US4051033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter device
Assignee: Blace Filtronics Inc
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Filing: 1975-12-22
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Granted: 1977-09-27
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Expires: 1995-12-22
Abstract
Abstract A diatomite filter device for cleansing fluid carrying particulate matter in the micron size range comprises a filter housing having top and bottom plates and a manifold beneath the latter. A supply conduit communicates with the manifold and with a valve-controlled diatomite reservoir. Flexible tubular filter bags in the housing have inlet openings at the bottom and are mounted about flanges adjacent inlet openings in the housing bottom plate, the latter being in communication with the manifold for a supply of fluid. Each bag has an interior skeletal frame for preventing bag collapse during a backwash operation and an exterior wire mesh skeletal frame for preventing ballooning of the bag during the filter operation. The assemblies comprising a bag and its two associated skeletal frames are mounted at lower end portions about their flanges by means of clamping rings and, preferably, each flange has a horizontal flange at the top notched to receive lower end portions of the inner skeletal frame. The lower end portions of the bags and the exterior skeletal frames are bent inwardly beneath the horizontal flange and about the mounting flange. The wire mesh of the exterior frame is approximately one-quarter inch square, of stainless steel and, optionally, of epoxy-coated construction.
Inventors
- 👤 Roy J. Blace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D2201/00; B01D2201/04; B01D2201/043
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
278 words
Filter apparatus for internal precoat of filter bags, and for fluid flow respectively in an upward and downward direction for filtering fluid and providing backwash cleaning of said apparatus, said apparatus comprising an upright housing having sidewalls, a top cover with an outlet for filtered fluid located therein, a bottom cover with an inlet for fluid to be filtered located therein, a horizontally arranged bottom wall located in a lower portion of said housing and spaced above said bottom cover, circular openings located in said bottom wall with short tubular flange sections located at said openings and extending upwardly therefrom, vertically extending rod members constructed and arranged to define a vertical skeleton tube surrounding each of said tubular flange sections, a flexible tubular filter bag with a closed top, sidewalls, and an open bottom surrounding each of said skeleton tubes, the lower edge of the sidwall of each bag sealingly connected to the tubular flange section which it surrounds, perforate frame means surrounding the exterior surface of each of said filter bags with clamp means arranged at the lower edge thereof as fastening means connecting said exterior frame, said filter bag, and said skeleton tube to the exterior surface of its corresponding tubular flange, filter aid media supply means connected to said bottom cover inlet whereby it may be introduced to the interior of each of said filter bags by a pressurized source of fluid to be filtered, backwash means in fluid communication with said top cover outlet whereby backwash of said filter bags occurs in a direction from the exterior to the interior through their sidewalls with discharge of washed material through said bottom cover inlet opening.
Claim 2
Dependent Claim
278 words
Filter apparatus for internal precoat of filter bags, and for fluid flow respectively in an upward and downward direction for filtering fluid and providing backwash cleaning of said apparatus, said apparatus comprising an upright housing having sidewalls, a top cover with an outlet for filtered fluid located therein, a bottom cover with an inlet for fluid to be filtered located therein, a horizontally arranged bottom wall located in a lower portion of said housing and spaced above said bottom cover, circular openings located in said bottom wall with short tubular flange sections located at said openings and extending upwardly therefrom, vertically extending rod members constructed and arranged to define a vertical skeleton tube surrounding each of said tubular flange sections, a flexible tubular filter bag with a closed top, sidewalls, and an open bottom surrounding each of said skeleton tubes, the lower edge of the sidwall of each bag sealingly connected to the tubular flange section which it surrounds, perforate frame means surrounding the exterior surface of each of said filter bags with clamp means arranged at the lower edge thereof as fastening means connecting said exterior frame, said filter bag, and said skeleton tube to the exterior surface of its corresponding tubular flange, filter aid media supply means connected to said bottom cover inlet whereby it may be introduced to the interior of each of said filter bags by a pressurized source of fluid to be filtered, backwash means in fluid communication with said top cover outlet whereby backwash of said filter bags occurs in a direction from the exterior to the interior through their sidewalls with discharge of washed material through said bottom cover inlet opening.
Claim 3
Dependent Claim
34 words
Filter apparatus as set forth in claim 1 wherein said vertical skeleton tube also includes annular horizontal rings secured internally of said vertical rod members and in spaced relationship with the filter bag sidewall.
Claim 4
Dependent Claim
33 words
Filter apparatus as set forth in claim 1 wherein said tubular flanges define internal openings for the upflow of precoat fluid which are of substantially lesser diameter than that of the filter bags.
Claim 5
Dependent Claim
20 words
Filter apparatus as set forth in claim 3 wherein said flange opening diameters are approximately one half the bag diameter.
Claim 6
Dependent Claim
34 words
A filter apparatus as set forth in claim 1 wherein said perforate frame means takes the form of an upstanding skeletal frame having a tubular configuration and being disposed closely about said filter bag.
Claim 7
Dependent Claim
35 words
A filter apparatus as set forth in claim 5 wherein said skeletal frame takes the form of a wire mesh having a small generally rectangular openings with a maximum dimension no greater than 2 inches.
Claim 8
Dependent Claim
18 words
A filter apparatus as set forth in claim 6 wherein said mesh openings are approximately one-quarter inch square.
Claim 9
Dependent Claim
18 words
A filter apparatus as set forth in claim 6 wherein said wire mesh is of stainless steel construction.
Claim 10
Dependent Claim
72 words
A filter apparatus as set forth in claim 1 wherein each of said tubular flanges has an annular generally horizontally outwardly projecting flange at an upper end portion thereof, and wherein each said horizontal flange has a plurality of circumaxially spaced outwardly open notches therein, said notches respectively receiving said vertical rod members and said members extending vertically beneath said horizontal flange, the aforesaid clamp means also being disposed beneath said flange.
Claim 11
Dependent Claim
66 words
A filter apparatus as set forth in claim 10 wherein each lower end portion of each of said perforate frame means and filter bags is bent generally radially inwardly beneath its associated horizontal flange by its associated clamp means, the latter being disposed externally of the said frame means, and the assembled elements thus being secured against unintended vertical upward displacement relative to the associated flange.
Claim 12
Dependent Claim
39 words
A filter apparatus as set forth in claim 10 wherein each filter bag has an annular enlargement at its lower end portion, said enlargement being disposed beneath the associated clamp means to secure the bag against unintended upward displacement.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |