US3295749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan enclosure
Assignee: WILLIAMS FURNACE Co
•
Filing: 1964-06-23
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Granted: 1967-01-03
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Karl L Bedell
- 👤 Charles R Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:23
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/10; F24H3/105; F04; F04D; F04D17/00; F04D17/08; F04D17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
IN COMBINATION WITH A MULTIBLADED FAN HAVING AN AXIAL INPUT TO THE BLADES AND A PERIPHERAL OUTPUT FROM THE BLADES, A LOW NOISE ENCLOSURE COMPRISING: (A) A WALL HEATER ENCLOSURE HAVING A CIRCULAR INLET PORT FORMED IN ITS FRONT SURFACE; (B) MEANS ROTATABLY MOUNTING SAID FAN INTERIOR OF SAID ENCLOSURE FACING SAID INLET PORT WITH THE FRONTMOST EDGES OF THE FAN BLADES LYING IN A PLANE PARALLEL TO SAID FRONT SURFACE AND A PRESELECTED LINEAR DISTANCE THEREBEHIND; (C) THE TIPS OF SAID BLADES RADIALLY SPACED APART FROM THE EDGES OF THE CIRCULAR INLET PORT A PRESELECTED DISTANCE APPROXIMATELY EQUAL TO SAID PRESELECTED LINEAR DISTANCE; AND, (D) A CIRCULAR COWL DISPOSED AROUND THE OUTSIDE OF SAID FAN AND AFFIXED TO THE INTERIOR OF SAID ENCLOSURE AT A RADIALLY SPACED APART DISTANCE FROM THE TIPS OF SAID FAN BLADES APPROXIMATELY EQUAL TO ONE-HALF OF EITHER OF SAID PRESELECTED DISTANCES; (E) SAID COWL EXTENDING REARWARDLY ALONGSIDE THE TIPS OF SAID FAN BLADES FOR APPROXIMATELY 40-50% OF THE DEPTH OF SAID FAN TO OPTIMIZE THE INLET AND OUTLET AREAS FOR SAID FAN.
Claim 2
Dependent Claim
178 words
IN COMBINATION WITH A MULTIBLADED FAN HAVING AN AXIAL INPUT TO THE BLADES AND A PERIPHERAL OUTPUT FROM THE BLADES, A LOW NOISE ENCLOSURE COMPRISING: (A) A WALL HEATER ENCLOSURE HAVING A CIRCULAR INLET PORT FORMED IN ITS FRONT SURFACE; (B) MEANS ROTATABLY MOUNTING SAID FAN INTERIOR OF SAID ENCLOSURE FACING SAID INLET PORT WITH THE FRONTMOST EDGES OF THE FAN BLADES LYING IN A PLANE PARALLEL TO SAID FRONT SURFACE AND A PRESELECTED LINEAR DISTANCE THEREBEHIND; (C) THE TIPS OF SAID BLADES RADIALLY SPACED APART FROM THE EDGES OF THE CIRCULAR INLET PORT A PRESELECTED DISTANCE APPROXIMATELY EQUAL TO SAID PRESELECTED LINEAR DISTANCE; AND, (D) A CIRCULAR COWL DISPOSED AROUND THE OUTSIDE OF SAID FAN AND AFFIXED TO THE INTERIOR OF SAID ENCLOSURE AT A RADIALLY SPACED APART DISTANCE FROM THE TIPS OF SAID FAN BLADES APPROXIMATELY EQUAL TO ONE-HALF OF EITHER OF SAID PRESELECTED DISTANCES; (E) SAID COWL EXTENDING REARWARDLY ALONGSIDE THE TIPS OF SAID FAN BLADES FOR APPROXIMATELY 40-50% OF THE DEPTH OF SAID FAN TO OPTIMIZE THE INLET AND OUTLET AREAS FOR SAID FAN.
References Cited (Backward Citations)
US1304671A
Cited
GB189708421A
Cited
US2665841A
Cited
US2967047A
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US3131236A
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US3120225A
Cited
US3199773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |