US3590318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating apparatus producing a flat powder spray
Assignee: Ransburg Corp
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Filing: 1969-12-08
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Granted: 1971-06-29
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Expires: 1989-12-08
Abstract
Abstract A nozzle for a powder spray gun having an elongated orifice from which a gas suspension of the powder is discharged in a flat, fanlike spray. The nozzle includes means adjacent the orifice inside the nozzle to force convergence of the suspension at the orifice and means in the flow of the suspension rearwardly from orifice cooperating with the means forcing convergence of the suspension to promote uniformity of powder distribution in the spray. The powder spray gun may include a suitable electrode adapted for connection to a high-voltage source to charge and promote the deposition of the powder particles in the spray.
Inventors
- 👤 Richard O Probst
- 👤 David D Harrold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032; B05B1/00; B05B1/02; B05B1/04; B05B1/048
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
83 words
In a powder-coating apparatus having a spray-discharging nozzle provided with an elongated outlet orifice, a supply passage leading to such orifice, and means for delivering to such passage a gaseous suspension of powder to be discharged from the orifice as a fanlike spray; means for controlling the lateral distribution of powder within the spray, said means including a pin extending across said passage transversely to the flow therein in a position substantially coplanar with said orifice and spaced a short distance rearwardly therefrom.
Claim 2
Dependent Claim
83 words
In a powder-coating apparatus having a spray-discharging nozzle provided with an elongated outlet orifice, a supply passage leading to such orifice, and means for delivering to such passage a gaseous suspension of powder to be discharged from the orifice as a fanlike spray; means for controlling the lateral distribution of powder within the spray, said means including a pin extending across said passage transversely to the flow therein in a position substantially coplanar with said orifice and spaced a short distance rearwardly therefrom.
Claim 3
Dependent Claim
23 words
Powder-coating apparatus as set forth in claim 1 wherein said orifice is of a generally lenticular shape as viewed axially of said passage.
Claim 4
Dependent Claim
42 words
Powder-coating apparatus as set forth in claim 2 wherein said orifice is defined by the intersection of a generally hemispherical surface at the end of the passage with a groove of V-shaped cross section extending across the front face of the nozzle.
Claim 5
Dependent Claim
30 words
Powder-coating apparatus as set forth in claim 2 wherein said orifice has a maximum width approximately one-sixth its length and said pin has a diameter greater than the maximum orifice-width.
Claim 6
Dependent Claim
19 words
Powder-coating apparatus as set forth in claim 2 wherein said orifice has a maximum width approximately one-sixth its length.
Claim 7
Dependent Claim
26 words
Powder-coating apparatus as set forth in claim 1 wherein said pin is of circular cross section and of uniform diameter throughout the diameter of said passage.
Claim 8
Dependent Claim
16 words
Powder-coating apparatus as set forth in claim 1 wherein said pin is of circular cross section.
Claim 9
Dependent Claim
34 words
Powder-coating apparatus as set forth in claim 1 wherein the nozzle is formed of electrically insulating material and provided with a discharge electrode surrounding said orifice and connected to a source of high voltage.
Claim 10
Dependent Claim
39 words
Powder-coating apparatus as set forth in claim 8 wherein the discharge electrode is the forward edge of a semiconductive coating applied to the sides of the nozzle, said coating being connected to the high-voltage source through a substantial resistance.
Claim 11
Dependent Claim
27 words
Powder-coating apparatus as set forth in claim 8 with the addition of an annular auxiliary electrode which is of larger diameter than the nozzle and surrounds it.
Claim 12
Dependent Claim
25 words
Powder-coating apparatus as set forth in claim 8 with the addition of a thin, platelike auxiliary electrode located in said orifice and projecting forwardly therefrom.
Claim 13
Dependent Claim
91 words
A spray discharging nozzle for discharging a suspension of coating material particles in a gaseous medium provided with an elongated outlet orifice, said orifice being formed at the intersection of a bore having converging walls inside of the nozzle and a notch on the outside of the nozzle, and means within the bore spaced rearwardly from the orifice for controlling the lateral distribution of the powder discharged from the nozzle, said means having a surface extending transversely of the bore to intercept and deflect laterally a portion of the flowing suspension.
Claim 14
Dependent Claim
91 words
A spray discharging nozzle for discharging a suspension of coating material particles in a gaseous medium provided with an elongated outlet orifice, said orifice being formed at the intersection of a bore having converging walls inside of the nozzle and a notch on the outside of the nozzle, and means within the bore spaced rearwardly from the orifice for controlling the lateral distribution of the powder discharged from the nozzle, said means having a surface extending transversely of the bore to intercept and deflect laterally a portion of the flowing suspension.
Claim 15
Dependent Claim
30 words
A nozzle as set forth in claim 12 wherein the converging walls of the interior bore are spherical at the front of the bore and said outside notch is V-shaped.
Claim 16
Dependent Claim
40 words
A nozzle as set forth in claim 12 wherein said means for controlling the lateral distribution of the powder discharged from the nozzle is a pin extending transversely of the bore and spaced a short distance rearwardly from the orifice.
Claim 17
Dependent Claim
87 words
In a powder spraying apparatus, an elongated conduit for delivering a suspension of powder in a gaseous medium, a nozzle having an elongated outlet orifice at the end of said conduit, said nozzle including means adjacent the orifice inside of the nozzle to force a convergence of powder and gaseous medium at the orifice, and means in the flow of the suspension and spaced a short distance rearwardly from tHe orifice cooperating with said other means to control the lateral distribution of powder discharged from the nozzle.
Claim 18
Dependent Claim
87 words
In a powder spraying apparatus, an elongated conduit for delivering a suspension of powder in a gaseous medium, a nozzle having an elongated outlet orifice at the end of said conduit, said nozzle including means adjacent the orifice inside of the nozzle to force a convergence of powder and gaseous medium at the orifice, and means in the flow of the suspension and spaced a short distance rearwardly from tHe orifice cooperating with said other means to control the lateral distribution of powder discharged from the nozzle.
Claim 19
Dependent Claim
125 words
In a powder spraying apparatus, a nozzle for spraying powder suspended in a gaseous medium, the nozzle comprising, a body, a passage in the body adapted to be connected to means for delivering the powder suspended in the gaseous medium to the passage, the passage terminating in a forward end surface to force a convergence of the powder and the gaseous medium, an outlet orifice in the body communicating with the passage, the outlet orifice providing an opening adapted to emit the powder and the gaseous medium, and means in the passage assisting in the distribution of the powder within the gaseous medium whereby the spray emitted through the outlet orifice includes a relatively wide central portion wherein the distribution of powder is reasonably uniform.
Claim 20
Dependent Claim
125 words
In a powder spraying apparatus, a nozzle for spraying powder suspended in a gaseous medium, the nozzle comprising, a body, a passage in the body adapted to be connected to means for delivering the powder suspended in the gaseous medium to the passage, the passage terminating in a forward end surface to force a convergence of the powder and the gaseous medium, an outlet orifice in the body communicating with the passage, the outlet orifice providing an opening adapted to emit the powder and the gaseous medium, and means in the passage assisting in the distribution of the powder within the gaseous medium whereby the spray emitted through the outlet orifice includes a relatively wide central portion wherein the distribution of powder is reasonably uniform.
Claim 21
Dependent Claim
93 words
A powder spraying nozzle comprising a body having an elongated orifice at the front of the body and interior walls defining a passageway therethrough for transmitting a flowing suspension of powder in gas to the orifice, means spaced rearwardly of the orifice and acting within the body to deflect the flowing suspension, the walls within said passageway converging forwardly of said means and adjacent the elongated orifice and cooperating with said means to project the deflected flowing suspension through the elongated orifice as an expanding fan-shaped powder spray with a uniform powder distribution.
Claim 22
Dependent Claim
93 words
A powder spraying nozzle comprising a body having an elongated orifice at the front of the body and interior walls defining a passageway therethrough for transmitting a flowing suspension of powder in gas to the orifice, means spaced rearwardly of the orifice and acting within the body to deflect the flowing suspension, the walls within said passageway converging forwardly of said means and adjacent the elongated orifice and cooperating with said means to project the deflected flowing suspension through the elongated orifice as an expanding fan-shaped powder spray with a uniform powder distribution.
Claim 23
Dependent Claim
113 words
A powder nozzle to spray a flowing suspension of powder and gas as an expanding fanlike spray with uniform powder distribution comprising a body having interior walls defining a passageway for the flowing suspension and an elongated orifice in the forward portion of the body adjacent the forward portion of the passageway to emit the spray, the walls of the passageway having a converging portion adjacent the elongated orifice, and means spaced rearwardly of the orifice and a converging portion of the passageway and acting within the passageway to deflect the flowing suspension and in cooperation with the converging portion of the walls to distribute the powder uniformly within the expanding fanlike spray.
Claim 24
Dependent Claim
113 words
A powder nozzle to spray a flowing suspension of powder and gas as an expanding fanlike spray with uniform powder distribution comprising a body having interior walls defining a passageway for the flowing suspension and an elongated orifice in the forward portion of the body adjacent the forward portion of the passageway to emit the spray, the walls of the passageway having a converging portion adjacent the elongated orifice, and means spaced rearwardly of the orifice and a converging portion of the passageway and acting within the passageway to deflect the flowing suspension and in cooperation with the converging portion of the walls to distribute the powder uniformly within the expanding fanlike spray.
Claim 25
Dependent Claim
102 words
A spray nozzle adapted to be connected to a gaseous suspension of powder, the spray nozzle comprising an elongated opening, a passage leading to the opening and adapted to be connected to the gaseous suspension of powder, the gaseous suspension of powder to be discharged from the opening as a fanlike spray, means in the form of a surface in the passage and spaced a short distance from the opening and extending into the passage to intercept and deflect a portion of the gaseous suspension of powder and cooperating with the opening to control the distribution of the powder in the spray.
Claim 26
Dependent Claim
102 words
A spray nozzle adapted to be connected to a gaseous suspension of powder, the spray nozzle comprising an elongated opening, a passage leading to the opening and adapted to be connected to the gaseous suspension of powder, the gaseous suspension of powder to be discharged from the opening as a fanlike spray, means in the form of a surface in the passage and spaced a short distance from the opening and extending into the passage to intercept and deflect a portion of the gaseous suspension of powder and cooperating with the opening to control the distribution of the powder in the spray.
Claim 27
Dependent Claim
19 words
The spray nozzle of claim 19, wherein the surface is substantially coplanar with the longest dimension of the opening.
Claim 28
Dependent Claim
14 words
The spray nozzle of claim 20, wherein the surface is part of a pin.
Claim 29
Dependent Claim
101 words
A spray discharging nozzle for discharging a suspension of coating material particles in a gaseous medium provided with an elongated orifice, said orifice being formed at the intersection of a bore having converging walls inside of the nozzle and a notch on the outside of the nozzle, a pin extending transversely of the bore and spaced a short distance rearwardly from the orifice to intercept and effect laterally a portion of the flowing suspension, the pin being substantially parallel to the length dimension of the orifice and with the orifice controlling the lateral distribution of the powder discharged from the nozzle.
Claim 30
Dependent Claim
101 words
A spray discharging nozzle for discharging a suspension of coating material particles in a gaseous medium provided with an elongated orifice, said orifice being formed at the intersection of a bore having converging walls inside of the nozzle and a notch on the outside of the nozzle, a pin extending transversely of the bore and spaced a short distance rearwardly from the orifice to intercept and effect laterally a portion of the flowing suspension, the pin being substantially parallel to the length dimension of the orifice and with the orifice controlling the lateral distribution of the powder discharged from the nozzle.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |