US3083893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contra-rotating blower
Assignee: Benson Manufacturing Co
•
Filing: 1960-06-02
•
Granted: 1963-04-02
•
Expires: 1980-06-02
Abstract
No abstract record available.
Inventors
- 👤 George A Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:32
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/02; F04D19/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PUMP COMPRISING A CASING HAVING AN INLET AND AN OUTLET, A COMPOUND ELECTRIC MOTOR HAVING TWO SECTIONS PLACED IN SIDE-BY-SIDE RELATION AND HAVING SHAFTS THEREIN IN AXIAL ALIGNMENT IN THE CASING, THE SHAFTS OF SAID MOTOR SECTIONS BEING ROTATIVE IN DIFFERENT DIRECTIONS, ONE OF THE SHAFTS CARRYING A VANED ROTOR ADJACENT TO THE INLET, THE SECOND SHAFT CARRYING A VANED IMPELLER ADJACENT TO THE
Claim 2
Dependent Claim
65 words
A PUMP COMPRISING A CASING HAVING AN INLET AND AN OUTLET, A COMPOUND ELECTRIC MOTOR HAVING TWO SECTIONS PLACED IN SIDE-BY-SIDE RELATION AND HAVING SHAFTS THEREIN IN AXIAL ALIGNMENT IN THE CASING, THE SHAFTS OF SAID MOTOR SECTIONS BEING ROTATIVE IN DIFFERENT DIRECTIONS, ONE OF THE SHAFTS CARRYING A VANED ROTOR ADJACENT TO THE INLET, THE SECOND SHAFT CARRYING A VANED IMPELLER ADJACENT TO THE
References Cited (Backward Citations)
US1835811A
Cited
US1985022A
Cited
US2004571A
Cited
US2031688A
Cited
US2121073A
Cited
US2749459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |