US4553701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam generating nozzle
Assignee: Nordson Corp
•
Filing: 1982-10-22
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Granted: 1985-11-19
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Expires: 2002-10-22
Abstract
Abstract A foam generating nozzle is provided for converting a liquid containing a gas maintained under pressure in solution in the liquid, to a foam for application to a substrate. Complete foaming of the solution is accomplished prior to discharge from the nozzle. This assures in some applications complete atomization before contact with the substance to be coated.
Inventors
- 👤 William R. Rehman
- 👤 James C. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/08; B05B7/0807; B05B7/0815; B29; B29B; B29B7/00; B29B7/74; B29B7/7438; B29B7/7452
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
A nozzle assembly for converting a liquid/gas solution into a foam, the gas being maintained under pressure in solution in the liquid, said nozzle assembly comprising: chamber means including an obstruction for receiving the liquid/gas solution and causing the gas to leave solution and form a foam, said chamber means having a pressure lower than that required to maintain the gas in solution in the liquid; a discharge orifice communicating with said chamber means; delivery means including an inlet passageway communicating with said chamber means for directing the liquid/gas solution to said chamber means while maintaining the gas in solution; said inlet passageway directing the liquid/gas solution into said chamber means and into engagement with said obstruction to agitate the liquid/gas solution, the agitation of the liquid/gas solution within said chamber means inducing the gas to leave solution and form a foam within said chamber means, said foam thereafter being emitted from said chamber means through said discharge orifice.
Claim 2
Dependent Claim
159 words
A nozzle assembly for converting a liquid/gas solution into a foam, the gas being maintained under pressure in solution in the liquid, said nozzle assembly comprising: chamber means including an obstruction for receiving the liquid/gas solution and causing the gas to leave solution and form a foam, said chamber means having a pressure lower than that required to maintain the gas in solution in the liquid; a discharge orifice communicating with said chamber means; delivery means including an inlet passageway communicating with said chamber means for directing the liquid/gas solution to said chamber means while maintaining the gas in solution; said inlet passageway directing the liquid/gas solution into said chamber means and into engagement with said obstruction to agitate the liquid/gas solution, the agitation of the liquid/gas solution within said chamber means inducing the gas to leave solution and form a foam within said chamber means, said foam thereafter being emitted from said chamber means through said discharge orifice.
Claim 3
Dependent Claim
18 words
The nozzle assembly of claim 1 further including means for atomizing said foam emitted from said discharge orifice.
Claim 4
Dependent Claim
29 words
The nozzle assembly of claim 1 in which the cross-sectional area of said discharge orifice is at least five times greater than the cross-sectional area of said inlet passageway.
Claim 5
Dependent Claim
40 words
The nozzle assembly of claim 1 further including a plug having a longitudinal axis, said inlet passageway being formed in said plug at an acute angle in the range of about 20°-40° relative to said longitudinal axis of the plug.
Claim 6
Dependent Claim
43 words
The nozzle assembly of claim 1 in which said chamber means includes an inner wall, said inlet passageway delivering the liquid/gas solution under pressure into engagement with said inner chamber wall, said inner chamber wall forming said obstruction to agitate the liquid/gas solution.
Claim 7
Dependent Claim
37 words
The apparatus of claim 1 wherein said obstruction is a wire means disposed within said chamber means in the path of said liquid/gas solution so that said liquid/gas solution contacts said wire means at an acute angle.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1 wherein said acute angle is in the range of about 20°-40° .
Claim 9
Dependent Claim
37 words
The apparatus of claim 1 wherein said obstruction is a sphere means disposed within said chamber means in the path of said liquid/gas solution so that said liquid/gas solution contacts said sphere means at an acute angle.
Claim 10
Dependent Claim
17 words
The apparatus of claim 8 wherein said acute angle is in the range of about 20°-40° .
References Cited (Backward Citations)
US576762A
Cited
US587344A
Cited
US604873A
Cited
US614883A
Cited
US617472A
Cited
US986201A
Cited
US1178905A
Cited
US1886623A
Cited
US2161111A
Cited
US2164411A
Cited
US2231782A
Cited
US2624622A
Cited
US2760821A
Cited
US2764452A
Cited
US2955764A
Cited
US3051397A
Cited
US3446285A
Cited
US3547200A
Cited
US3633795A
Cited
US3625436A
Cited
US3797747A
Cited
US3784111A
Cited
US3739989A
Cited
US3836076A
Cited
US3814329A
Cited
US3946947A
Cited
US4103876A
Cited
US3961754A
Cited
US4071195A
Cited
US4141507A
Cited
US4059714A
Cited
US4247581A
Cited
DE7924574U1
Cited
US4330086A
Cited
GB2081606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |