US4846859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: Nitta Corp
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Filing: 1988-09-01
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Granted: 1989-07-11
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Expires: 2008-09-01
Abstract
Abstract An air cleaner comprising a thin lightweight fan module having at least one fan, at least one casing containing one fan therein and at least one housing containing one casing therein; a thin lightweight air filter module having an air filter; and an air flow moderator disposed between the fan module and the air filter module.
Inventors
- 👤 Koji Nobiraki
- 👤 Yoshiharu Metoku
- 👤 Hisato Uragami
- 👤 Toshitaka Tamaki
- 👤 Keiji Yoshimura
- 👤 Kazuhiko Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/10; B01D46/42; B01D46/4236; B01D46/52; B01D46/521; B01D46/56; B01D46/58; F24F13/24; B01D2273/00; B01D2273/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
An air cleaner comprising a thin lightweight fan module including a housing having an inlet, an outlet, at least one fan, and at least one casing containing said at least one fan therein; a thin light weight air filter module in said housing adjacent said outlet and having an air filter; and an air flow moderator plate disposed between three walls of the housing and connected thereto to define a flow path between the fan and plate and the plate and the air filter, said housing of the fan module being provided with vibration and noise absorbers.
Claim 2
Dependent Claim
97 words
An air cleaner comprising a thin lightweight fan module including a housing having an inlet, an outlet, at least one fan, and at least one casing containing said at least one fan therein; a thin light weight air filter module in said housing adjacent said outlet and having an air filter; and an air flow moderator plate disposed between three walls of the housing and connected thereto to define a flow path between the fan and plate and the plate and the air filter, said housing of the fan module being provided with vibration and noise absorbers.
Claim 3
Dependent Claim
14 words
An air cleaner according to claim 1, wherein said fan is a propeller-type fan.
Claim 4
Dependent Claim
14 words
An air cleaner according to claim 1, wherein said fan is a sirocco fan.
Claim 5
Dependent Claim
22 words
An air cleaner according to any one of claims 1-3, wherein said fan is provided with a resonance preventor at its back.
Claim 6
Dependent Claim
14 words
An air cleaner according to claim 4, wherein said resonance preventor is a flywheel.
Claim 7
Dependent Claim
139 words
An air cleaning system comprising: (1) a latticework of interconnected H-shaped channels having their openings directed upwardly and a sealing liquid positioned therein, (2) a plurality of air filter modules, each of which includes an air filter and has a surrounding frame containing a continuous U-shaped channel; said U-shaped channel having an upwardly directed opening and a sealing liquid positioned therein, and said upward opening of said U-shaped channel receiving the lower rim of said H-shaped channel, and (3) a plurality of fan modules, each of which includes a fan, a casing containing said fan therein and a housing containing said casing therein, and is disposed at the back of each of said air filter modules, said fan module having a surrounding frame containing a continnuous vertically disposed extension which rests in the upward opening of said H-shaped channel.
Claim 8
Dependent Claim
139 words
An air cleaning system comprising: (1) a latticework of interconnected H-shaped channels having their openings directed upwardly and a sealing liquid positioned therein, (2) a plurality of air filter modules, each of which includes an air filter and has a surrounding frame containing a continuous U-shaped channel; said U-shaped channel having an upwardly directed opening and a sealing liquid positioned therein, and said upward opening of said U-shaped channel receiving the lower rim of said H-shaped channel, and (3) a plurality of fan modules, each of which includes a fan, a casing containing said fan therein and a housing containing said casing therein, and is disposed at the back of each of said air filter modules, said fan module having a surrounding frame containing a continnuous vertically disposed extension which rests in the upward opening of said H-shaped channel.
Claim 9
Dependent Claim
17 words
An air cleaning system according to claim 6, wherein said air filter module is thin and lightweight.
Claim 10
Dependent Claim
16 words
An air cleaning system according to claim 6, wherein said fan module is thin and lightweight.
Claim 11
Dependent Claim
15 words
An air cleaning system according to claim 8, wherein said fan is a propeller-type fan.
Claim 12
Dependent Claim
15 words
An air cleaning system according to claim 8, wherein said fan is a sirocco fan.
Claim 13
Dependent Claim
22 words
An air cleaning system according to claim 8, wherein said housing of the fan module is provided with vibration and noise absorbers.
Claim 14
Dependent Claim
21 words
An air cleaning system according to claim 8, wherein said fan is provided with a resonance prevention device at its back.
Claim 15
Dependent Claim
16 words
An air cleaning system according to claim 12, wherein said resonance prevention device is a flywheel.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |