Patent US2242355A successfully refreshed from Google Patents.
Patent US3305164A successfully refreshed from Google Patents.
US3305164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fans of the cross-flow type
Assignee: LAING VORTEX Inc
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Filing: 1965-08-17
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Granted: 1967-02-21
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Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 Laing Nikolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:34
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/02; F04D17/04; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A FAN UNIT COMPRISING AN ELECTRIC MOTOR HAVING A DRIVE SHAFT, A PAIR OF BLADED CYLINDRICAL ROTORS ONE ON EITHER SIDE OF THE MOTOR AND EACH DEFINING AN INTERIOR SPACE AND HAVING ONE END MOUNTED ON THE CORRESPONDING END OF THE MOTOR DRIVE SHAFT, AND GUIDE MEANS COMPRISING A PAIR OF SPACED GUIDE WALLS SECURED TO THE MOTOR AND EXTENDING GENERALLY PARALLEL TO THE AXIS OF THE ROTORS OVER THE WHOLE LENGTH BETWEEN THE EXTREME ENDS OF THE ROTORS AND A PAIR OF OUTER END WALLS JOINING THE GUIDE WALLS AND IN SUBSTANTIAL ALIGNMENT WITH SAID EXTREME ENDS, SAID GUIDE WALLS FORMING A FRAME FOR SAID FAN UNIT, SAID WALLS DEFINING AN ENTRY REGION FOR EACH ROTOR AT ONE SIDE OF THE UNIT AND A COMMON DISCHARGE REGION AT ANOTHER SIDE OF THE UNIT, SAID GUIDE MEANS CO-OPERATING WITH THE ROTORS,
Claim 2
Dependent Claim
141 words
A FAN UNIT COMPRISING AN ELECTRIC MOTOR HAVING A DRIVE SHAFT, A PAIR OF BLADED CYLINDRICAL ROTORS ONE ON EITHER SIDE OF THE MOTOR AND EACH DEFINING AN INTERIOR SPACE AND HAVING ONE END MOUNTED ON THE CORRESPONDING END OF THE MOTOR DRIVE SHAFT, AND GUIDE MEANS COMPRISING A PAIR OF SPACED GUIDE WALLS SECURED TO THE MOTOR AND EXTENDING GENERALLY PARALLEL TO THE AXIS OF THE ROTORS OVER THE WHOLE LENGTH BETWEEN THE EXTREME ENDS OF THE ROTORS AND A PAIR OF OUTER END WALLS JOINING THE GUIDE WALLS AND IN SUBSTANTIAL ALIGNMENT WITH SAID EXTREME ENDS, SAID GUIDE WALLS FORMING A FRAME FOR SAID FAN UNIT, SAID WALLS DEFINING AN ENTRY REGION FOR EACH ROTOR AT ONE SIDE OF THE UNIT AND A COMMON DISCHARGE REGION AT ANOTHER SIDE OF THE UNIT, SAID GUIDE MEANS CO-OPERATING WITH THE ROTORS,
References Cited (Backward Citations)
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Cited
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US1950768A
Cited
US2203491A
Cited
US2942773A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |