US5048549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning and/or fluxing circuit card assemblies
Assignee: Raytheon Co
•
Filing: 1990-08-27
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Granted: 1991-09-17
•
Expires: 2010-08-27
Abstract
Abstract Apparatus and a process are disclosed for cleaning and/or fluxing circuit card assemblies. The assemblies are moved through an enclosure in which they are sprayed with cleaning and/or fluxing liquid from fenestrated cylinders rotating above and below the path of the assemblies and disposed laterally thereacross. The complex spray impact pattern created by the simultaneous movements of the assemblies and the cylinders effects thorough cleaning and/or fluxing of the assemblies. Separate control of liquid pressure from the cylinders prevents unsoldered components from being dislodged from the assemblies during cleaning and or fluxing.
Inventors
- 👤 Gary L. Hethcoat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:25
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; B23K3/00; B23K3/08; B23K3/082; H; H05; H05K; H05K13/00; H05K13/04; H05K13/046; H05K13/0465; H05K3/00; H05K3/0085; B23K2101/00; B23K2101/36; B23K2101/40; H05K2203/00; H05K2203/07; H05K2203/0736; H05K2203/0746; H05K2203/15; H05K2203/1509; H05K2203/1572; H05K3/22; H05K3/26; H05K3/30; H05K3/32; H05K3/34; H05K3/3489; Y; Y10; Y10S; Y10S134/00; Y10S134/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
186 words
Apparatus to clean or flux circuit card assemblies with a liquid, which comprises: a substantially liquid-tight enclosure with an entrance opening and an exit opening communicating with the interior thereof; means to move said circuit card assemblies along a substantially horizontal path through said interior with entry to and exit from said interior via said respective openings; rotating liquid dispensing means disposed above and below said path and extending laterally thereacross, said dispensing means having separate portions above and below said path adapted to dispense said liquid in a plurality of sprays directed toward said path from above and below said path; means to rotate said dispensing means; conduit means to convey said liquid separately to said portions of said dispensing means under sufficient pressure to cause said sprays to be dispensed; and a plurality of pressure regulation means disposed in said conduit means to separate control of the pressure of said liquid in each of said portions and adapted to permit the liquid in said sprays above said path to be controlled to a different pressure from the liquid in said sprays below said path.
Claim 2
Dependent Claim
186 words
Apparatus to clean or flux circuit card assemblies with a liquid, which comprises: a substantially liquid-tight enclosure with an entrance opening and an exit opening communicating with the interior thereof; means to move said circuit card assemblies along a substantially horizontal path through said interior with entry to and exit from said interior via said respective openings; rotating liquid dispensing means disposed above and below said path and extending laterally thereacross, said dispensing means having separate portions above and below said path adapted to dispense said liquid in a plurality of sprays directed toward said path from above and below said path; means to rotate said dispensing means; conduit means to convey said liquid separately to said portions of said dispensing means under sufficient pressure to cause said sprays to be dispensed; and a plurality of pressure regulation means disposed in said conduit means to separate control of the pressure of said liquid in each of said portions and adapted to permit the liquid in said sprays above said path to be controlled to a different pressure from the liquid in said sprays below said path.
Claim 3
Dependent Claim
29 words
Apparatus as in claim 1 wherein said dispensing means comprises two rotating hollow cylinders with perforated surfaces, one disposed above said path and the other disposed below said path.
Claim 4
Dependent Claim
26 words
Apparatus as in claim 1 further comprising means to collect said liquid dispensed in said sprays and to filter and recycle it to said dispensing means.
Claim 5
Dependent Claim
12 words
Apparatus as in claim 1 further comprising means to heat said liquid.
Claim 6
Dependent Claim
18 words
Apparatus as in claim 1 wherein said conduit is adapted to convey a liquid comprising a fluorinated hydrocarbon.
Claim 7
Dependent Claim
25 words
Apparatus as in claim 5 wherein said conduit is adapted to convey a liquid comprising a mixture of a fluorinated hydrocarbon and a soldering flux.
Claim 8
Dependent Claim
31 words
Apparatus as in claim 1 further comprising a wave soldering device following said apparatus and means to convey said circuit card assemblies to said device immediately after passage through said apparatus.
Claim 9
Dependent Claim
34 words
Apparatus as in claim 1 further comprising a wave soldering device preceding said apparatus and means to convey said circuit card assemblies from said device to said apparatus immediately after passage through said device.
Claim 10
Dependent Claim
13 words
Apparatus as in claim 1 wherein said means to rotate comprises a motor.
References Cited (Backward Citations)
US721445A
Cited
US1561503A
Cited
US2322417A
Cited
US2347781A
Cited
US3190793A
Cited
US3082774A
Cited
US3101730A
Cited
US3298588A
Cited
US3224914A
Cited
US3266502A
Cited
US3291143A
Cited
US3536127A
Cited
US3603329A
Cited
US3616807A
Cited
US3689333A
Cited
US3868272A
Cited
US3865298A
Cited
US4589585A
Cited
US4769083A
Cited
US4767344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |