US3931016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning fluid filter
Assignee: Individual
•
Filing: 1975-02-20
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Granted: 1976-01-06
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Expires: 1995-02-20
Abstract
Abstract A self-cleaning fluid filter for filtering fluid entering an inlet of a pump, such as an air pump, in which a fluid filter is wrapped around a filter spool forming a filter drum and the drum coupled to the shaft of the pump motor for rotation thereof. The fluid entering the rotating filter will then be filtered of its impurities which, due to centrifugal force, will be dispersed outwardly from the filter drum to drop into a residue container. A deflector plate is disposed in proximity to the inlet for deflecting heavy particles to the residue container.
Inventors
- 👤 Grady R. Lovelady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:49
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
A self-cleaning fluid filter comprising: a housing, said housing having an intake opening in one side thereof, and a centrally located exhaust opening in a top portion thereof; a pump disposed immediately above said exhaust opening, said pump having a plurality of blades; a pump duct surrounding said pump and having an exhaust opening; an annular plate fixedly attached to the bottom edges of the blades of said pump; a cylindrical filter drum attached to said annular plate at a top portion thereof and extending downwardly into said housing through said centrally located exhaust opening, said annular plate and said cylindrical filter drum being disposed in close proximity to said exhaust opening with said annular plate overlapping said exhaust opening; and a deflection plate disposed in proximity to said inlet in the direction of flow from said inlet and angled for deflecting particles away from said cylindrical drum.
Claim 2
Dependent Claim
148 words
A self-cleaning fluid filter comprising: a housing, said housing having an intake opening in one side thereof, and a centrally located exhaust opening in a top portion thereof; a pump disposed immediately above said exhaust opening, said pump having a plurality of blades; a pump duct surrounding said pump and having an exhaust opening; an annular plate fixedly attached to the bottom edges of the blades of said pump; a cylindrical filter drum attached to said annular plate at a top portion thereof and extending downwardly into said housing through said centrally located exhaust opening, said annular plate and said cylindrical filter drum being disposed in close proximity to said exhaust opening with said annular plate overlapping said exhaust opening; and a deflection plate disposed in proximity to said inlet in the direction of flow from said inlet and angled for deflecting particles away from said cylindrical drum.
Claim 3
Dependent Claim
27 words
The self-cleaning fluid filter of claim 1 and further including: a conical guide extending downwardly from said exhaust opening in said housing converging towards said exhaust opening.
Claim 4
Dependent Claim
18 words
The self-cleaning fluid filter of claim 1 and further including: an adjustable damper disposed in said pump duct.
Claim 5
Dependent Claim
21 words
The self-cleaning fluid filter of claim 1 wherein: said inlet and said deflection plate are disposed directly beneath said filter drum.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |