US3870636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Straight-through filter apparatus
Assignee: Kraftwerk Union AG
•
Filing: 1972-10-31
•
Granted: 1975-03-11
•
Expires: 1992-10-31
Abstract
Abstract A straight-through filter apparatus suitable for use in the handling of spent filter elements without contacting the ambient atmosphere. The apparatus is provided with a cylindrical housing having an upper and lower multi-positionable valve at each end of sufficient clearance to enable the passage of a filter element therethrough. Suitable filter media, for example three serially connected filter elements, are longitudinally arranged in the housing with the separation of contaminants of increasingly finer matter taking place in the direction of fluid flow. Such filter elements are held in position by means of releasable positioners disposed along the length of the housing. The housing is also provided with a flange and an associated clamp at each end to positively hold an upper and lower cylindrical body attached at each of such housing ends. Once connected to the housing, the upper and lower cylindrical bodies enable a fresh filter element to be urged into the upper cylindrical body through the specially positioned upper valve and thence into the housing; simultaneously, the ejection of spent filter media takes place through the movement of the spent filter element from the housing, through the lower pre-positioned valve and into the lower cylindrical body.
Inventors
- 👤 Kurt Schettler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/24; B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/25; B01D29/50; B01D29/52; B01D29/54; B01D29/56; B01D29/58; B01D29/96; B01D35/00; B01D35/30; B01D35/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
311 words
A straight-through filter apparatus for contaminated liquid comprising a tubular body forming housing, a plurality of serially connected filter media disposed in said tubular housing; connecting means disposed between said filter media and serially connecting said filter media one to the other; said filter media and said tubular housing defining therebetween an annular passageway for receiving therein clean liquid filterable through said filter media; valve means located respectively at each end of said tubular housing; contaminated liquid inlet means commucating with one of said valve means, and clean liquid outlet means communicating with said annular passageway, said one valve means being constructed and arranged so that in a first position it transmits contaminated liquid introducible through said inlet means to said filter media for filtering contaminants therefrom, the clean liquid passing into said annular passageway and being dischargeable from said annular passageway through said outlet means; said valve means at each end of said tubular housing being formed with a respective valve opening having a cross section corresponding to the cross sectional area of said filter media and including a respective housing cover located on each of said valve means, the other valve means being constructed and arranged so that in a first position it blocks fluid flow from said tubular housing to its respective cover, the apparatus further comprising respective tubular containers interchangeable with said housing covers for removing the filter media from said tubular housing and replacing them with other filter media, said valve means being shiftable to a second position wherein said respective valve openings are aligned with said tubular housing and means for urging fresh filter media from one of said tubular containers through one of said valve openings into said tubular housing and simultaneously urging spent filter media in said tubular housing through the other of said valve openings into the other of said tubular containers.
Claim 2
Dependent Claim
311 words
A straight-through filter apparatus for contaminated liquid comprising a tubular body forming housing, a plurality of serially connected filter media disposed in said tubular housing; connecting means disposed between said filter media and serially connecting said filter media one to the other; said filter media and said tubular housing defining therebetween an annular passageway for receiving therein clean liquid filterable through said filter media; valve means located respectively at each end of said tubular housing; contaminated liquid inlet means commucating with one of said valve means, and clean liquid outlet means communicating with said annular passageway, said one valve means being constructed and arranged so that in a first position it transmits contaminated liquid introducible through said inlet means to said filter media for filtering contaminants therefrom, the clean liquid passing into said annular passageway and being dischargeable from said annular passageway through said outlet means; said valve means at each end of said tubular housing being formed with a respective valve opening having a cross section corresponding to the cross sectional area of said filter media and including a respective housing cover located on each of said valve means, the other valve means being constructed and arranged so that in a first position it blocks fluid flow from said tubular housing to its respective cover, the apparatus further comprising respective tubular containers interchangeable with said housing covers for removing the filter media from said tubular housing and replacing them with other filter media, said valve means being shiftable to a second position wherein said respective valve openings are aligned with said tubular housing and means for urging fresh filter media from one of said tubular containers through one of said valve openings into said tubular housing and simultaneously urging spent filter media in said tubular housing through the other of said valve openings into the other of said tubular containers.
Claim 3
Dependent Claim
311 words
A straight-through filter apparatus for contaminated liquid comprising a tubular body forming housing, a plurality of serially connected filter media disposed in said tubular housing; connecting means disposed between said filter media and serially connecting said filter media one to the other; said filter media and said tubular housing defining therebetween an annular passageway for receiving therein clean liquid filterable through said filter media; valve means located respectively at each end of said tubular housing; contaminated liquid inlet means commucating with one of said valve means, and clean liquid outlet means communicating with said annular passageway, said one valve means being constructed and arranged so that in a first position it transmits contaminated liquid introducible through said inlet means to said filter media for filtering contaminants therefrom, the clean liquid passing into said annular passageway and being dischargeable from said annular passageway through said outlet means; said valve means at each end of said tubular housing being formed with a respective valve opening having a cross section corresponding to the cross sectional area of said filter media and including a respective housing cover located on each of said valve means, the other valve means being constructed and arranged so that in a first position it blocks fluid flow from said tubular housing to its respective cover, the apparatus further comprising respective tubular containers interchangeable with said housing covers for removing the filter media from said tubular housing and replacing them with other filter media, said valve means being shiftable to a second position wherein said respective valve openings are aligned with said tubular housing and means for urging fresh filter media from one of said tubular containers through one of said valve openings into said tubular housing and simultaneously urging spent filter media in said tubular housing through the other of said valve openings into the other of said tubular containers.
Claim 4
Dependent Claim
311 words
A straight-through filter apparatus for contaminated liquid comprising a tubular body forming housing, a plurality of serially connected filter media disposed in said tubular housing; connecting means disposed between said filter media and serially connecting said filter media one to the other; said filter media and said tubular housing defining therebetween an annular passageway for receiving therein clean liquid filterable through said filter media; valve means located respectively at each end of said tubular housing; contaminated liquid inlet means commucating with one of said valve means, and clean liquid outlet means communicating with said annular passageway, said one valve means being constructed and arranged so that in a first position it transmits contaminated liquid introducible through said inlet means to said filter media for filtering contaminants therefrom, the clean liquid passing into said annular passageway and being dischargeable from said annular passageway through said outlet means; said valve means at each end of said tubular housing being formed with a respective valve opening having a cross section corresponding to the cross sectional area of said filter media and including a respective housing cover located on each of said valve means, the other valve means being constructed and arranged so that in a first position it blocks fluid flow from said tubular housing to its respective cover, the apparatus further comprising respective tubular containers interchangeable with said housing covers for removing the filter media from said tubular housing and replacing them with other filter media, said valve means being shiftable to a second position wherein said respective valve openings are aligned with said tubular housing and means for urging fresh filter media from one of said tubular containers through one of said valve openings into said tubular housing and simultaneously urging spent filter media in said tubular housing through the other of said valve openings into the other of said tubular containers.
Claim 5
Dependent Claim
32 words
A straight-through filter apparatus as claimed in claim 1, wherein each of said valve means is a three way valve, adapted to provide sufficient clearance for the passage of said filter media.
Claim 6
Dependent Claim
43 words
In a straight-through filter apparatus as claimed in claim 1, wherein said housing is provided with flange means for seating said tubular containers; and clamp means cooperating with said flange means to form a tight fit between said housing and said tubular containers.
Claim 7
Dependent Claim
44 words
In a straight-through filter apparatus as claimed in claim 1, wherein said connecting means disposed between said filter media each includes filter positioning means, each of said filter positioning means adapted to co-act with corresponding positiOning members disposed along the length of said housing.
Claim 8
Dependent Claim
61 words
In a straight-through filter apparatus as claimed in claim 1, wherein said tubular containers are each provided with interior passage means adapted to receive said filter media in a manner enabling the simultaneous introduction of fresh filter media through said one tubular container into said housing and the ejection of spent filter media from said housing into said other tubular container.
Claim 9
Dependent Claim
44 words
In a straight-through filter apparatus as claimed in claim 5, wherein said simultaneous transfer of fresh and spent filter media respectively are effectuated by passage of said filter media through said valve means into and out of said housing without contacting the ambient atmosphere.
Claim 10
Dependent Claim
41 words
In a straignt-through filter apparatus as claimed in claim 1, wherein said housing is substantially vertical, and said means for urging said fresh filter media into said housing is located on the tubular container at the upper end of said housing.
Claim 11
Dependent Claim
42 words
In a straight-through filter apparatus as claimed in claim 1, wherein said housing is substantially vertical and the tubular container at the lower end thereof includes opposing means to counter the forces necessary to urge said fresh filter media into said housing.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |