US3840123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filtration and sampling
Assignee: Pro-Tech Inc
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Filing: 1972-06-13
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Granted: 1974-10-08
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Expires: 1992-06-13
Abstract
Abstract A continuously self-cleaning fluid filter is provided, especially for use in systems of fluid sampling wherein recirculation of part of the fluid filtered thereby is bypassed back through the filter in the reverse direction to clean it. The filter has a foraminous housing that also has end ports to the exterior and has rotatable internal baffling dividing the interior into compartments communicating with the respective ports.
Inventors
- 👤 Clure C Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/62; B01D29/66; B01D29/68; B01D29/682; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
241 words
Self-cleaning filter apparatus comprising a fixed cylindrical housing, the cylindrical wall thereof being impervious at its end portions and foraminous therebetween, having a port between each interior End portion of the housing to the exterior thereof; an internal divider extending axially and radially throughout the interior portion surrounded laterally by the foraminous portion of the housing wall, the outermost parts of the divider being in wiping contact with the inside surface of that wall portion; and contiguous throughout their radial extent with the endmost parts of the divider a pair of disclike end baffles extending radially to the inside wall of the housing but spaced respectively from opposite end walls of the housing and thereby defining such interior end portions, each baffle having an opening therethrough, the respective openings communicating with respective compartments so formed in the housing interior and bounded by the divider and the baffles together with the cylindrical wall portion, the divider and the baffles being rotatable together about the housing axis; and means for rotating the divider and baffles together, whereupon the respective compartments are interchangeable relative to the cylindrical wall of the housing and the flow direction through the foraminous wall portion interchanges accordingly. 2. Apparatus comprising filter apparatus according to claim 1, a main conduit connected via one of the ports thereof to a use location and a bypass conduit branching from the main conduit and connected to the outer port of the filter apparatus.
Claim 2
Dependent Claim
12 words
Apparatus according to claim 2, including fluid-sampling apparatus at the use location.
Claim 3
Dependent Claim
171 words
Apparatus according to claim 3, wherein the fluid-sampling apparatus is adapted to sampling liquids, th filter apparatus is immersed in a body of liquid to be sampled, and including a waste conduit leading away from the sampling apparatus. 5. Self-cleaning filter apparatus comprising a generally cylindrical housing having impervious end portions and a foraminous intermediate portion, with a port from each end portion of the housing to the exterior thereof; an internal divider extending axially and radially throughout an interior portion surrounded laterally by the foraminous intermediate portion of the housing wall, thereby dividing the interior portion into at least two separate compartments separated from the end portions by baffle components of the divider, each baffle having an opening therethrough, the respective baffle openings communicating with respective compartments so formed in the housing interior, the divider with baffles being rotatable together about the housing axis, whereupon the respective interior compartments are interchangeable relative to the intermediate portion of the housing and the flow direction through the foraminous portion thereof interchanges accordingly.
Claim 4
Dependent Claim
24 words
Self-cleaning filter apparatus according to claim 5, including a foraminous support for one end of the divider between the adjacent end compartment and port.
Claim 5
Dependent Claim
202 words
In self-cleaning filter apparatus comprising a fixed cylindrical housing having a foraminous cylindrical wall, the improvement comprising an internal divider extending axially the foraminous length of the cylindrical wall and radially in opposite directions, the opposite radially outermost parts of the divider being in wiping contact with the inside surface of the cylindrical wall and thereby forming with the endmost parts of the divider respective intake and outlet compartments in the housing interior; and means for rotating the divider, whereupon the respective compartments are interchangeable relative to the cylindrical wall of the housing, wherein the divider comprises a pair of disclike end baffles extending radially to the foraminous wall of the housing but spaced respectively from opposite end walls of the housing and thereby defining opposite interior end portions, each baffle having an opening therethrough, the respective baffle openings communicating with respective compartments so formed in the housing interior and bounded by the divider and the baffles together with the foraminous wall, such opening in one baffle interconnecting thE end compartment adjacent thereto with the intake compartment in the housing interior, and such opening in the other baffle interconnecting the end compartment adjacent thereto with the outlet compartment in the housing interior.
Claim 6
Dependent Claim
202 words
In self-cleaning filter apparatus comprising a fixed cylindrical housing having a foraminous cylindrical wall, the improvement comprising an internal divider extending axially the foraminous length of the cylindrical wall and radially in opposite directions, the opposite radially outermost parts of the divider being in wiping contact with the inside surface of the cylindrical wall and thereby forming with the endmost parts of the divider respective intake and outlet compartments in the housing interior; and means for rotating the divider, whereupon the respective compartments are interchangeable relative to the cylindrical wall of the housing, wherein the divider comprises a pair of disclike end baffles extending radially to the foraminous wall of the housing but spaced respectively from opposite end walls of the housing and thereby defining opposite interior end portions, each baffle having an opening therethrough, the respective baffle openings communicating with respective compartments so formed in the housing interior and bounded by the divider and the baffles together with the foraminous wall, such opening in one baffle interconnecting thE end compartment adjacent thereto with the intake compartment in the housing interior, and such opening in the other baffle interconnecting the end compartment adjacent thereto with the outlet compartment in the housing interior.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |