US3890236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter structure
Assignee: AG-Water Inc
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Filing: 1974-01-14
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Granted: 1975-06-17
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Expires: 1994-01-14
Abstract
Abstract A filter structure as disclosed in which a tubular selfsupporting foraminous element and a flexible self-supporting filter element are located within the interior of a housing by flanges extending into the interior of the housing and into the interiors of these tubular elements adjacent to the ends of these tubular elements. Elastomeric rings are located externally of these flanges against the tubular filter element so as to be held under compression by the foraminous element in order to secure the filter element in place. One of the flanges is located on a closure of the housing so as to permit assembly and disassembly of the structure.
Inventors
- 👤 Gary W Harrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:14
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/25; B01D29/62; B01D29/66; B01D29/96; B01D2201/00; B01D2201/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
238 words
IN A FILTER STRUCTURE HAVING A HOUSING PROVIDED WITH AN INLET AND AN OUTLET AND HAVING A FILTER MEANS LOCATED SO THAT LIQUID FLOWS THROUGH SAID FILTER STRUCTURE DURING THE OPERATION OF SAID FILTER STRUCTURE THE IMPROVEMENT WHICH COMPRISES: SAID HOUSING BEING PROVIDED WITH A CLOSURE ENABLING SAID HOUSING TO BE OPENED AND CLOSED, SAID CLOSURE BEING LOCATED OPPOSITE SAID INLET, A FIRST TUBULAR FLANGE LOCATED ON SAID HOUSING SO AS TO EXTEND INTERNALLY OF SAID HOUSING AROUND SAID INLET, A SECOND TUBULAR FLANGE OF THE SAMD DIAMETER AS SAID FIRST TUBULAR FLANGE LOCATED ON SAID CLOSURE SO AS TO EXTEND INTERNALLY OF SAID CLOSURE, SAID SECOND FLANGE BEING ALIGNED WITH SAID FIRST FLANGE A SELF-SUPPORTING FORAMINOUS TUBULAR MEMBER LOCATED SO AS TO EXTEND THROUGH SAID HOUSING, SAID FORAMINOUS MEMBER EXTENDING AROUND BOTH OF SAID FLANGES, THE EXTERIOR OF SAID FORAMINOUS MEMBER BEING SPACED FROM THE INTERIOR OF SAID HOUSING, A FLEXIBLE, FABRIC, TUBULAR FILTER ELEMENT LOCATED SO AS TO EXTEND ALONG THE INTERIOR OF SAID FORAMINOUS MEMBER SAID FILTER ELEMENT HAVING ENDS EXTENDING AROUND THE ENDS OF SAID FORAMINOUS MEMBER AND BACK ALONG THE EXTERIOR OF SAID FORAMINOUS MEMBER, AND ELASTOMERIC RESILIENT SEALING RINGS HELD UNDER COMPRESSION BETWEEN SAID FABRIC FILTER ELEMENT AND EACH OF SAID FLANGES, SAID SEALING RINGSS EXTENDING COMPLETELY AROUND SAID FLANGES AND BEING CONSTRAINED AGAINST EXPANSION BY THE SAID FORAMINOUS MEMBER SAID OUTLET LOCATED IN SAID HOUSING EXTERIOLY OF SAID FIRST FILTER ELEMENT.
Claim 2
Dependent Claim
238 words
IN A FILTER STRUCTURE HAVING A HOUSING PROVIDED WITH AN INLET AND AN OUTLET AND HAVING A FILTER MEANS LOCATED SO THAT LIQUID FLOWS THROUGH SAID FILTER STRUCTURE DURING THE OPERATION OF SAID FILTER STRUCTURE THE IMPROVEMENT WHICH COMPRISES: SAID HOUSING BEING PROVIDED WITH A CLOSURE ENABLING SAID HOUSING TO BE OPENED AND CLOSED, SAID CLOSURE BEING LOCATED OPPOSITE SAID INLET, A FIRST TUBULAR FLANGE LOCATED ON SAID HOUSING SO AS TO EXTEND INTERNALLY OF SAID HOUSING AROUND SAID INLET, A SECOND TUBULAR FLANGE OF THE SAMD DIAMETER AS SAID FIRST TUBULAR FLANGE LOCATED ON SAID CLOSURE SO AS TO EXTEND INTERNALLY OF SAID CLOSURE, SAID SECOND FLANGE BEING ALIGNED WITH SAID FIRST FLANGE A SELF-SUPPORTING FORAMINOUS TUBULAR MEMBER LOCATED SO AS TO EXTEND THROUGH SAID HOUSING, SAID FORAMINOUS MEMBER EXTENDING AROUND BOTH OF SAID FLANGES, THE EXTERIOR OF SAID FORAMINOUS MEMBER BEING SPACED FROM THE INTERIOR OF SAID HOUSING, A FLEXIBLE, FABRIC, TUBULAR FILTER ELEMENT LOCATED SO AS TO EXTEND ALONG THE INTERIOR OF SAID FORAMINOUS MEMBER SAID FILTER ELEMENT HAVING ENDS EXTENDING AROUND THE ENDS OF SAID FORAMINOUS MEMBER AND BACK ALONG THE EXTERIOR OF SAID FORAMINOUS MEMBER, AND ELASTOMERIC RESILIENT SEALING RINGS HELD UNDER COMPRESSION BETWEEN SAID FABRIC FILTER ELEMENT AND EACH OF SAID FLANGES, SAID SEALING RINGSS EXTENDING COMPLETELY AROUND SAID FLANGES AND BEING CONSTRAINED AGAINST EXPANSION BY THE SAID FORAMINOUS MEMBER SAID OUTLET LOCATED IN SAID HOUSING EXTERIOLY OF SAID FIRST FILTER ELEMENT.
Claim 3
Dependent Claim
26 words
A filter structure as claimed in claim 1 including: a second discharge outlet located in said closure in communication with the interior of said second flange.
Claim 4
Dependent Claim
65 words
A filter structure as claimed in claim 1 wherein: said foraminous member includes continuous grooves formed in the ends thereof extending outwardly from the interior of said foraminous member adjacent to the ends thereof, said grooves being located opposite said flanges, said elastomeric sealing rings being held under compression within said grooves and being restrained against movement by engagement with the interiors of said grooves.
Claim 5
Dependent Claim
15 words
A filter structure as claimed in claim 3 wherein: said sealing rings are elastomeric O-rings.
Claim 6
Dependent Claim
28 words
A filter structure as claimed in claim 1 wherein: both of said flanges terminate in an inwardly directed edge so as to facilitate assembly of said filter structure.
Claim 7
Dependent Claim
42 words
A filter structure as claimed in claim 1 wherein: said foraminous member is dimensioned so that said filter element is held under compression by engagement with the interior of said housing and with the interior of said closure by said foraminous member.
Claim 8
Dependent Claim
142 words
A filter structure as claimed in claim 1 including: a second discharge outlet located in said closure in communication with the interior of said second flange, and wherein, said foraminous member includes continuous grooves formed in the ends thereof extending outwardly from the interior of said foraminous member adjacent to the ends thereof, said grooves being located opposite said flanges, said elastomeric sealing rings being held under compression within said grooves and being restrained against movement by engagement with the interiors of said grooves, said sealing rings are elastomeric O-rings, both of said flanges terminate in an inwardly directed edge so as to facilitate assembly of said filter structure, said foraminous member is dimensioned so that said filter element is held under compression by engagement with the interior of said housing and with the interior of said closure by said foraminous member.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |