Patent US3584439A successfully refreshed from Google Patents.
US3584439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid cleaner
Assignee: Donaldson Co Inc
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Filing: 1968-06-20
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Granted: 1971-06-15
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Expires: 1988-06-20
Abstract
Abstract A generally cylindrical hollow housing having an inlet and an outlet therein and having a generally cylindrical pervious filter element mounted therein so as to leave a passageway between the pervious filter element and the inner surface of the housing substantially therearound and so that all fluid passing through the housing from the inlet to the outlet must pass through the pervious filter element. Vaned means, mounted within the housing inlet, including a plurality of members having a surface formed to direct all fluid entering the inlet into the housing in generally spiral shaped paths around the pervious filter element to produce centrifugal separating action within the housing prior to passage of the fluid through the pervious filter element.
Inventors
- 👤 Donald D Gronholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:44
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/88; B01D29/90; B01D29/902; B01D29/908; B01D46/0039; B01D46/0041; B01D46/0046; B01D46/24; B01D46/2403; B01D46/2411; B01D50/00; B01D50/20; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
An improved fluid cleaner comprising: a. a generally cylindrical hollow housing having an outwardly extending tubular inlet affixed thereto and an outlet; b. generally cylindrical fluid pervious filter means; c. means mounting said pervious filter means within said housing to provide a passageway for fluid between the outer surface of said filter means and an inner surface of said housing so that all fluid moving through said housing from said inlet to said outlet must pass through said pervious filter means; and d. vane means including a plurality of spaced apart members each being formed to present a generally arcuate surface to incoming fluid and each of said members being positioned within the inlet with the arcuate surface canted at an acute angle to the longitudinal axis of said pervious filter means and further canted so as to be substantially tangential to said pervious filter means so that the incoming fluid is directed into generally spiral shaped paths about and progressing axially along said pervious filter means.
Claim 2
Dependent Claim
167 words
An improved fluid cleaner comprising: a. a generally cylindrical hollow housing having an outwardly extending tubular inlet affixed thereto and an outlet; b. generally cylindrical fluid pervious filter means; c. means mounting said pervious filter means within said housing to provide a passageway for fluid between the outer surface of said filter means and an inner surface of said housing so that all fluid moving through said housing from said inlet to said outlet must pass through said pervious filter means; and d. vane means including a plurality of spaced apart members each being formed to present a generally arcuate surface to incoming fluid and each of said members being positioned within the inlet with the arcuate surface canted at an acute angle to the longitudinal axis of said pervious filter means and further canted so as to be substantially tangential to said pervious filter means so that the incoming fluid is directed into generally spiral shaped paths about and progressing axially along said pervious filter means.
Claim 3
Dependent Claim
49 words
An improved fluid cleaner as set forth in claim 1 wherein the inlet of the housing is a section of conduit affixed to said housing having an outlet opening in communication with the passageway for fluid in said housing and an inlet opening substantially smaller than said outlet opening.
Claim 4
Dependent Claim
47 words
An improved fluid cleaner s set forth in claim 1 including an element mounted between the pervious filter means and the housing inlet having a fluid impervious portion adjacent the housing inlet to prevent fluid from traveling directly from the housing inlet through the pervious filter means.
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |