Patent US2019356A successfully refreshed from Google Patents.
Patent US4359388A successfully refreshed from Google Patents.
US4359388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter
Assignee: Individual
•
Filing: 1981-01-27
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Granted: 1982-11-16
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Expires: 2001-01-27
Abstract
Abstract A dust removing fluid filter has a continuous filter material web wound about a rotatable drum. The free end of the web is attached to a collector shaft which winds up the filter material web as it becomes contaminated.
Inventors
- 👤 Ing R. V. Nordenskjold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:37
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18; B01D46/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
208 words
A fluid filter apparatus for removing foreign material such as for instance dust from a fluid medium by forcing the fluid medium through a filter material, said apparatus comprising drum support means (4, 7a) a drum (7) having a circumferential surface and mounted on said drum support means for rotation about the drum axis, a continuous filter material web (8) wound about the circumferential surface of said drum (7) in a plurality of layers and having a free outer end, means (15) coupled to the filter apparatus and in flow communication with the drum for forcing a fluid medium having a foreign material therein through the plurality of layers on said drum with said fluid medium passing from the outermost layer through the successive layers whereby the foreign material is primarily deposited on the outermost layer and a clean fluid is removed from the interior of the drum, a collector shaft (9) rotatably mounted substantially parallel to the axis of the drum, means connecting the free outer end of said web to said collector shaft (9), and means for actuating said collector shaft to wind the outermost layer of said filter material web (8) from said drum to the collector shaft as the contamination of the layer proceeds.
Claim 2
Dependent Claim
208 words
A fluid filter apparatus for removing foreign material such as for instance dust from a fluid medium by forcing the fluid medium through a filter material, said apparatus comprising drum support means (4, 7a) a drum (7) having a circumferential surface and mounted on said drum support means for rotation about the drum axis, a continuous filter material web (8) wound about the circumferential surface of said drum (7) in a plurality of layers and having a free outer end, means (15) coupled to the filter apparatus and in flow communication with the drum for forcing a fluid medium having a foreign material therein through the plurality of layers on said drum with said fluid medium passing from the outermost layer through the successive layers whereby the foreign material is primarily deposited on the outermost layer and a clean fluid is removed from the interior of the drum, a collector shaft (9) rotatably mounted substantially parallel to the axis of the drum, means connecting the free outer end of said web to said collector shaft (9), and means for actuating said collector shaft to wind the outermost layer of said filter material web (8) from said drum to the collector shaft as the contamination of the layer proceeds.
Claim 3
Dependent Claim
58 words
A fluid filter apparatus according to claim 1, wherein said collector shaft (9) is located laterally of said drum (7) and is constructed and arranged to support the portion of said filter material web (8) extending from said drum towards said collector shaft such that the upper surface of the web is covered with the collected foreign material.
Claim 4
Dependent Claim
53 words
A fluid filter apparatus according to claim 1 or 2, wherein said collector shaft (9) is rotatably driven by drive means (10) which drive said shaft so as to wind said filter material web (8) onto the collector shaft such that said contaminated surface of the web faces inwardly toward the collector shaft.
Claim 5
Dependent Claim
37 words
A fluid filter apparatus according to claim 3 wherein said collector shaft (9) is located above the axis of rotation of said drum (7) and having its circumferential surface located beneath the circumferential surface of said drum.
Claim 6
Dependent Claim
103 words
A fluid filter apparatus according to claim 3 including a supply roll (11) of said filter material web, a roll supply shaft mounted in spaced relation to said drum, said supply roll mounted on said support shaft and having a continuous length of said filter web wound thereon and having an outer end, said support shaft being adapted to rotate for removal of the web and permitting the end of said web of said supply roll to be connected to the drum and wound directly from the supply roll onto said drum for the replenishment of the multiple layer web on the drum.
Claim 7
Dependent Claim
130 words
A fluid filter apparatus according to claim 3 wherein said collector shaft (9) is located above the axis of rotation of said drum (7) and having its circumferential surface located beneath the circumferential surface of said drum, a supply roll (11) of said filter material web, a support shaft mounted in space relation to said drum, said supply roll mounted in said support shaft and having a continuous length of said filter web wound thereon and having an outer end, said support shaft being adapted to rotate for removal of the web and permitting the end of said web of said supply roll to be connected to the drum and wound directly from the supply roll onto said drum for the replenishment of the multiple layer web on the drum.
Claim 8
Dependent Claim
42 words
A fluid filter apparatus according to any one of claims 1 or 2 wherein said collector shaft (9) is located above the axis of rotation of said drum (7) and having its circumferential surface located beneath the circumferential surface of said drum.
Claim 9
Dependent Claim
105 words
A fluid filter apparatus according to claim 1 or 2 including a supply roll (11) of said filter material web, a support shaft mounted in spaced relation to said drum, said supply roll being mounted on said support shaft and having a continuous length of said filter web wound thereon and having an outer end, said support shaft being adapted to rotate for removal of the web and permitting the end of said web of said supply roll to be connected to the drum and wound directly from the supply roll onto said drum for the replenishment of the multiple layer web on the drum.
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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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |