US4386739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle for hydrostatic fluid tip
Assignee: Graco Inc
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Filing: 1981-12-18
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Granted: 1983-06-07
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Expires: 2001-12-18
Abstract
Abstract A nozzle for utilization on a spray gun operated for the spraying of pressurized liquids through an elliptical orifice, wherein pressurized air is utilized in conjunction with the invention to enable an improved quality spray at a lower liquid pressure. The nozzle has a pair of air jets on either side of the elliptical orifice, positioned in diametrically opposite equidistant locations, and respectively directed along axes which cause the air jet envelope to tangentially contact the orifice at a point outside the included angle formed by the fan-shaped spray pattern emitted from the orifice.
Inventors
- 👤 Kui C. Kwok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:17
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/08; B05B7/0807; B05B7/0815
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
In a spray gun of the type where pressurized liquid is forced through a generally elliptical orifice in a spray tip to achieve atomization of the liquid, and compressed air is selectively directed against the sprayed liquid through selectively placed air jets in an atomizing nozzle, the improvement in atomizing nozzle construction comprising: (a) a pair of projecting horns on said atomizing nozzle, said horns extending forwardly of said orifice and each horn having therein an air passage for receiving compressed air; and (b) a pair of air jets in each of said horns, in flow communication with said air passage and opening toward said elliptical orifice, each of said air jets being aligned along an axis which is normal to the major axis of said elliptical orifice, the axis of each of said pair of air jets being in alignment with the axis of an oppositely facing air jet and passing in proximate tangential relationship to said spray tip.
Claim 2
Dependent Claim
160 words
In a spray gun of the type where pressurized liquid is forced through a generally elliptical orifice in a spray tip to achieve atomization of the liquid, and compressed air is selectively directed against the sprayed liquid through selectively placed air jets in an atomizing nozzle, the improvement in atomizing nozzle construction comprising: (a) a pair of projecting horns on said atomizing nozzle, said horns extending forwardly of said orifice and each horn having therein an air passage for receiving compressed air; and (b) a pair of air jets in each of said horns, in flow communication with said air passage and opening toward said elliptical orifice, each of said air jets being aligned along an axis which is normal to the major axis of said elliptical orifice, the axis of each of said pair of air jets being in alignment with the axis of an oppositely facing air jet and passing in proximate tangential relationship to said spray tip.
Claim 3
Dependent Claim
30 words
The improvement of claim 1, wherein said respective horns are spaced equidistant from said elliptical orifice along a line which is normal to the major axis of said elliptical orifice.
Claim 4
Dependent Claim
44 words
The improvement of claim 2, wherein each of said air jets has the same predetermined diameter and the axis of said air jets is positioned so that a cylindrical extension of said air jets of said predetermined diameter will tangentially contact said spray tip.
Claim 5
Dependent Claim
24 words
The improvement of claim 3, wherein said air jets are directed outside the included angle of pressurized liquid forced through said spray tip orifice.
Claim 6
Dependent Claim
35 words
The improvement of claim 4, wherein said oppositely facing air jets are positioned to direct pressurized air into disturbance relationship to the flow of the edges of pressurized liquid forced through said spray tip orifice.
References Cited (Backward Citations)
US4055300A
Cited
US4232824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |