US5651811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter system
Assignee: HMI Industries Inc
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Filing: 1996-04-15
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Granted: 1997-07-29
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Expires: 2016-04-15
Abstract
Abstract A vacuum cleaner having a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary mechanism driven by the motor for creating a vacuum in the chamber, an outlet for exhausting air from the chamber, which air flows in a selected path from the air inlet, through the chamber and out the air exhaust outlet and a disposable porous sheet filter layer in the chamber for removing solids particles from the air. The vacuum cleaner also has a fiber filter between the filter layer and the motor where the fiber filter has an electrically charged non-woven material for removing very fine air particles in the chamber, intersecting the air path and generally coterminous with the disposable filter layer.
Inventors
- 👤 Robert A. Frey
- 👤 Philip H. Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/125; A47L9/16; A47L9/1658; A47L9/1666; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D46/00; B01D46/10; B01D46/24; B01D46/2403; B01D46/54; B01D46/56; B01D46/62; B01D50/00; B01D50/20; B03; B03C; B03C3/00; B03C3/28; B32B3/00; B32B3/02; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; B01D2239/00; B01D2239/04; B01D2239/0407; B01D2239/0435; B01D2239/0464; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/065; B01D2239/0654; B01D2239/0677; B01D2239/12; B01D2239/1291; B01D2273/00; B01D2273/30; B01D2275/00; B01D2275/10; B01D2275/20; B01D2275/201; B01D2279/00; B01D2279/55; B32B2307/00; B32B2307/40; B32B2307/42; B32B2307/70; B32B2307/724; B32B2432/00; Y; Y10; Y10S; Y10S55/00; Y10S55/39
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
111 words
A particle removing filter for removing particles from air passing through the filter, said filter comprising at least one layer of electrically charged fiber material substantially encapsulated between at least two layers of support material, said at least one layer of electrically charged fiber material and said at least two layers of support material connected together by at least two melted seams, said one melted seam positioned substantially at the peripheral edge along the entire periphery of said filter, said second melted seam positioned along the entire periphery of said filter and spaced inwardly from said one melted seam, said melted seams forming a substantially airtight barrier between said filter layers.
Claim 2
Dependent Claim
111 words
A particle removing filter for removing particles from air passing through the filter, said filter comprising at least one layer of electrically charged fiber material substantially encapsulated between at least two layers of support material, said at least one layer of electrically charged fiber material and said at least two layers of support material connected together by at least two melted seams, said one melted seam positioned substantially at the peripheral edge along the entire periphery of said filter, said second melted seam positioned along the entire periphery of said filter and spaced inwardly from said one melted seam, said melted seams forming a substantially airtight barrier between said filter layers.
Claim 3
Dependent Claim
47 words
A filter as defined in claim 1, wherein said filter including a plurality of layers of electrically charged fiber material substantially encapsulated between at least two layers of support material and at least one layer of support material disposed between two layers of electrically charged fiber material.
Claim 4
Dependent Claim
22 words
A filter as defined in claim 1, wherein said filter including at least three layers of said electrically charged material fiber material.
Claim 5
Dependent Claim
22 words
A filter as defined in claim 2, wherein said filter includes at least three layers of said electrically charged material fiber material.
Claim 6
Dependent Claim
23 words
A filter as defined in claim 1, wherein said electrically charged fiber material is non-woven and includes a high molecular weight, non-polar material.
Claim 7
Dependent Claim
23 words
A filter as defined in claim 4, wherein said electrically charged fiber material is non-woven and includes a high molecular weight, non-polar material.
Claim 8
Dependent Claim
15 words
A filter is defined in claim 5, wherein said electrically charged fiber material includes polypropylene.
Claim 9
Dependent Claim
15 words
A filter as defined in claim 6, wherein said electrically charged fiber material includes polypropylene.
Claim 10
Dependent Claim
32 words
A filter as defined in claim 1, wherein said support material is substantially absent charged fibers and includes a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof.
Claim 11
Dependent Claim
32 words
A filter as defined in claim 2, wherein said support material is substantially absent charged fibers and includes a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof.
Claim 12
Dependent Claim
32 words
A filter as defined in claim 5, wherein said support material is substantially absent charged fibers and includes a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof.
Claim 13
Dependent Claim
32 words
A filter as defined in claim 6, wherein said support material is substantially absent charged fibers and includes a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof.
Claim 14
Dependent Claim
15 words
A filter as defined in claim 1, wherein said filter is substantially conical in shape.
Claim 15
Dependent Claim
15 words
A filter as defined in claim 11, wherein said filter is substantially conical in shape.
Claim 16
Dependent Claim
17 words
A filter as defined in claim 12, wherein said particle removing filter is substantially conical in shape.
Claim 17
Dependent Claim
23 words
A filter as defined in claim 1, wherein each layer of said charged fiber material has a weight of 60-150 gm/m 2 .
Claim 18
Dependent Claim
23 words
A filter as defined in claim 14, wherein each layer of said charged fiber material has a weight of 60-150 gm/m 2 .
Claim 19
Dependent Claim
23 words
A filter as defined in claim 15, wherein each layer of said charged fiber material has a weight of 60-150 gm/m 2 .
Claim 20
Dependent Claim
22 words
A filter as defined in claim 1, wherein said thickness of each layer of said charged fiber material is substantially the same.
Claim 21
Dependent Claim
22 words
A filter as defined in claim 18, wherein said thickness of each layer of said charged fiber material is substantially the same.
Claim 22
Dependent Claim
16 words
A filter as defined in claim 1, wherein said melted seam formed by an ultra-sonic welder.
Claim 23
Dependent Claim
16 words
A filter as defined in claim 20, wherein said melted seam formed by an ultra-sonic welder.
Claim 24
Dependent Claim
156 words
A particle removing filter for removing a majority of particles which are 0.3 micron or larger from air passing through the filter, said filter substantially conical in shape and including at least one layer of electrically charged fiber material substantially encapsulated between at least two layers of support material, each layer of said electrically charged fiber material including non-woven polyproplyene fibers and having a weight of 60-150 gm/m 2 and an ASHRAE 51.1: Initial Atmospheric Dust Spot Efficiency at 40 ft/min of at least about 80, said support material including substantially non-electrically charged fibers and including a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof, and said layers of said electrically charged fiber material and said support material connected together by at least one melted seam positioned substantially at the peripheral edge along the entire periphery of said filter, said melted seam forming a substantially airtight barrier between said filter layers.
Claim 25
Dependent Claim
156 words
A particle removing filter for removing a majority of particles which are 0.3 micron or larger from air passing through the filter, said filter substantially conical in shape and including at least one layer of electrically charged fiber material substantially encapsulated between at least two layers of support material, each layer of said electrically charged fiber material including non-woven polyproplyene fibers and having a weight of 60-150 gm/m 2 and an ASHRAE 51.1: Initial Atmospheric Dust Spot Efficiency at 40 ft/min of at least about 80, said support material including substantially non-electrically charged fibers and including a material selected from the group consisting of polyester, cotton, nylon and mixtures thereof, and said layers of said electrically charged fiber material and said support material connected together by at least one melted seam positioned substantially at the peripheral edge along the entire periphery of said filter, said melted seam forming a substantially airtight barrier between said filter layers.
Claim 26
Dependent Claim
47 words
A filter as defined in claim 23, wherein said filter including a plurality of layers of electrically charged fiber material substantially encapsulated between at least two layers of support material and at least one layer of support material disposed between two layers of electrically charged fiber material.
Claim 27
Dependent Claim
33 words
A filter as defined in claim 23, wherein said filter includes a second melted seam spaced inwardly from said at least one melted seam positioned substantially at said peripheral edge of said filter.
Claim 28
Dependent Claim
22 words
A filter as defined in claim 24, wherein said filter means includes a second melted seam spaced inwardly from said edge seam.
Claim 29
Dependent Claim
22 words
A filter as defined in claim 23, wherein said thickness of each layer of said charged fiber material is substantially the same.
Claim 30
Dependent Claim
22 words
A filter as defined in claim 25, wherein said thickness of each layer of said charged fiber material is substantially the same.
Claim 31
Dependent Claim
22 words
A filter as defined in claim 26, wherein said thickness of each layer of said charged fiber material is substantially the same.
Claim 32
Dependent Claim
21 words
A filter as defined in claim 23, wherein said filter includes at least three layers of said electrically charged fiber material.
Claim 33
Dependent Claim
21 words
A filter as defined in claim 29, wherein said filter includes at least three layers of said electrically charged fiber material.
Claim 34
Dependent Claim
16 words
A filter as defined in claim 23, wherein said melted seam formed by an ultra-sonic welder.
Claim 35
Dependent Claim
16 words
A filter as defined in claim 31, wherein said melted seam formed by an ultra-sonic welder.
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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) | 2000-07-28 | 2001-01-27 | 2001-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-28 | 2005-01-27 | 2005-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-28 | 2009-01-27 | 2009-07-29 | $7700.00 | Window Closed / Lapsed |