US3155473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaner for air screen
Assignee: Cockshutt Farm Equipment of Canada Ltd
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Filing: 1961-09-15
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Granted: 1964-11-03
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Mcneil Donald Hector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
B; B60; B60K; B60K11/00; B60K11/02; B60K11/04; F; F01; F01P; F01P11/00; F01P11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN A TRAVELLING AGRICULTURAL MACHINE HAVING A UNIT THAT DRAWS IN A STREAM OF PRIMARY AIR, AN AIR INTAKE HOUSING FOR THE UNIT, THE HOUSING HAVING AN AIR SCREEN FOR FILTERING THE PRIMARY AIR DRAWN THROUGH THE SCREEN AND INTO THE HOUSING BY THE UNIT, A ROTATABLE SHAFT EXTENDING THROUGH THE SCREEN, A PROPELLER FIXED TO THE SHAFT WITHIN THE HOUSING FOR ROTATION BY THE PRIMARY AIR STREAM, AN ELONGATED CONDUIT FIXED TO THE SHAFT WITHIN THE HOUSING AND HAVING ALONG ITS LENGTH OUTLET OPENINGS FACING AND CLOSE TO THE SCREEN, AN AIR SCOOP LOCATED IN THE PRIMARY AIR STREAM AND DOWNSTREAM OF THE SCREEN, AN AIR PASSAGE EXTENDING FROM THE AIR SCOOP THROUGH THE SHAFT TO THE ELONGATED CONDUIT TO SUPPLY PART OF THE PRIMARY AIR TO THE TO DISLODGE SOLID MATTER SCREENED FROM THE PRIMARY AIR, AND A SWEEPER FIXED TO THE SHAFT OUTSIDE THE HOUSING AND EXTENDING FROM THE SHAFT CLOSE TO THE SCREEN AND CONDUIT TO CLEAR AWAY THE DISLOGED MATTER.
Claim 2
Dependent Claim
165 words
IN A TRAVELLING AGRICULTURAL MACHINE HAVING A UNIT THAT DRAWS IN A STREAM OF PRIMARY AIR, AN AIR INTAKE HOUSING FOR THE UNIT, THE HOUSING HAVING AN AIR SCREEN FOR FILTERING THE PRIMARY AIR DRAWN THROUGH THE SCREEN AND INTO THE HOUSING BY THE UNIT, A ROTATABLE SHAFT EXTENDING THROUGH THE SCREEN, A PROPELLER FIXED TO THE SHAFT WITHIN THE HOUSING FOR ROTATION BY THE PRIMARY AIR STREAM, AN ELONGATED CONDUIT FIXED TO THE SHAFT WITHIN THE HOUSING AND HAVING ALONG ITS LENGTH OUTLET OPENINGS FACING AND CLOSE TO THE SCREEN, AN AIR SCOOP LOCATED IN THE PRIMARY AIR STREAM AND DOWNSTREAM OF THE SCREEN, AN AIR PASSAGE EXTENDING FROM THE AIR SCOOP THROUGH THE SHAFT TO THE ELONGATED CONDUIT TO SUPPLY PART OF THE PRIMARY AIR TO THE TO DISLODGE SOLID MATTER SCREENED FROM THE PRIMARY AIR, AND A SWEEPER FIXED TO THE SHAFT OUTSIDE THE HOUSING AND EXTENDING FROM THE SHAFT CLOSE TO THE SCREEN AND CONDUIT TO CLEAR AWAY THE DISLOGED MATTER.
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |