US3754710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle tip of a spray gun of the airless type
Assignee: INOUYE SHOKAI AND CO Ltd KK
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Filing: 1972-07-27
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Granted: 1973-08-28
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Expires: 1992-07-27
Abstract
Abstract A nozzle tip of a spray gun of the airless type in which a slot is formed at a forward end of the nozzle tip which slot has a bottom at which a nozzle orifice opens and two opposite walls disposed parallel to each other and along the major axis of the nozzle orifice, each wall having an inner surface inclined outwardly in going from bottom to top so that the slot is trapezoidal in cross-sectional shape. The nozzle orifice at its edge is substantially in the form of a rectangle with four sides thereof being slightly curved outwardly, and a connecting portion between the nozzle orifice and a passage for the paint inside the gun is elliptically curved, the degree of elliptic curving varying depending on the specific gravity and viscosity of the paint used. The nozzle tip shaped and configured as aforementioned represents an improvement in conventional nozzle tips of the type described, permitting the production of a tail or a maximum thickness portion near each of opposite end portions of the pattern of a coat of paint applied by a conventional nozzle tip to be avoided.
Inventors
- 👤 K Chimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/042
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A nozzle tip of a spray gun of the airless type in which a slot is formed at a forward end of the nozzle tip which slot has a bottom at which a nozzle orifice opens and two opposite walls disposed parallel to each other and along the major axis of the nozzle orifice, each of said two opposite walls having an inner surface inclined outwardly in going from bottom to top so that the slot is trapezoidal in cross-sectional shape, said nozzle orifice at its edge being substantially in the form of a rectangle with four sides thereof being slightly curved outwardly, and a connecting portion between the nozzle orifice and a passageway for the paint which is elliptically curved, the degree of elliptic curving of said connecting portion being variable depending on the specific gravity and the viscosity of the paint used so as to thereby permit the paint to be ejected through the nozzle orifice in a uniform distribution.
Claim 2
Dependent Claim
162 words
A nozzle tip of a spray gun of the airless type in which a slot is formed at a forward end of the nozzle tip which slot has a bottom at which a nozzle orifice opens and two opposite walls disposed parallel to each other and along the major axis of the nozzle orifice, each of said two opposite walls having an inner surface inclined outwardly in going from bottom to top so that the slot is trapezoidal in cross-sectional shape, said nozzle orifice at its edge being substantially in the form of a rectangle with four sides thereof being slightly curved outwardly, and a connecting portion between the nozzle orifice and a passageway for the paint which is elliptically curved, the degree of elliptic curving of said connecting portion being variable depending on the specific gravity and the viscosity of the paint used so as to thereby permit the paint to be ejected through the nozzle orifice in a uniform distribution.
Claim 3
Dependent Claim
23 words
A nozzle tip as set forth in claim 1 wherein the angle of said slot is in a range from 14* to 65*.
Claim 4
Dependent Claim
37 words
A nozzle tip as defined in claim 1 wherein said arcuate connecting portion has a height such that the stream of paint moving along the wall of the arcuate connecting portion suddenly changes its direction of movement.
Claim 5
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 35* when the specific gravity of the paint in slurry form is over 3.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is over 1,000.
Claim 6
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 45* when the specific gravity of the paint in slurry form is over 3.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is below 1,000.
Claim 7
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 45* when the specific gravity of the paint in slurry form is over 2.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is over 1,500.
Claim 8
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 60* when the specific gravity of the paint in slurry form is over 2.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is below 1,500.
Claim 9
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 45* when the specific gravity of the paint in slurry form is below 2.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is over 3,000.
Claim 10
Dependent Claim
65 words
A nozzle tip of a spray gun as set forth in claim 1 wherein the degree of elliptic curving of the connecting portion between the nozzle tip and the passageway for the paint is 60* when the specific gravity of the paint in slurry form is below 2.0 and the product of the specific gravity and the viscosity (centipoise) of the paint is below 3,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |