US3606586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air injection pump
Assignee: Futurecraft Corp
•
Filing: 1969-07-14
•
Granted: 1971-09-20
•
Expires: 1989-07-14
Abstract
Abstract AN AIR INJECTION PUMP IN WHICH A NOZZLE HAS PARTS IN FIXED COACTING RELATION TO FORM AN OUTLET OPENING FOR DISCHARGING AN ANNULAR STREAM OF PRESSURIZED FLUID AT A RELATIVELY HIGH VELOCITY INTO THE THROAT END OF A VENTURI PASSAGEWAY FOR INDUCING A LARGE QUANTITY OF AMBIENT OUTSIDE FLUID SUCH AS AIR TO ENTER THE PASSAGEWAY THROUGH FLOW PATHS INTERIORLY AND EXTERIORLY OF THE ANNULAR NOZZLE DISCHARGE STEAM, SO AS TO PROVIDE A COMBINED FLOW OF THE STREAMS THROUGH THE PASSAGEWAY WHICH WILL HAVE A SUBSTANTIALLY UNIFORM VELOCITY GRADIENT ACROSS THE PASSAGEWAY, AND THEREBY PRODUCE GREATER EFFICIENCY OF THE PUMPING OPERATION.
Inventors
- 👤 Meyer Piet
- 👤 Murray A Chilcoat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/466; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87587; Y10T137/87643
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |