US3208389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage pump
Assignee: Ford Motor Co
•
Filing: 1962-12-06
•
Granted: 1965-09-28
•
Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 John P Stefan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/06; F04D1/08; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F04D29/447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A TWO STAGE CENTRIFUGAL PUMPING DEVICE COMPRISING A PUMP HOUSING HAVING A FLUID INLET AND A FLUID OUTLET, A DIRVE SHAFT ROTATABLY SUPPORTED BY SAID PUMP HOUSING, AXIALLY ALIGNED INNER AND OUTER IMPELLERS BEING AFFIXED FOR IN SAID HOUSING, ONE OF SAID IMPELLERS BEING AFFIXED FOR ROTATION WITH SAID SHAFT AND THE OTHER OF SAID IMPELLERS BEING ROTATABLE WITH RESPECT TO SAID ONE OF SAID IMPELLERS, AND SPEED RESPONSIVE CLUTCH MEANS DISPOSED BETWEEN SAID IMPELLERS, SAID SPEED RESPONSIVE CLUTCH MEANS DISENGAGING AND PERMITTING FREE WHEELING OF ONE OF THE IMPELLERS AT HIGH SPEED OF SHAFT ROTATION AND ENGAGING TO FIXEDLY LOCK THE IMPELLERS TOGETHER FOR SIMULTANEOUS ROTATION AT LOW SPEED OF SHAFT ROTATION.
Claim 2
Dependent Claim
113 words
A TWO STAGE CENTRIFUGAL PUMPING DEVICE COMPRISING A PUMP HOUSING HAVING A FLUID INLET AND A FLUID OUTLET, A DIRVE SHAFT ROTATABLY SUPPORTED BY SAID PUMP HOUSING, AXIALLY ALIGNED INNER AND OUTER IMPELLERS BEING AFFIXED FOR IN SAID HOUSING, ONE OF SAID IMPELLERS BEING AFFIXED FOR ROTATION WITH SAID SHAFT AND THE OTHER OF SAID IMPELLERS BEING ROTATABLE WITH RESPECT TO SAID ONE OF SAID IMPELLERS, AND SPEED RESPONSIVE CLUTCH MEANS DISPOSED BETWEEN SAID IMPELLERS, SAID SPEED RESPONSIVE CLUTCH MEANS DISENGAGING AND PERMITTING FREE WHEELING OF ONE OF THE IMPELLERS AT HIGH SPEED OF SHAFT ROTATION AND ENGAGING TO FIXEDLY LOCK THE IMPELLERS TOGETHER FOR SIMULTANEOUS ROTATION AT LOW SPEED OF SHAFT ROTATION.
References Cited (Backward Citations)
DE22082C
Cited
US1827039A
Cited
US1782513A
Cited
US2203843A
Cited
US2336877A
Cited
FR931344A
Cited
FR1033790A
Cited
US2678031A
Cited
US2820588A
Cited
US2819703A
Cited
FR1124752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |