Patent US4358303A successfully refreshed from Google Patents.
US4358303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating debris screen for alternator
Assignee: Navistar International Corp
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Filing: 1979-08-31
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Granted: 1982-11-09
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Expires: 1999-08-31
Abstract
Abstract An alternator filter arrangement which encorporates an alternator having a driven shaft passing through its housing which has an air intake therein and a non-magnetic filter screen mounted for rotation with the driven shaft with the filter screen being in close proximity to and substantially encompassing the air intake.
Inventors
- 👤 Donald G. Rakow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:37
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/26; B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
In a filter arrangement for a high speed alternator of a vehicle, said alternator having an enclosing housing, said housing being formed by a substantially annular body connecting first planer wall having cooling air outlet and second planer wall having cooling air inlet, and having a driven shaft passing through said first planar wall, said shaft having a power receiving end outside said housing, the improvement including, in combination: said shaft extending through said housing, exiting said second wall, and having a filter mounting end outside said housing; said cooling air inlet being located in said second wall; and a non-magnetic self-cleaning filter screen secured on and for rotation with said filter mounting end in the magnetic field of said alternator and in close proximity to and encompassing said air inlet, said screen being an apertured disc having a circumferential lip angled toward said second wall.
Claim 2
Dependent Claim
146 words
In a filter arrangement for a high speed alternator of a vehicle, said alternator having an enclosing housing, said housing being formed by a substantially annular body connecting first planer wall having cooling air outlet and second planer wall having cooling air inlet, and having a driven shaft passing through said first planar wall, said shaft having a power receiving end outside said housing, the improvement including, in combination: said shaft extending through said housing, exiting said second wall, and having a filter mounting end outside said housing; said cooling air inlet being located in said second wall; and a non-magnetic self-cleaning filter screen secured on and for rotation with said filter mounting end in the magnetic field of said alternator and in close proximity to and encompassing said air inlet, said screen being an apertured disc having a circumferential lip angled toward said second wall.
Claim 3
Dependent Claim
110 words
In a filter arrangement for an alternator, said alternator having a cooling air inlet and an enclosing housing formed by a substantially annular body connecting first planer wall having cooling air outlet and second planer wall having cooling air outlet, and having a driven shaft passing through said first and second planar wall the improvement comprising: a filter mounting end on said shaft outside said housing; a non-magnetic self-cleaning filter screen, being an apertured disc having a circumferential lip angled toward said second wall, secured on and for rotation with said filter mounting end in the magnetic field of said alternator in close proximity to and encompassing said air inlet.
Claim 4
Dependent Claim
110 words
In a filter arrangement for an alternator, said alternator having a cooling air inlet and an enclosing housing formed by a substantially annular body connecting first planer wall having cooling air outlet and second planer wall having cooling air outlet, and having a driven shaft passing through said first and second planar wall the improvement comprising: a filter mounting end on said shaft outside said housing; a non-magnetic self-cleaning filter screen, being an apertured disc having a circumferential lip angled toward said second wall, secured on and for rotation with said filter mounting end in the magnetic field of said alternator in close proximity to and encompassing said air inlet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |