direction tending to induce turbulence in said chamber and prevent substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice, said central passage being open at said opposite end of said body, and said first named means comprising a turbulence plate movable toward and away from the said opposite end of said body and comprising in coaction therewith said inlet conducting means.
Claim 6
Dependent Claim
142 words
In a spray nozzle comprising a body having a central passage with a longitudinal axis and a fan spray orifice at one end of said passage, the improvement comprising means for preventing the longitudinal inflow of fluid to the opposite end of said passage and defining a turbulence chamber in said passage at said opposite end, and fluid inlet conducting means for introducing fluid into said chamber transversely of said axis with motion and direction tending to induce turbulence in said chamber and prevent substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice, said central passage being open at said opposite end of said body, and said first named means comprising a turbulence plate movable toward and away from the said opposite end of said body and comprising in coaction therewith said inlet conducting means.
Claim 7
Dependent Claim
42 words
The improvement of claim 4 wherein the said opposite end of said body has a flat face normal to said axis and said turbulence plate is bodily movable in the direction of said axis and has a surface mating with said face.
Claim 8
Dependent Claim
51 words
The improvement of claim 4 wherein said central passage is between 4 to 10 times as long as its diameter adjacent said orifice and has a tendency to convert the turbulence in said chamber to a turbulent stream of substantially uniform axial velocity throughout its whole cross section adjacent said orifice.
Claim 9
Dependent Claim
138 words
In a spray nozzle comprising a body having a central passage with a longitudinal axis and a fan spray orifice at one end of said passage, the improvement comprising means for preventing the longitudinal inflow of fluid to the opposite end of said passage and defining a turbulence chamber in said passage at said opposite end, and fluid inlet conducting means for introducing fluid into said chamber transversely of said axis with motion and direction tending to induce turbulence in said chamber and prevent substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice, said central passage being open at said opposite end of said body, and said first named means comprising a turbulence plate at the said opposite end of said body and comprising in coaction therewith said inlet conducting means.
Claim 10
Dependent Claim
138 words
In a spray nozzle comprising a body having a central passage with a longitudinal axis and a fan spray orifice at one end of said passage, the improvement comprising means for preventing the longitudinal inflow of fluid to the opposite end of said passage and defining a turbulence chamber in said passage at said opposite end, and fluid inlet conducting means for introducing fluid into said chamber transversely of said axis with motion and direction tending to induce turbulence in said chamber and prevent substantial bodily rotation of the fluid stream in said passage about said axis adjacent said orifice, said central passage being open at said opposite end of said body, and said first named means comprising a turbulence plate at the said opposite end of said body and comprising in coaction therewith said inlet conducting means.
Claim 11
Dependent Claim
25 words
The improvement of claim 4 in which said turbulence plate has a recess substantially coextensive with said passage and comprising part of said turbulence chamber.
Claim 12
Dependent Claim
38 words
The improvement of claim 8 in which said recess comprises a wall opposite said passage and normal to said axis and fluid is introduced to said chamber between said recess and the said opposite end of said passage.
Claim 13
Dependent Claim
33 words
The improvement of claim 9 wherein said body at the opposite end of said passage and said turbulence plate have juxtaposed surfaces, one of which is grooved to comprise said inlet conducting means.
Claim 14
Dependent Claim
27 words
The improvement of claim 1 wherein said inlet conducting means comprises only one lateral passage having its axis substantially intersecting the said axis of said central passage.
Claim 15
Dependent Claim
18 words
The improvement of claim 1 wherein said inlet conducting means comprises oppositely disposed and axially aligned lateral passages.
Claim 16
Dependent Claim
22 words
The improvement of claim 1 wherein said inlet conducting means comprises a plurality of paths directing fluid into collision in said chamber.
Claim 17
Dependent Claim
33 words
The improvement of claim 4 wherein said body at the opposite end of said passage and said turbulence plate have juxtaposed surfaces, one of which is grooved to comprise said inlet conducting means.
Claim 18
Dependent Claim
33 words
The improvement of claim 7 wHerein said body at the opposite end of said passage and said turbulence plate have juxtaposed surfaces, one of which is grooved to comprise said inlet conducting means.
Claim 19
Dependent Claim
45 words
The improvement of claim 7 wherein said passage is from about 4 to 10 times as long as its diameter at said one end of said passage and tapers to a greater diameter at said opposite end whereby to accelerate said stream toward said orifice.
Claim 20
Dependent Claim
55 words
The improvement of claim 16 wherein the cross-sectional area of said inlet conducting means is commensurate with the effective area of said orifice and the velocity of fluid being introduced to said turbulence chamber is from about 30 percent more to about 20 percent less than the velocity of fluid being discharged through said orifice.
Claim 21
Dependent Claim
212 words
An hydraulic airless spray nozzle suitable for fine finishing by delivering a finely atomized spray of coating material in a selected pattern upon work to be finished, comprising a nozzle tip having a central passage, including an approach passage, having a longitudinal axis and having a discharge orifice smaller than the approach passage adjacent thereto at one end of both said passages at one end of said nozzle tip, said approach passage having a lateral inlet longitudinal spaced from said orifice sufficiently to enhance the quality of the stream adjacent said orifice and having an imperforate sidewall between said orifice and said inlet, means adjacent the other end of said central passage preventing the inflow of liquid longitudinally to the other end of said approach passage, said central passage comprising a turbulence chamber adjacent said inlet, inlet passage means for conducting liquid into said chamber adjacent a plane substantially normal to said axis, and means for changing the direction of flow of liquid abruptly and turbulently in said chamber and causing said liquid to flow to said orifice in a turbulent stream without substantial bodily rotation and with its constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said passages.
Claim 22
Dependent Claim
212 words
An hydraulic airless spray nozzle suitable for fine finishing by delivering a finely atomized spray of coating material in a selected pattern upon work to be finished, comprising a nozzle tip having a central passage, including an approach passage, having a longitudinal axis and having a discharge orifice smaller than the approach passage adjacent thereto at one end of both said passages at one end of said nozzle tip, said approach passage having a lateral inlet longitudinal spaced from said orifice sufficiently to enhance the quality of the stream adjacent said orifice and having an imperforate sidewall between said orifice and said inlet, means adjacent the other end of said central passage preventing the inflow of liquid longitudinally to the other end of said approach passage, said central passage comprising a turbulence chamber adjacent said inlet, inlet passage means for conducting liquid into said chamber adjacent a plane substantially normal to said axis, and means for changing the direction of flow of liquid abruptly and turbulently in said chamber and causing said liquid to flow to said orifice in a turbulent stream without substantial bodily rotation and with its constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said passages.
Claim 23
Dependent Claim
47 words
The nozzle of claim 18 wherein said inlet passage means comprises only one inlet substantially corresponding in area to the equivalent area of said orifice, plus or minus about one-third and has its longitudinal axis substantially perpendicular to and intersection the longitudinal axis of said approach passage.
Claim 24
Dependent Claim
26 words
The nozzle of claim 18 wherein said inlet passage means comprises a plurality of passages aimed to project fluid streams into collision in said turbulence chamber.
Claim 25
Dependent Claim
13 words
The nozzle of claim 20 comprising two passages axially aligned and oppositely disposed.
Claim 26
Dependent Claim
12 words
The nozzle of claim 21 in which said two passages are unequal.
Claim 27
Dependent Claim
163 words
A spray nozzle comprising a central passage having a longitudinal axis, a discharge orifice at one end of said passage at one end of said nozzle, means adjacent the other end of said nozzle preventing the inflow of fluid longitudinally to the other end of said passage, said passage comprising a turbulence chamber adjacent said other end of said nozzle, inlet passage means for conducting fluid into said chamber in a plane substantially normal to said axis, and means for changing the direction of flow of fluid abruptly and turbulently in said chamber and causing said fluid to flow to said orifice in a stream without substantial bodily rotation and with its substantial constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said central passage, said first named means comprising a turbulence plate movable in the direction of said axis toward and away from the said other end of said nozzle.
Claim 28
Dependent Claim
163 words
A spray nozzle comprising a central passage having a longitudinal axis, a discharge orifice at one end of said passage at one end of said nozzle, means adjacent the other end of said nozzle preventing the inflow of fluid longitudinally to the other end of said passage, said passage comprising a turbulence chamber adjacent said other end of said nozzle, inlet passage means for conducting fluid into said chamber in a plane substantially normal to said axis, and means for changing the direction of flow of fluid abruptly and turbulently in said chamber and causing said fluid to flow to said orifice in a stream without substantial bodily rotation and with its substantial constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said central passage, said first named means comprising a turbulence plate movable in the direction of said axis toward and away from the said other end of said nozzle.
Claim 29
Dependent Claim
35 words
The nozzle of claim 23 wherein said turbulence plate and the said other end of said nozzle have mutually juxtaposed plane faces, and said inlet passage means comprises a groove in one of said faces.
Claim 30
Dependent Claim
26 words
The nozzle of claim 24 wherein said turbulence plate includes a recessed cavity in substantial alignment with said central passage and comprises said turbulence chamber therewith.
Claim 31
Dependent Claim
185 words
A spray nozzle comprising a central passage having a longitudinal axis, a discharge orifice at one end of said passage at one end of said nozzle, means adjacent the other end of said nozzle preventing the inflow of fluid longitudinally to the other end of said passage, said passage comprising a turbulence chamber adjacent said other end of said nozzle, inlet passage means for conducting fluid into said chamber in a plane substantially normal to said axis, means for changing the direction of flow of fluid abruptly and turbulently in said chamber and causing said fluid to flow to said orifice in a stream without substantial bodily rotation and with its substantial constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said central passage, the said other end of said nozzle having a surface normal to said axis, a separate turbulence plate comprising said first named means, and means for supporting said turbulence plate closely adjacent said surface and spaced from the upstream end of said passage and comprising said inlet passage means.
Claim 32
Dependent Claim
185 words
A spray nozzle comprising a central passage having a longitudinal axis, a discharge orifice at one end of said passage at one end of said nozzle, means adjacent the other end of said nozzle preventing the inflow of fluid longitudinally to the other end of said passage, said passage comprising a turbulence chamber adjacent said other end of said nozzle, inlet passage means for conducting fluid into said chamber in a plane substantially normal to said axis, means for changing the direction of flow of fluid abruptly and turbulently in said chamber and causing said fluid to flow to said orifice in a stream without substantial bodily rotation and with its substantial constituents moving parallel to said axis with substantial uniform velocity across substantially the whole cross section of said one end of said central passage, the said other end of said nozzle having a surface normal to said axis, a separate turbulence plate comprising said first named means, and means for supporting said turbulence plate closely adjacent said surface and spaced from the upstream end of said passage and comprising said inlet passage means.
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |