Patent US3669561A successfully refreshed from Google Patents.
US3669561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic pump
Assignee: Honeywell Inc
•
Filing: 1970-10-09
•
Granted: 1972-06-13
•
Expires: 1990-10-09
Abstract
Abstract A HIGH PRESSURE, LOW VOLUME, HYDRODYNAMIC PUMP COMPRISING A SLEEVE, A SHAFT ROTATABLE WITHIN THE SLEEVE, MEANS TO VARY THE GAP BETWEEN THE SHAFT AND THE SLEEVE, AND AN OUTLET IN THE SLEEVE. WHEN SUBMERGED IN OR OTHERWISE PROVIDED WITH A SUPPLY OF FLUID SUCH AS OIL, RELATIVE MOTION BETWEEN THE SLEEVE AND THE SHAFT RESULTS IN THE ESTABLISHMENT OF A HYDRODYNAMIC PRESSURE BETWEEN THE SLEEVE AND THE SHAFT WHICH PRESSURE CAN BE INCREASED OR DECREASED BY DECREASING OR INCREASING THE GAP BETWEEN THE SLEEVE AND THE SHAFT.
Inventors
- 👤 Richard C Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/001
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |