US3228342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller seal for a centrifugal pump
Assignee: BARNES Manufacturing CO
•
Filing: 1963-11-13
•
Granted: 1966-01-11
•
Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Oswald V Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:49
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/165; F04D29/167; A; A47; A47L; A47L15/00; A47L15/42; A47L15/4214; A47L15/4225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A CENTRIFUGAL PUMP COMPRISING A HOUSING DEFINING AN IMPELLER CHAMBER, A DRIVING SHAFT, AN IMPELLER RIGIDLY CONNECTED TO THE SHAFT AND ADAPTED TO ROTATE WITHIN SAID IMPELLER CHAMBER, SAID IMPELLER HAVING A CENTRAL HUB THAT FORMS THE INLET THEREFOR, SAID HUB MOUNTING A CYLINDRICAL RING MEMBER THEREON, A U-SHAPED ANNULAR CUP SEAL OF A RUBBERY MATERIAL PROVIDED BETWEEN SAID HUB AND SAID HOUSING, SAID SEAL HAVING ONE LEG RIGIDLY CONNECTED TO THE HOUSING AND A SECOND LEG LOCATED ADJACENT THE HUB, SAID SECOND LEG BEING NORMALLY RADIALLY SPACED FROM SAID RING MEMBER BELOW A PREDETERMINED ROTATABLE SPEED FOR SAID IMPELLER AND RESPONSIVE TO PRESSURE IN SAID CHAMBER TO FLEX AND BEAR AGAINST SAID RING MEMBER WHEN THE IMPELLER IS ROTATING ABOVE SAID PREDETERMINED SPEED.
Claim 2
Dependent Claim
124 words
A CENTRIFUGAL PUMP COMPRISING A HOUSING DEFINING AN IMPELLER CHAMBER, A DRIVING SHAFT, AN IMPELLER RIGIDLY CONNECTED TO THE SHAFT AND ADAPTED TO ROTATE WITHIN SAID IMPELLER CHAMBER, SAID IMPELLER HAVING A CENTRAL HUB THAT FORMS THE INLET THEREFOR, SAID HUB MOUNTING A CYLINDRICAL RING MEMBER THEREON, A U-SHAPED ANNULAR CUP SEAL OF A RUBBERY MATERIAL PROVIDED BETWEEN SAID HUB AND SAID HOUSING, SAID SEAL HAVING ONE LEG RIGIDLY CONNECTED TO THE HOUSING AND A SECOND LEG LOCATED ADJACENT THE HUB, SAID SECOND LEG BEING NORMALLY RADIALLY SPACED FROM SAID RING MEMBER BELOW A PREDETERMINED ROTATABLE SPEED FOR SAID IMPELLER AND RESPONSIVE TO PRESSURE IN SAID CHAMBER TO FLEX AND BEAR AGAINST SAID RING MEMBER WHEN THE IMPELLER IS ROTATING ABOVE SAID PREDETERMINED SPEED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |