EP0127667B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dust collector
Assignee: Industriell Arbetshygien I Soderhamn AB
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Filing: 1983-12-06
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Granted: 1987-03-11
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Expires: 2003-12-06
Abstract
Abstract PCT No. PCT/SE83/00428 Sec. 371 Date Aug. 9, 1984 Sec. 102(e) Date Aug. 9, 1984 PCT Filed Dec. 6, 1983 PCT Pub. No. WO84/02282 PCT Pub. Date Jun. 21, 1984.A dust collector including two tubes which communicate through an interconnecting conduit. A first tube operates as a cyclone which separates a great fraction of dust or solid components from the incoming air and collects the same in a bag at the bottom of the tube. The second tube includes a filter unit composed of a coarser filter as well as a surrounding fine filter, the filter unit receiving the pre-purified air from the cyclone tube through the interconnecting conduit and separating the remaining dust particles therefrom.
Inventors
- 👤 Anders Krantz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:16
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/102; A47L9/12; A47L9/127; A47L9/14; A47L9/1427; A47L9/1436; A47L9/1445; A47L9/16; A47L9/165; A47L9/1658; A47L9/1683; B; B01; B01D; B01D50/00; B01D50/20; B04; B04C; B04C5/00; B04C5/12; B04C5/13; B04C9/00; B04C2009/002
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
360 words
Dust collector comprising two communicating ' casings or tubes (6, 7) a first one (6) of which contains a conical funnel (15) and is arranged to receive dust-laden air from outside and separate therefrom at least coarser particles or components by collecting these at a bottom of the tube, while the second tube (7) embraces a filter unit (24) including a receptacle forming, filter means and arranged to separate the remaining particles from the pre-purified air arriving from the first tube before the air leaves the collector, the two tubes being interconnected by means of a conduit (11) extending between the tops of the tubes, characterized in that the first tube (6) consists of a cyclone including an air intake duct (9) which is located in the vicinity of the top of the tube and which, in a manner known per se, extends tangentially in relation to the tube so as to set the sucked-in air in a circulating movement directed downwardly towards the bottom of the tube, in which the conical funnel (15) is located between said intake duct and the bottom of the tube, the greatest diameter of the funnel being smaller than the diameter of the tube in order to allow the air to pass between the outside of the funnel and the inside of the tube, said funnel converging upwardly towards the top of the tube so as to pick up at the lower part thereof the pre-purified air flowing up from the bottom of the tube and pass it on to the second tube (7) through said interconnecting conduit (11), and that the filter unit (24) in the second tube (7) includes at least two concentrically in each other arranged bag- or shell-like filter elements (29, 30) the interior one (30) of which serves as a coarse filter first receiving the accepted airfrom the cyclone tube, said element having a relatively loose structure, while the exterior one (29) serves as a fine- or micro-filter having a more compact structure than the coarse filter, said coarse filter and fine filter respectively being mountable as well as dismountable as one single integral unit in said second tube.
Claim 2
Dependent Claim
360 words
Dust collector comprising two communicating ' casings or tubes (6, 7) a first one (6) of which contains a conical funnel (15) and is arranged to receive dust-laden air from outside and separate therefrom at least coarser particles or components by collecting these at a bottom of the tube, while the second tube (7) embraces a filter unit (24) including a receptacle forming, filter means and arranged to separate the remaining particles from the pre-purified air arriving from the first tube before the air leaves the collector, the two tubes being interconnected by means of a conduit (11) extending between the tops of the tubes, characterized in that the first tube (6) consists of a cyclone including an air intake duct (9) which is located in the vicinity of the top of the tube and which, in a manner known per se, extends tangentially in relation to the tube so as to set the sucked-in air in a circulating movement directed downwardly towards the bottom of the tube, in which the conical funnel (15) is located between said intake duct and the bottom of the tube, the greatest diameter of the funnel being smaller than the diameter of the tube in order to allow the air to pass between the outside of the funnel and the inside of the tube, said funnel converging upwardly towards the top of the tube so as to pick up at the lower part thereof the pre-purified air flowing up from the bottom of the tube and pass it on to the second tube (7) through said interconnecting conduit (11), and that the filter unit (24) in the second tube (7) includes at least two concentrically in each other arranged bag- or shell-like filter elements (29, 30) the interior one (30) of which serves as a coarse filter first receiving the accepted airfrom the cyclone tube, said element having a relatively loose structure, while the exterior one (29) serves as a fine- or micro-filter having a more compact structure than the coarse filter, said coarse filter and fine filter respectively being mountable as well as dismountable as one single integral unit in said second tube.
Claim 3
Dependent Claim
87 words
Dust collector according to claim 1, characterized in that the interconnecting conduit (11) projects into the cyclone tube (6) and is arranged to support the conical funnel (15), a plurality of control or guide plates (17) extending within the conduit in the length direction thereof, the purpose of said plates being to break the circulating movement of the accepted air coming into the funnel and transform the same into a laminar movement before the air reaches the tube (7) in which the filter unit (24) is housed.
Claim 4
Dependent Claim
58 words
Dust collector according to claim 1 or 2, characterized in that the filter unit (24) is inserted in a substantially rigid carrier (25) having a plurality of large-sized air-permeable holes and being placed within said second tube, the purpose of said carrier being to keep the filter unit (24) at a distance from the inside of the tube.
Claim 5
Dependent Claim
36 words
Dust collector according to any one of the preceding claims, characterized in that the filter unit (24) includes means (35) for automatically closing the unit in connection with the dismounting thereof from the associated tube (7).
Claim 6
Dependent Claim
160 words
Dust collector according to claim 4, characterized in that a cap (13) for closing said second tube (7) includes a pipe socket (34) projecting into the tube and that the end of the filter unit facing said cap comprises two membranes (36, 37) of a ductile material, e.g. rubber, which are attached to a stiff collar (38) and in which apertures (39, 40) are cut out, said apertures being laterally displaced relative to each other in such a manner that a first one of the membranes - in an unpenetrated condition - covers the aperture in the second one and vice versa, said pipe socket (34) penetrating through the two apertures (39, 40) when the cap (13) is mounted on the tube so as to deform the membranes elastically while securing that these sealingly contact the outside of the pipe socket, the membranes reverting to their covering condition as soon as the pipe socket is pulled out of said apertures.
Claim 7
Dependent Claim
81 words
Dust collector according to any one of the preceding claims, characterized in that a fan or suction device (46) for passing the air through the filter unit (24) is connected to a conduit (48) for conducting the air, which has passed through the fan and thereby been compressend and heated, into a housing (43) surrounding at least one of said tubes (6, 7) so as to heat the tube wall and thereby counteract any condensation of water on the inside thereof.
Claim 8
Dependent Claim
42 words
Dust collector according to claim 6, characterized in that said housing (43) includes a plurality of small holes (49) for dividing the air fed into the housing into a great number of small partial flows before the passage out in the open.
References Cited (Backward Citations)
No citation records indexed.
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