US4630774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam generating nozzle
Assignee: Nordson Corp
•
Filing: 1985-08-22
•
Granted: 1986-12-23
•
Expires: 2005-08-22
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 15:51
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; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
The method of forming a liquid/gas solution into a foam, the gas being maintained in solution in the liquid, comprising: conveying the liquid/gas solution into a foaming chamber formed in a nozzle assembly; impacting the liquid/gas solution against an obstruction within the foaming chamber to agitate the liquid/gas solution; maintaining while the liquid/gas solution is conveyed into the foaming chamber a pressure in the foaming chamber which is greater than atmospheric but less than the pressure required to maintain all of the gas in solution in the liquid, at least a portion of the gas evolving from solution within the foaming chamber and becoming entrapped in the surrounding liquid to form a foam.
Claim 2
Independent Claim
113 words
The method of forming a liquid/gas solution into a foam, the gas being maintained in solution in the liquid, comprising: conveying the liquid/gas solution into a foaming chamber formed in a nozzle assembly; impacting the liquid/gas solution against an obstruction within the foaming chamber to agitate the liquid/gas solution; maintaining while the liquid/gas solution is conveyed into the foaming chamber a pressure in the foaming chamber which is greater than atmospheric but less than the pressure required to maintain all of the gas in solution in the liquid, at least a portion of the gas evolving from solution within the foaming chamber and becoming entrapped in the surrounding liquid to form a foam.
Claim 3
Dependent Claim
31 words
The method of claim 1 in which said step of impacting the liquid/gas solution includes directing the liquid/gas solution against a wall of the foaming chamber to agitate the liquid/gas solution.
Claim 4
Dependent Claim
34 words
The method of claim 1 in which said step of impacting the liquid/gas solution includes directing the liquid/gas solution against an angled surface fixedly mounted within the foaming chamber to agitate the liquid/gas solution.
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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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |