US4218320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil filter device
Assignee: Individual
•
Filing: 1979-01-31
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Granted: 1980-08-19
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Expires: 1999-01-31
Abstract
Abstract This invention relates to a lubricating oil filter device, more particularly to an attached accessory of either electromagnet or permanent magnet wound around the main body of the lubricating oil filter device. When the oil with fine iron particles flows through the main body, the fine iron particles will not penetrate the rolled filter paper but will be attracted by the magnetic force onto the inner wall of the main body so as to lengthen the duration of the filter paper.
Inventors
- 👤 Sung M. Liaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:57
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
383 words
A lubricating oil filter device comprising: a cylindrical housing through which lubricating oil passes, said housing having an outer wall which is impermeable to lubricating oil and which is formed of a material which can be magnetized, said housing having an inlet defined therein and an outlet defined therein, said inlet and outlet being positioned so that lubricating oil flows longitudinally of said housing in passing through said housing; a filter medium located within said housing so that lubricating oil passing through said housing flows parallel to said housing outer wall for a substantial portion of the length of said outer wall and flows so that such lubricating oil flows between said housing outer wall and said filter medium coaxially of said housing as well as through said filter medium, said filter medium removing particles from lubricating oil passing through said housing; removing means for removing fine iron particles from lubricating oil passing through said housing, said removing means including an electric winding wound around the outside of said housing, means for connecting said winding to an electric system of an automobile to be energized thereby, said energized winding magnetizing said housing to attract fine iron particles to said housing outer wall, said removing means further including a hollow metal column located inside said filter medium, said metal column being dimensioned and designed for supporting said filter medium and being formed of material which can be magnetized and having a multiplicity of holes defined therein through which lubricating oil can pass, said column being magnetized by said energized winding to attract any iron particles still remaining in lubricating oil after such lubricating oil has passed through said filter medium; said electric winding magnetizing said housing outer wall and said column in a manner such that most of the fine iron particles in lubricating oil passing longitudinally through said housing are attracted to said housing outer wall to form a coating on said housing outer wall, said energized winding magnetizing said coating so that further fine iron particles will be separated from lubricating oil passing through said housing and will be attracted to said coating whereby fine iron particles are removed from lubricating oil passing through said housing by said magnetized housing outer wall, said magnetized coating, said filter medium and said magnetized column.
Claim 2
Dependent Claim
383 words
A lubricating oil filter device comprising: a cylindrical housing through which lubricating oil passes, said housing having an outer wall which is impermeable to lubricating oil and which is formed of a material which can be magnetized, said housing having an inlet defined therein and an outlet defined therein, said inlet and outlet being positioned so that lubricating oil flows longitudinally of said housing in passing through said housing; a filter medium located within said housing so that lubricating oil passing through said housing flows parallel to said housing outer wall for a substantial portion of the length of said outer wall and flows so that such lubricating oil flows between said housing outer wall and said filter medium coaxially of said housing as well as through said filter medium, said filter medium removing particles from lubricating oil passing through said housing; removing means for removing fine iron particles from lubricating oil passing through said housing, said removing means including an electric winding wound around the outside of said housing, means for connecting said winding to an electric system of an automobile to be energized thereby, said energized winding magnetizing said housing to attract fine iron particles to said housing outer wall, said removing means further including a hollow metal column located inside said filter medium, said metal column being dimensioned and designed for supporting said filter medium and being formed of material which can be magnetized and having a multiplicity of holes defined therein through which lubricating oil can pass, said column being magnetized by said energized winding to attract any iron particles still remaining in lubricating oil after such lubricating oil has passed through said filter medium; said electric winding magnetizing said housing outer wall and said column in a manner such that most of the fine iron particles in lubricating oil passing longitudinally through said housing are attracted to said housing outer wall to form a coating on said housing outer wall, said energized winding magnetizing said coating so that further fine iron particles will be separated from lubricating oil passing through said housing and will be attracted to said coating whereby fine iron particles are removed from lubricating oil passing through said housing by said magnetized housing outer wall, said magnetized coating, said filter medium and said magnetized column.
References Cited (Backward Citations)
US3035703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |