US3690045A - Air filter - Google Patents

Air filter Download PDF

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Publication number
US3690045A
US3690045A US796695A US3690045DA US3690045A US 3690045 A US3690045 A US 3690045A US 796695 A US796695 A US 796695A US 3690045D A US3690045D A US 3690045DA US 3690045 A US3690045 A US 3690045A
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United States
Prior art keywords
filter
stub
stubs
duct
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US796695A
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English (en)
Inventor
Gerhard Max Neumann
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/001—Means for connecting filter housings to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0013—Modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0091—Including arrangements for environmental or personal protection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/88—Replacing filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/203—Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/09—Radioactive filters

Definitions

  • a filter for separation of suspended substances from a flow of air or gas comprises a contaminated gas duct, a filtered-gas duct, each duct having a stub, a disposable filtering assembly having an inlet stub and an outlet stub intended to be attached to the contaminatedgas stub and the filtered stub respectively, and two tubes of flexible sheet material attached to the inlet and outlet stubs respectively.
  • Eachduct stub has two gastight securing means, the first securing means allowing attachment of the corresponding tube the second securing means allowing addition of successive replacement filtering assemblies, after sealing and cutting of the tube, in such a manner that the remnant of tube attached to the duct stub may be detached from the first securing means after being surrounded by a new tube attached to the second securing means. The new tube is subsequently secured by the first securing means and released from the second securing means.
  • the present invention relates to a filter device for separation of suspended and in particular radioactive substances from a flow of air or gas.
  • the filter devices normally employed for separation of suspended substances consist of a filter housing traversed by the gas to be purified, this housing having arranged in it in a sealed manner filter elements situated transversely to the gas flow. Openings closable by means of a cover and externally operated clamping elements-for sealing contact, pressing on the filter elements within the housing, are provided in the filter housing for replacement of the filter elements, as required after saturation of the same.
  • the application of devices of this nature to the separation of suspended radioactive substances in nuclear plants entails the requirement that the necessary replacement of a filter element saturated with dust by a fresh filter element should be performed in such manner that the personnel is protected reliably against injury by radioactive suspended substances.
  • the saturated filter element must be stowed in a sealed protective bag during removal from the filter housing.
  • the opening must be reliably sealed off circumferentially during the replacement, that is, by the protective bag, so that the personnel is protected against direct contact with radioactively contaminated substances.
  • the time required for the exchange of filter elements must be as short as possible, so that the personnel may be protected against radiation damage at high levels of activity.
  • an oval marginal ring having several uninterrupted grooves in its surface has been conventionally arranged around the opening of the filter housing.
  • a bag of synthetic material is secured in the grooves of the marginal ring.
  • the cover of the housing opening must be opened initially, in many instances through the bag itself, and the clamping device for the filter element must be freed.
  • the filter element saturated with dust is then pulled into the bag.
  • the protective bag is sealed off by welding, so that the filter element is situated within a sealed plastic bag, whereas a portion of the plastic bag sealed by the severing weld, is left on the marginal ring.
  • a fresh filter element stowed in another plastic bag is inserted into the opening of the housing in such manner that the protective bag containing the filter element is initially secured in an unoccupied groove of the marginal ring, whereupon the weld-sealed remainder of the previous plastic bag situated on an anterior groove is pulled off the marginal ring, the filter element is pushed into the opening, the clamping device accessible from the outside is operated, and the opening is sealed off by means of a cover.
  • the same procedure must be applied for replacement of the next filter element.
  • This known device causes considerable risks, owing to the structure of the air filter housing and to the application of the plastic bag to the filter element.
  • a filter for separation of suspended substances from a flow of air or gas comprising a contaminated-gas duct, a filtered-gas duct, each duct having a stub, a disposable filtering assembly having an inlet stub and an outlet stub intended to be attached to the contaminated-gas stub and the filtered-gas stub respectively, and two tubes of flexible sheet material attached to the inlet and outlet stubs respectively, each duct stub having two gas-tight securing means, the first securing means allowing attachment of the corresponding tube, the second securing means allowing addition of successive replacement filtering assemblies, after sealing and cutting of the tube, in such a manner that the remnant of tube attached to the duct stub may be detached from the first securing means after being surrounded by a new tube attached to the second securing means, the new tube being subsequently secured by the first securing means and released from the second securing means.
  • a feature of the invention is that the securing means may be continuous grooves formed in the duct stub.
  • the filter assembly consists of a middle portion open at both ends, corresponding to the cross-sectional shape of the filter element, and of two funnel-shaped covering portions, each carrying a connector stub, and overlapping the middle portion with intercalation of seals placed on the filter element, and joined to the central portion, e.g., by means of liquid hardenable substances, to form an integral structural unit.
  • An embodiment of the filter according to the invention is characterized in that the connector stubs of the filter assembly are arranged coaxially relative to each other, and that the filter assembly has projecting pegs on opposite sidewalls of the middle portion arranged displaceably in transverse direction relative to the axis of the connectors in a frame built up from channel sections.
  • the connector stubs of the ducts and the connector stubs of the filter assembly are equipped terminally with matching sealing flanges which may be closed in hermetic manner by means of rapid-release clamps engaging same.
  • the filter assembly is intercalated between the two spaced flanges of an air duct. The displacement of the filter assembly for the purpose of replacing the same should occur transversely to the axis of its connector stubs.
  • a modified embodiment possesses the advantage of requiring a minimum of space for installation purposes. It is characterized in that the filter assembly connector stubs are situated parallel to each other on one side of the filter assembly, and that a main air-duct has a partition situated between its connector stubs for division into contaminated-air and pure-air passages. Rows of connector stubs for reception of a row of filter assemblies, arranged one beside the other, may be provided at one or both sides of the main air duct.
  • Channel-section beams may be arranged on the duct, bearing the filter assembly in-a manner enabling their displacement relative to the axial direction of the connector stubs.
  • This embodiment offers the possibility that a multiplicity of rows of connector stubs may be provided, adjoining the two opposed sides of a box-like duct divided by a partition into a contaminated-gas passage and a pure-gas passage, so that a multiplicity of filter assemblies containing filter elements may be arranged on one duct.
  • the filter assemblies may be arranged contiguously, since a single displacement perpendicular to the side of the duct is necessary for replacement of the filter assemblies, owing to the presence of the connector stubs.
  • pivoted latch means in the formof spring-loaded or analogous screw clamps which are downwardly tippable, are employed to establish the sealed joint between the connector stubs of the filter assemblies and the connector stubs of the duct, and secure the filter assemblies at the extremities of the beams or rails.
  • the connector stubs of the filter assemblies each possess a sealing flange
  • the connector stubs of the duct each possess a contact surface equipped with a seal and receiving the sealing flange.
  • the application of clamping elements engaging the flanges of the connector stubs becomes superfluous, thanks to the provision of the spring-loaded screw clamps, since the latter themselves ensure that the filter assembly is pressed in sealing manner against the duct.
  • These clamps have the additional advantage that they are self-adjusting, thanks to their spring-loading, to take up any give of the seals.
  • FIGS. 1A to 1F are diagrammatical illustrations of different stages of operation of one embodiment, showing the substitution of a fresh filter unit for a contaminated one;
  • FIGS. 1A to 1F are sectional detail views relating to FIGS. lA-lF, respectively;
  • FIG. 2 is an illustration of a modified embodiment of an air duct, in elevation
  • FIG. 2A is a section along the line IIA-ILA of FIG. 2;
  • FIG. 3 is an illustration corresponding to FIG. 2 of a complete apparatus with filter units installed, in side view;
  • FIG. 3A is an elevational view of the apparatus of FIG. 3;
  • FIG. 4 illustrates a single filter unit comprising a filter element in side view
  • FIG. 4A is a plan view of the filter element of FIG. 4;
  • FIG. 5 is an enlarged illustration of a detail of FIG. 4;
  • FIG. 6 is an illustration of the filter unit according to FIG. 4 coupled to the air duct;
  • FIG. 7 is an illustration of another modified embodiment in the disconnected condition
  • FIG. 8 is an illustration corresponding to FIG. 7, showing the connected condition
  • FIG. 9 is an illustrated in perspective of an air duct according to FIG. 2.
  • FIG. 10 is an illustration in perspective of an air duct, with a filter unit disconnected.
  • a filter unit 1 comprising two coaxial connector stubs 2 and 3 is shown in FIGS. 1A to IF.
  • a filter element 26 corresponding to FIG. 1A is situated in the unit 1.
  • the filter unit 1 has its connector stubs 2 and 3 connected to the connector stubs 4 and 5 of an air duct.
  • the stubs 2 and 3 each possess a sealing flange 6, and the connector stubs 4 and 5 each possess a sealing flange 7.
  • the two corresponding sealing flanges 6 and 7 are held in sealing contact by means of a coupling clamp 8 which is releasable from inside or outside the protective tube.
  • Circumferential rings or collars 9 and 10 are situated on the stubs 2, 3 and '4, 5, a plastic tube 11 being fastened on each of these rings, to envelop the two stubs 2, 4 and 3, 5.
  • the circumferential ring 10 has two peripheral grooves 12 and 13 extending parallel to each other, the tube 11 being clipped in these grooves by means of elastic bands and being made of transparent plastic.
  • the filter unit 1 has projecting pegs 14 engaged in a frame 15 made of channel sections.
  • FIG. 1A shows the filter unit 1 coupled to the stubs 4 and 5 of the air duct.
  • the plastic tube 11 is severed and welded shut at the same time at the point 16 by means of welding shears.
  • the filter unit 1 is then pulled out of the frame 15, towards the right, its two connector stubs 2 and 3 being sealed off in gas-tight manner by the two welded plastic hose portions 11.
  • a new filter unit 1 is inserted into the frame 15 according to FIG. 1D.
  • a new plastic tube 17 is clipped on to each of the circumferential rings 9, in each case, the other extremities of these tubes being secured in the outer grooves 13 of the circumferential rings 10 of the stubs 4 and 5.
  • the remainder of the tube 11 present on the inner groove 12 of the circumferential ring 10 is then pulled off and, according to FIG. IF, the filter unit 1 is then brought into the coupled position corresponding to FIG. 1A.
  • the remainder of the plastic tube 11 is received in the part of the tube 17 which envelops the connector stubs 2 and 3 of the filter unit in gas-tight manner.
  • FIGS. 2 to 10 show other embodiments, FIGS. 2 and 2A showing a duct 18 of rectangular cross-section divided into an upper chamber 20 and a lower chamber 21 by a central partitioning plate 19.
  • the central air inlet 20a for the dust-laden air is situated, the air outlet 21a for pure air being situated at the opposite end of the lower chamber 21.
  • Projecting stubs 2 and 3, forming an upper row leading into the chamber 20 and a lower row lead ing into the chamber 21, are situated on both sides of the duct 18.
  • I-beams 22 are situated on the sidewalls of the duct 18, between the stubs 2 and 3.
  • FIGS. 3 and 3A show filter units 23 equipped with connector stubs 24 and 25 parallel to each other and connected to the stubs 2 and 3 in the manner specified in the foregoing, description with plastic tubes affixed to the circumferential rings.
  • the filter units 23 may be displaced on the beams 22 and removed, at right angles to the sidewalls of the air duct 18.
  • the filter unit 23 is shown in detail in FIGS. 4, 4A and 5.
  • This unit comprises a prismatic central portion or casing 26 open at both ends, and containing a coarse filter 30 and a fine filter 31.
  • a frustoconical cover 27 is arranged above the central portion 26, and a similar cover 28 is arranged under the central portion 26.
  • the edges of the covers 27 and 28 overlap the middle portion 26 with seals 32 intercalated between the filters 30, 31 and the cover portions 27, 28.
  • the parts 26, 27 and 28 are combined into a gas-tight unit by sealing the overlapping edges of each a covers 27 and 28.
  • the connector stubs 24 and 25 carrying the circumferential ring 9 and a sealing flange 6, at their front extremity, are arranged on the sides of the covers 27 and 28.
  • FIG. 6 shows the filter unit 23 connected to the duct 18.
  • the filter unit 23, carried by the beam 22, is connected to the duct 18 by means of the stubs 2 and 3 which lead into the duct chambers 20 and 21.
  • clamps 8 straddling the sealing flanges 6 and 7 are situated inside or outside the plastic tube 11 which is secured in the circumferential rings 9 and 10.
  • the clamping elements 8 are freed by action through the tube 1 l or from the outside of the tube 11, whereupon the filter unit 23 is drawn off the stubs 2 and 3 along the beam 22.
  • the filter unit 23 is guided by means of pegs 33.
  • the protective tubes 11, stretched by the removal of the filter unit 23, are severed in the manner shown in FIG. 1C, whereupon a filter unit 23 saturated with dust is pulled out of the beam 22, a new filter unit 23 then being inserted and brought into sealing contact with the stubs 2 and 3 with replacement of a new plastic tube.
  • FIGS. 7 and 8 show a further embodiment of the filter unit 23 in which it is unnecessary to fit clamping elements on the sealing flanges of the stubs.
  • a beam 39 carries at its end a downwardly tippable or foldable screw clamp 34 equipped with a compression spring 35.
  • the screw clamps 34 bear on the rear side of the central portion 26 of the filter unit 23 whose upper and lower guiding flanges 40 bracket the beam 39.
  • the filter unit 23 has an upper and a lower stub 36, these stubs carrying each a circumferential ring 9.
  • An upper and a lower connector stub 37 each carrying a circumferential ring 10 and a comprising an annular contact surface 38 designed for sealing engagement with the confronting flange 6 of a corresponding connector stub 36, are connected to the duct chambers 20 and 21 of the air duct 18.
  • the screw clamps 34 are raised and tightened, so that the flanges of the filter unit 23 are pressed in sealing manner against the seat 38.
  • the give of the seal is taken up continuously by the spring 35.
  • FIG. 9 illustrates in perspective of the air duct 18 according to FIG. 2, comprising beams 22 and springloaded screw clamps 34.
  • FIG. 10 is a similar illustration showing a duct case 41 divided by partitions 42 intoan upper dust-laden-air portion and a lower pure-air portion.
  • the filter unit 23, arranged on this case 41 in the manner described above, is illustrated prior to having its guiding pegs 33 inserted in the rails 22 which in this case form part of a single channel beam bent into U- shape.
  • a gas-purification filter comprising:
  • a filter casing provided with an inlet stub and an outlet stub coaxially confronting said first and second stubs, respectively;
  • pivoted latch means on said rail means for alternately locking said casing in said operative position and facilitating detachment of said casing from said rail means upon removal to said withdrawn position.
  • each of said stubs is provided with an external collar having two parallel grooves, further comprising a pair of elastic bands for each stub receivable in said grooves thereof for alternate engagement with respective tube extremities during replacement of a remnant of a severed tube by a fresh tube.
  • a filter as defined in claim 3 wherein said rail means comprises a pair of channel beams bracketing said casing.
  • a filter as defined in claim 1 wherein said latch means comprises a swingable holder and a clamping screw on said holder.
  • a filter as defined in claim 1 wherein said casing comprises a prismatic box with frustoconical covers on opposite sides thereof respectively bearing said inlet and outlet stubs.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
US796695A 1968-05-03 1969-02-05 Air filter Expired - Lifetime US3690045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681757388 DE1757388B1 (de) 1968-05-03 1968-05-03 Filtervorrichtung zur Abscheidung gesundheitsschaedigender,vorzugsweise radioaktiver Schwebstoffe aus einem Gasstrom

Publications (1)

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US3690045A true US3690045A (en) 1972-09-12

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US796695A Expired - Lifetime US3690045A (en) 1968-05-03 1969-02-05 Air filter

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US (1) US3690045A (enrdf_load_stackoverflow)
CH (1) CH500750A (enrdf_load_stackoverflow)
DE (1) DE1757388B1 (enrdf_load_stackoverflow)
FR (1) FR1600315A (enrdf_load_stackoverflow)
GB (1) GB1238370A (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516400U (enrdf_load_stackoverflow) * 1974-05-31 1976-01-17
US4057406A (en) * 1975-01-13 1977-11-08 Ab Svenska Flaktfabriken Apparatus for removing gas filter
US4197098A (en) * 1976-01-27 1980-04-08 Delbag-Luftfilter Gmbh Filter bypass measurement section
US4198221A (en) * 1977-04-21 1980-04-15 British Nuclear Fuels Limited Particle-in-gas filtering
US4243486A (en) * 1977-09-29 1981-01-06 Delbag-Luftfilter Gmbh Method of mounting filter elements and mounting therefor
US4247315A (en) * 1977-12-12 1981-01-27 Delbag-Luftfilter Gmbh Filter element
US4266955A (en) * 1977-05-31 1981-05-12 United Kingdom Atomic Energy Authority Particle-in-gas filtration
US4334900A (en) * 1980-01-11 1982-06-15 Delbag-Luftfilter Gmbh Filter elements arranged in waste tanks for separating substances which are harmful to the health from flowing air in connection with nuclear installations
US5417729A (en) * 1993-07-08 1995-05-23 Nfs Radiation Protection Systems Portable modular air cleaning system
US5510194A (en) * 1989-07-05 1996-04-23 Alabama Cryogenic Engineering, Inc. Perforated plate filter media and related products
US5516349A (en) * 1994-05-05 1996-05-14 Pyradia, Inc. Modular dust collector
EP1041004A1 (en) * 1999-03-30 2000-10-04 Hosokawa Micron B.V. Changing system for carrier with tubing foil for filling machines
US6149699A (en) * 1992-12-14 2000-11-21 Grantham; James I. Method and apparatus relating to disposable filter modules for filtering air containing hazardous substances
US6585792B2 (en) * 2001-02-20 2003-07-01 Donaldson Company, Inc. Air filtering system having easily removable and replaceable filter element, and methods
US20080072554A1 (en) * 2006-09-27 2008-03-27 Mann & Hummel Gmbh Filter Apparatus Especially for Filtration of Combustion Air in Internal Combustion Engines
US10688429B2 (en) * 2014-03-21 2020-06-23 Life Technologies Corporation Gas filter systems for fluid processing systems
US10711233B2 (en) 2010-02-22 2020-07-14 Life Technologies Corporation Heat exchanger system with flexible bag
US10822582B2 (en) 2014-10-07 2020-11-03 Life Technologies Corporation Regulated vacuum off-gassing of gas filter for fluid processing system and related methods
US10967145B2 (en) 2015-03-31 2021-04-06 Koninklijke Philips N.V. Filter assembly and airway pressure support system employing same
US11229855B2 (en) 2014-03-21 2022-01-25 Life Technologies Corporation Condenser systems for processing a fluid
US11268056B2 (en) 2015-12-29 2022-03-08 Life Technologies Corporation Flexible bioprocessing container with partial dividing partition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017104592U1 (de) * 2017-08-01 2018-11-08 Metall + Plastic Gmbh Rückluftfilterbox sowie Isolator und Isolatorsystem

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US1480399A (en) * 1924-01-08 Dry oas cleaner
US3056499A (en) * 1958-09-26 1962-10-02 Yarrow And Company Filtration of liquids
US3057137A (en) * 1960-05-23 1962-10-09 Joy Mfg Co Gas filter construction
US3310322A (en) * 1964-06-23 1967-03-21 John W Carroll Gas meter change device
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Title
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SGN Bulletin by Nuclear Safety Systems, 551 Fifth Avenue, New York, N.Y. 10017, received January 20, 1967, pages 1, 10, 11, 12, 13, 19, 20, 21, and 22. *
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516400U (enrdf_load_stackoverflow) * 1974-05-31 1976-01-17
US4057406A (en) * 1975-01-13 1977-11-08 Ab Svenska Flaktfabriken Apparatus for removing gas filter
US4197098A (en) * 1976-01-27 1980-04-08 Delbag-Luftfilter Gmbh Filter bypass measurement section
US4198221A (en) * 1977-04-21 1980-04-15 British Nuclear Fuels Limited Particle-in-gas filtering
US4266955A (en) * 1977-05-31 1981-05-12 United Kingdom Atomic Energy Authority Particle-in-gas filtration
US4243486A (en) * 1977-09-29 1981-01-06 Delbag-Luftfilter Gmbh Method of mounting filter elements and mounting therefor
US4247315A (en) * 1977-12-12 1981-01-27 Delbag-Luftfilter Gmbh Filter element
US4334900A (en) * 1980-01-11 1982-06-15 Delbag-Luftfilter Gmbh Filter elements arranged in waste tanks for separating substances which are harmful to the health from flowing air in connection with nuclear installations
US5510194A (en) * 1989-07-05 1996-04-23 Alabama Cryogenic Engineering, Inc. Perforated plate filter media and related products
US6149699A (en) * 1992-12-14 2000-11-21 Grantham; James I. Method and apparatus relating to disposable filter modules for filtering air containing hazardous substances
US5417729A (en) * 1993-07-08 1995-05-23 Nfs Radiation Protection Systems Portable modular air cleaning system
US5516349A (en) * 1994-05-05 1996-05-14 Pyradia, Inc. Modular dust collector
EP1041004A1 (en) * 1999-03-30 2000-10-04 Hosokawa Micron B.V. Changing system for carrier with tubing foil for filling machines
US6585792B2 (en) * 2001-02-20 2003-07-01 Donaldson Company, Inc. Air filtering system having easily removable and replaceable filter element, and methods
US20080072554A1 (en) * 2006-09-27 2008-03-27 Mann & Hummel Gmbh Filter Apparatus Especially for Filtration of Combustion Air in Internal Combustion Engines
US7799110B2 (en) * 2006-09-27 2010-09-21 Mann+Hummel Gmbh Filter apparatus especially for filtration of combustion air in internal combustion engines
US11492582B2 (en) 2010-02-22 2022-11-08 Life Technologies Corporation Heat exchanger system with flexible bag
US10711233B2 (en) 2010-02-22 2020-07-14 Life Technologies Corporation Heat exchanger system with flexible bag
US12012579B2 (en) 2010-02-22 2024-06-18 Life Technologies Corporation Heat exchanger system with flexible bag
US10688429B2 (en) * 2014-03-21 2020-06-23 Life Technologies Corporation Gas filter systems for fluid processing systems
US11229855B2 (en) 2014-03-21 2022-01-25 Life Technologies Corporation Condenser systems for processing a fluid
US11554335B2 (en) 2014-03-21 2023-01-17 Life Technologies Corporation Methods for gas filteration in fluid processing systems
US11717768B2 (en) 2014-03-21 2023-08-08 Life Technologies Corporation Condenser bag for processing a fluid
US12076681B2 (en) 2014-03-21 2024-09-03 Life Technologies Corporation Methods for gas filtration in fluid processing systems
US12285713B2 (en) 2014-03-21 2025-04-29 Life Technologies Corporation Condenser bag for processing a fluid
US11685886B2 (en) 2014-10-07 2023-06-27 Life Technologies Corporation Regulated vacuum off-gassing of gas filter for fluid processing system and related methods
US10822582B2 (en) 2014-10-07 2020-11-03 Life Technologies Corporation Regulated vacuum off-gassing of gas filter for fluid processing system and related methods
US12188000B2 (en) 2014-10-07 2025-01-07 Life Technologies Corporation Regulated vacuum off-gassing of gas filter for fluid processing system and related methods
US10967145B2 (en) 2015-03-31 2021-04-06 Koninklijke Philips N.V. Filter assembly and airway pressure support system employing same
US11878122B2 (en) 2015-03-31 2024-01-23 Koninklijke Philips N.V. Filter assembly and airway pressure support system employing same
US11268056B2 (en) 2015-12-29 2022-03-08 Life Technologies Corporation Flexible bioprocessing container with partial dividing partition
US12226561B2 (en) 2015-12-29 2025-02-18 Life Technologies Corporation Magnetic particle separation system with flexible bioprocessing container

Also Published As

Publication number Publication date
DE1757388B1 (de) 1971-10-28
FR1600315A (enrdf_load_stackoverflow) 1970-08-28
GB1238370A (enrdf_load_stackoverflow) 1971-07-07
CH500750A (de) 1970-12-31

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