US3792573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaning structure
Assignee: Individual
•
Filing: 1972-04-06
•
Granted: 1974-02-19
•
Expires: 1992-04-06
Abstract
Abstract An air cleaner for an internal combustion engine embodying a centrifuging action to direct dust particles into a duct for exhaust to the atmosphere having separated the same for air directed into a chamber of increasing size for reduction of the velocity of said air as it approaches the vents through which it is drawn for passage to said engine.
Inventors
- 👤 L Borsheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:49
CPC Classifications
B; B04; B04C; B04C3/00; B01; B01D; B01D45/00; B01D45/12; B01D45/16; B01D50/00; F; F02; F02M; F02M33/00; F02M33/02; F02M33/08; F02M35/00; F02M35/02; F02M35/022; Y; Y10; Y10S; Y10S55/00; Y10S55/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
An air cleaner for an internal combustion engine, having in combination a cylindrical housing formed with an outer wall, an inner wall spaced from said outer wall forming a duct of narrow radial width within said housing, said duct decreasing in height from its inlet end toward its outlet end and having an overlying top wall, the outlet end of said duct communicating with the atmosphere, an inlet into said housing tangential thereto and spaced from the adjacent inlet end of said duct, an upright tubular member within said housing disposed in an axially off center position with respect thereto in the direction of said inlet and with respect to said duct disposed substantially thereabout, said tubular member having a plurality of circumferentially spaced vents, a passage in said tubular member for communication with an engine, and said vents opening to said passage.
Claim 2
Dependent Claim
143 words
An air cleaner for an internal combustion engine, having in combination a cylindrical housing formed with an outer wall, an inner wall spaced from said outer wall forming a duct of narrow radial width within said housing, said duct decreasing in height from its inlet end toward its outlet end and having an overlying top wall, the outlet end of said duct communicating with the atmosphere, an inlet into said housing tangential thereto and spaced from the adjacent inlet end of said duct, an upright tubular member within said housing disposed in an axially off center position with respect thereto in the direction of said inlet and with respect to said duct disposed substantially thereabout, said tubular member having a plurality of circumferentially spaced vents, a passage in said tubular member for communication with an engine, and said vents opening to said passage.
Claim 3
Dependent Claim
57 words
The structure set forth in claim 1, wherein said duct at its inlet end extends substantially the full height of said inlet of said housing, said top of said duct defining a helical path to said outlet end of said duct, and an outlet extending outwardly of said housing receiving therein said outlet end of said duct.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |