Patent US4239157A successfully refreshed from Google Patents.
US4239157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure spray gun
Assignee: Atlas Copco AB
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Filing: 1979-03-26
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Granted: 1980-12-16
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Expires: 1999-03-26
Abstract
Abstract A high pressure spray gun for airless atomization of spray material comprising a safety head mounted on the spray nozzle. The safety head is formed with two parallel protector studs comprising two opposed ridges located transversely to the spray direction and forming a transverse gap through which the spray material has to pass. The ridges are each defined by one flat forwardly inclined surface on each stud and by a common cylindrical surface which forms a transverse part-cylindrical chamber in the safety head. The ridges are formed with opposed edges and prevent spray material from setting on the projector studs.
Inventors
- 👤 Anders G. Fasth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:49
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/01; B05B15/00; B05B15/14; B05B15/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
231 words
In an airless high pressure spray gun, comprising: a gun body (10); a spray material valve (11) disposed in the gun body; a spray forming nozzle (12) having a geometric axis (31); and a safety head (14) coupled to said nozzle (12) and including two protector studs (29, 30) extending in the spraying direction from the nozzle (12), said protector studs extending respectively on each side of the geometric axis (31) of the nozzle (12), each of said protector studs comprising a transverse ridge (34) which is spaced transversely from said geometric axis (31) and which is axially spaced from the nozzle (12) in the spraying direction, said ridge being disposed out of reach of the spray jet formed by the nozzle and said ridge being arranged in an opposed relationship to an identical ridge (35) of the other of said protector studs to form a gap between the ridges (34,35); said protector studs (29, 30), between said ridges (34, 35) and the spray forming nozzle (12), together forming an open ended part-cylindrical chamber (41) the geometric axis of which is substantially perpendicular to the geometric axis (31) of the spray forming nozzle (12), said part-cylindrical chamber (41) extending to the vicinity of the spray opening of said nozzle (12) and said part-cylindrical chamber (41) having a diameter which exceeds the width of said gap between said opposed ridges (34, 35).
Claim 2
Dependent Claim
231 words
In an airless high pressure spray gun, comprising: a gun body (10); a spray material valve (11) disposed in the gun body; a spray forming nozzle (12) having a geometric axis (31); and a safety head (14) coupled to said nozzle (12) and including two protector studs (29, 30) extending in the spraying direction from the nozzle (12), said protector studs extending respectively on each side of the geometric axis (31) of the nozzle (12), each of said protector studs comprising a transverse ridge (34) which is spaced transversely from said geometric axis (31) and which is axially spaced from the nozzle (12) in the spraying direction, said ridge being disposed out of reach of the spray jet formed by the nozzle and said ridge being arranged in an opposed relationship to an identical ridge (35) of the other of said protector studs to form a gap between the ridges (34,35); said protector studs (29, 30), between said ridges (34, 35) and the spray forming nozzle (12), together forming an open ended part-cylindrical chamber (41) the geometric axis of which is substantially perpendicular to the geometric axis (31) of the spray forming nozzle (12), said part-cylindrical chamber (41) extending to the vicinity of the spray opening of said nozzle (12) and said part-cylindrical chamber (41) having a diameter which exceeds the width of said gap between said opposed ridges (34, 35).
Claim 3
Dependent Claim
49 words
Spray gun according to claim 1, wherein each of said ridges (34, 35) is defined by two inclined surfaces (38, 39) meeting at an edge (36) at the top of the ridge (34), one of said inclined surfaces (38) being a cylindrical surface portion of said part-cylindrical chamber (41).
Claim 4
Dependent Claim
35 words
Spray gun according to claim 2, wherein said two inclined surfaces (38, 39) adjacent said edge (36) are inclined relative to the geometric axis (31) of the spray forming nozzle (12) by equal angles (α).
Claim 5
Dependent Claim
36 words
Spray gun according to any one of claims 2 or 3, wherein said oppositely disposed ridges (34, 35) define a transverse gap through which the spray emitted from the spray forming nozzle (12) has to pass.
References Cited (Backward Citations)
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |