US3186643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray gun having disk, diaphragm and plug construction
Assignee: Individual
•
Filing: 1963-03-04
•
Granted: 1965-06-01
•
Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Philip F George
- 👤 Leonard M Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:58
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/24; B05B7/2402; B05B7/244; B05B7/2443; B05B7/02; B05B7/12; Y; Y10; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3294; Y10T137/3331; Y10T137/4891
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
IN A DEVICE FOR PREVENTING BACKFLOW OF A FLUID, THE COMBINATION OF: A CONDUIT FOR FLUID HAVING AN INLET PORTION AND AN OUTLET PORTION; A SUBSTANTIALLY RIGID FLAT DISK DISPOSED ACROSS SAID CONDUIT IN SAID INLET PORTION AND HAVING A GENERALLY ANNULAR PERFORATE PORTION SURROUNDING A CENTRAL IMPERFORATE PORTION; AND A GENERALLY FLAT RESILIENT DIAPHRAGM DISPOSED ACROSS SAID CONDUIT ON THE OUTLET SIDE OF AND ADJACENT SAID DISK, SAID DIAPHRAGM HAVING A FLAT CENTRAL PORTION ALIGNED WITH SAID CENTRAL IMPERFORATE PORTION OF SAID DISK AND HAVING SLITS THEREIN, AND A PLURALITY OF GENERALLY ANNULAR SEALING SURFACES SURROUNDING SAID CENTRAL SLITS, SAID FLAT CENTRAL PORTION AND SAID ANNULAR SEALING SURFACES CONTACTING SAID IMPERFORATE CENTRAL PORTION OF SAID DISK WHEN SAID DIAPHRAGM IS IN AN UNDISTENDED POSITION TO PREVENT BACKFLOW OF FLUID FROM SAID OUTLET PORTION TO SAID INLET PORTION THROUGH SAID SLITS IN SAID DIAPHRAGM AND SAID PERFORATE PORTION OF SAID DISK.
References Cited (Backward Citations)
US2507410A
Cited
US2646063A
Cited
US2675147A
Cited
US2665170A
Cited
US2761734A
Cited
US2789010A
Cited
US2897835A
Cited
US2875776A
Cited
US2939474A
Cited
US3023767A
Cited
US3034731A
Cited
US3039492A
Cited
US3042314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |