US3085741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal fans
Assignee: American Radiator and Standard Sanitary Corp
•
Filing: 1959-11-23
•
Granted: 1963-04-16
•
Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 Burkhardt Kenneth William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:44
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/4206; F04D29/422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE COMBINATION COMPRISING A FAN HOUSING INCLUDING TWO SUBSTANTIALLY PARALLEL SIDE WALLS; AT LEAST ONE OF SAID SIDE WALLS HAVING AN INLET OPENING THEREIN; AN INLET THROAT STRUCTURE EXTENDING INTO THE HOUSING FROM SAID INLET OPENING; A CENTRIFUGAL FAN WHEEL WITHIN THE HOUSING IN ALIGNMENT WITH THE INLET THROAT STRUCTURE FOR RECEIVING GAS WITHIN ITS INTERIOR; SAID FAN HOUSING DEFINING A DISCHARGE OPENING EXTENDING ENTIRELY ACROSS THE SPACE BETWEEN THE SIDE WALLS; A CUT-OFF STRUCTURE EXTENDING WITHIN THE DISCHARGE OPENING FROM SAID ONE SIDE WALL TO A POINT IN SUBSTANTIAL RADIAL ALIGNMENT WITH A SIDE SURFACE OF THE WHEEL TO INTERCEPT A PORTION OF THE GAS DISCHARGED FROM THE WHEEL AND RECIRCULATE IT AROUND THE OUTSIDE OF THE ANNULAR INLET THROAT; AND A WALL STRUCTURE EXTENDING FROM THE CUT-OFF STRUCTURE TOWARD THE THROAT STRUCTURE ADJACENT A SIDE SURFACE OF THE FAN WHEEL FOR INTERCEPTING A PORTION OF THE GAS DISCHARGED FROM THE WHEEL AND DEFLECTING IT THROUGH THE DISCHARGE OPENING.
Claim 2
Dependent Claim
160 words
THE COMBINATION COMPRISING A FAN HOUSING INCLUDING TWO SUBSTANTIALLY PARALLEL SIDE WALLS; AT LEAST ONE OF SAID SIDE WALLS HAVING AN INLET OPENING THEREIN; AN INLET THROAT STRUCTURE EXTENDING INTO THE HOUSING FROM SAID INLET OPENING; A CENTRIFUGAL FAN WHEEL WITHIN THE HOUSING IN ALIGNMENT WITH THE INLET THROAT STRUCTURE FOR RECEIVING GAS WITHIN ITS INTERIOR; SAID FAN HOUSING DEFINING A DISCHARGE OPENING EXTENDING ENTIRELY ACROSS THE SPACE BETWEEN THE SIDE WALLS; A CUT-OFF STRUCTURE EXTENDING WITHIN THE DISCHARGE OPENING FROM SAID ONE SIDE WALL TO A POINT IN SUBSTANTIAL RADIAL ALIGNMENT WITH A SIDE SURFACE OF THE WHEEL TO INTERCEPT A PORTION OF THE GAS DISCHARGED FROM THE WHEEL AND RECIRCULATE IT AROUND THE OUTSIDE OF THE ANNULAR INLET THROAT; AND A WALL STRUCTURE EXTENDING FROM THE CUT-OFF STRUCTURE TOWARD THE THROAT STRUCTURE ADJACENT A SIDE SURFACE OF THE FAN WHEEL FOR INTERCEPTING A PORTION OF THE GAS DISCHARGED FROM THE WHEEL AND DEFLECTING IT THROUGH THE DISCHARGE OPENING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |