US3102481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Curtiss Wright Corp
•
Filing: 1958-12-19
•
Granted: 1963-09-03
•
Expires: 1978-12-19
Abstract
No abstract record available.
Inventors
- 👤 Willis A Stoner
- 👤 Dean A Rains
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:26
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; B; B64; B64D; B64D37/00; B64D37/02; B64D37/14; B64D37/16; F02; F02M; F02M37/00; F02M37/04; F02M37/08; F02M37/10; F02M37/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A PUMP FOR LIQUIDS, COMPRISING IN COMBINATION A CASING OPEN AT THE BOTTOM AND HAVING A VERTICALLY DISPOSED LONGITUDINAL AXIS; A CENTRIFUGAL IMPELLER DISPOSED WITHIN SAID CASING COAXIAL THEREWITH AND ROTATABLE ABOUT SAID AXIS IN A PLANE NORMAL THERETO, SAID CENTRIFUGAL IMPELLER HAVING A PLURALITY OF IMPELLER BLADES HAVING EXIT PASSAGES THEREBETWEEN, SAID BLADES BEING DISPOSED IN A GENERALLY ANNULAR CONFIGURATION WITH THE LEADING EDGES OF THE BLADES POSITIONED AT THE INNER CIRCUMFERENCE OF THE ANNULUS AND THE TRAILING EDGES POSITIONED AT THE OUTER CIRCUMFERENCE OF THE ANNULUS, THE LEADING EDGES OF SAID BLADES DEFINING AN UPPER AXIAL CHAMBER COMMUNICATING WITH SAID EXIT PASSAGES; AN INDUCER COAXIAL WITH SAID IMPELLER AND POSITIONED THEREBELOW AND ROTATABLE THEREWITH, SAID INDUCER COMPRISING A GENERALLY ANNULAR ELEMENT HAVING A PLURALITY OF ANNULARLY DISPOSED INDUCER BLADES EXTENDING DOWNWARDLY THEREFROM TO BELOW THE BOTTOM OF THE SAID CASING AND HAVING ENTRANCE PASSAGES THEREBETWEEN, SAID INDUCER BLADES BEING INWARDLY INCLINED
Claim 2
Dependent Claim
153 words
A PUMP FOR LIQUIDS, COMPRISING IN COMBINATION A CASING OPEN AT THE BOTTOM AND HAVING A VERTICALLY DISPOSED LONGITUDINAL AXIS; A CENTRIFUGAL IMPELLER DISPOSED WITHIN SAID CASING COAXIAL THEREWITH AND ROTATABLE ABOUT SAID AXIS IN A PLANE NORMAL THERETO, SAID CENTRIFUGAL IMPELLER HAVING A PLURALITY OF IMPELLER BLADES HAVING EXIT PASSAGES THEREBETWEEN, SAID BLADES BEING DISPOSED IN A GENERALLY ANNULAR CONFIGURATION WITH THE LEADING EDGES OF THE BLADES POSITIONED AT THE INNER CIRCUMFERENCE OF THE ANNULUS AND THE TRAILING EDGES POSITIONED AT THE OUTER CIRCUMFERENCE OF THE ANNULUS, THE LEADING EDGES OF SAID BLADES DEFINING AN UPPER AXIAL CHAMBER COMMUNICATING WITH SAID EXIT PASSAGES; AN INDUCER COAXIAL WITH SAID IMPELLER AND POSITIONED THEREBELOW AND ROTATABLE THEREWITH, SAID INDUCER COMPRISING A GENERALLY ANNULAR ELEMENT HAVING A PLURALITY OF ANNULARLY DISPOSED INDUCER BLADES EXTENDING DOWNWARDLY THEREFROM TO BELOW THE BOTTOM OF THE SAID CASING AND HAVING ENTRANCE PASSAGES THEREBETWEEN, SAID INDUCER BLADES BEING INWARDLY INCLINED
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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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |