US5269824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filtering device
Assignee: NEC Corp
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Filing: 1993-03-25
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Granted: 1993-12-14
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Expires: 2013-03-25
Abstract
Abstract A generally flat air filtering device for an optical disk drive is disclosed. As air is sucked into the disk drive via an inlet of a filter, a filter mat included in the filter removes dust and other impurities from the air. The purified air comes out of the outlet of a tube and then enters and cools an optical disk unit. The filter mat has a generally V-shaped section and, therefore, has a filtering area great enough to enhance efficient dust collection as well as the service life of the filter. To isolate the purified air from surrounding dust-containing air, an endless projection or rail is provided on the tube to bite into the filter mat which is flexible.
Inventors
- 👤 Kouichi Takita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:06
CPC Classifications
G; G11; G11B; G11B33/00; G11B33/14; G11B33/1446; G11B33/146; B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D2265/00; B01D2265/02; B01D2265/028; B01D2275/00; B01D2275/20; B01D2275/201; B01D2279/00; B01D2279/45
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
141 words
An air filtering device comprising: a body having an air inlet at one end and an air outlet at the other end; a filter having a generally V-shaped section and removably set in said body with an opening thereof located at the same position as said air inlet of said body, said filter comprising a flat filter mat having a generally V-shaped section, filter frame members attached to opposite sides of said filter mat which are parallel to said V-shaped section, and a frame member affixed to said opening of said filter mat for allowing said filter mat to be removably attached to said body; an endless projection extending from inner periphery of said body adjacent to said air inlet toward said filter mat; and support portions provided on the inner periphery of said body for supporting said filter frame members.
Claim 2
Dependent Claim
141 words
An air filtering device comprising: a body having an air inlet at one end and an air outlet at the other end; a filter having a generally V-shaped section and removably set in said body with an opening thereof located at the same position as said air inlet of said body, said filter comprising a flat filter mat having a generally V-shaped section, filter frame members attached to opposite sides of said filter mat which are parallel to said V-shaped section, and a frame member affixed to said opening of said filter mat for allowing said filter mat to be removably attached to said body; an endless projection extending from inner periphery of said body adjacent to said air inlet toward said filter mat; and support portions provided on the inner periphery of said body for supporting said filter frame members.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1, wherein said endless projection comprises a pair of parallel endless projections.
Claim 4
Dependent Claim
32 words
A device as claimed in claim 1, wherein said filter frame members each has a generally U-shaped section and comprises a projection which bites into the V-shaped section of said filter mat.
Claim 5
Dependent Claim
166 words
An air filtering device comprising: a body having an air inlet at one end and an air outlet at the other end; a filter having a generally V-shaped section and removably set in said body with an opening thereof located at the same position as said air inlet of said body, said filter comprising a flat filter mat having a generally V-shaped section, filter frame members attached to opposite sides of said filter mat which are parallel to said V-shaped section, and a frame member affixed to said opening of said filter mat for allowing said filter mat to be removably attached to said body; an endless projection extending from inner periphery of said body adjacent to said air inlet toward said filter mat; a support member located at two positions in said body to extend along said filter frame members for supporting said filter frame; and a straight projection associated with said support members to extend in an intended direction of insertion of said filter.
Claim 6
Dependent Claim
166 words
An air filtering device comprising: a body having an air inlet at one end and an air outlet at the other end; a filter having a generally V-shaped section and removably set in said body with an opening thereof located at the same position as said air inlet of said body, said filter comprising a flat filter mat having a generally V-shaped section, filter frame members attached to opposite sides of said filter mat which are parallel to said V-shaped section, and a frame member affixed to said opening of said filter mat for allowing said filter mat to be removably attached to said body; an endless projection extending from inner periphery of said body adjacent to said air inlet toward said filter mat; a support member located at two positions in said body to extend along said filter frame members for supporting said filter frame; and a straight projection associated with said support members to extend in an intended direction of insertion of said filter.
Claim 7
Dependent Claim
17 words
A device as claimed in claim 4, wherein said straight projection comprises a pair of parallel projections.
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) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |