US4439218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen cleaning means
Assignee: Blue Leaf IP Inc
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Filing: 1982-07-06
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Granted: 1984-03-27
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Expires: 2002-07-06
Abstract
Abstract Cleaning mechanism for a screen such as a radiator screen mounted adjacent an air-cooled radiator and air-circulating fan for a water-cooled engine to prevent debris from clogging the air passages of the radiator and including a frame supporting the screen as aforesaid, a motor driven shaft extending substantially centrally through the screen, transverse arms rotated by the shaft and having dislodging members in wiping relation to the air-inlet face of the screen, and baffle plates carried by the shaft for rotation relative to the air discharge face of the screen and in alignment with the arms and dislodging members to neutralize the suction effect of the air-circulating fan for the radiator and thereby permit debris dislodged by the members to fall by gravity from the screen.
Inventors
- 👤 Edward H. Priepke
- 👤 Ronald L. McAllister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/06; B; B01; B01D; B01D46/00; B01D46/10; F01P11/12; F01P2011/063
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
224 words
In combination with a screen of planar configuration having an air-intake side and an air-discharge side, cleaning means for said screen comprising: (a) a frame supporting said screen; (b) a shaft supported by said frame and extending through said screen for rotation relative to said screen; (c) a sweep arm connected to said shaft and disposed on said air-intake side of said screen; (d) a baffle member connected to said shaft and disposed on said air-discharge side of said screen opposite said sweep arm; (e) means to rotate said shaft causing said sweep arm and said baffle member to rotate together so that said baffle member blocks off successive portions of said screen on said air-discharge side to thereby permit said sweep arm to sweep debris from said air-intake side of said screen; and (f) a flexible member mounted on said sweep arm in wiping engagement with said air-intake side of said screen, said flexible member having an inner end and an outer end with said inner end being located closer to said shaft than said outer end, and said flexible member being arranged so that said inner end moves in advance of said outer end during rotation of said sweep arm thereby causing debris accumulating on said air-intake side of said screen to be pushed outwardly in a direction away from said shaft.
Claim 2
Dependent Claim
224 words
In combination with a screen of planar configuration having an air-intake side and an air-discharge side, cleaning means for said screen comprising: (a) a frame supporting said screen; (b) a shaft supported by said frame and extending through said screen for rotation relative to said screen; (c) a sweep arm connected to said shaft and disposed on said air-intake side of said screen; (d) a baffle member connected to said shaft and disposed on said air-discharge side of said screen opposite said sweep arm; (e) means to rotate said shaft causing said sweep arm and said baffle member to rotate together so that said baffle member blocks off successive portions of said screen on said air-discharge side to thereby permit said sweep arm to sweep debris from said air-intake side of said screen; and (f) a flexible member mounted on said sweep arm in wiping engagement with said air-intake side of said screen, said flexible member having an inner end and an outer end with said inner end being located closer to said shaft than said outer end, and said flexible member being arranged so that said inner end moves in advance of said outer end during rotation of said sweep arm thereby causing debris accumulating on said air-intake side of said screen to be pushed outwardly in a direction away from said shaft.
Claim 3
Dependent Claim
57 words
The combination according to claim 1, further comprising a second sweep arm connected to said shaft and extending generally radially therefrom in a direction substantially opposite to said first mentioned sweep arm, and a second baffle member connected to said shaft and extending generally radially therefrom in a direction substantially opposite to said first mentioned baffle member.
Claim 4
Dependent Claim
32 words
The combination according to claim 1, wherein said baffle member has a leading portion which moves in advance of said flexible member as said sweep arm and said baffle member rotate together.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |