Patent US3688477A successfully refreshed from Google Patents.
US3688477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air distribution/filtration device for clean rooms
Assignee: Individual
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Filing: 1970-07-01
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Granted: 1972-09-05
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Expires: 1990-07-01
Abstract
Abstract An air distribution/filtration device containing a removable filter and a deflector plate combination used for supplying clean filtered air to such rooms as laboratories and ''''white'''' rooms. The filter is installed on the air leaving side of the deflector plate combination section providing the required filtration just prior to the air entering the work area. The unit is preferably ceiling mounted, but may be also installed on a side wall or on a portable clean bench. Should requirements dictate this unit may be used with a return air plenum located below the work room floor so that the conditioned air may be tempered, re-filtered and returned to the clean work area.
Inventors
- 👤 Charles Coward Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/003; F24F8/00; F24F8/10; F24F8/108
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A self contained air distribution/filtration device comprising a. an air inlet consisting of an inlet duct terminating within a substantially elongated rectangular pressure chamber b. an adjustable rotatable flat air deflector plate being movably attached to said inlet duct, located within said pressure plenum and equipped with means for moving said deflector plate toward or away from said inlet duct to control the volume and pattern of air: c. a filter enclosure integrally attached to said pressure chamber and located on the air discharge side of said deflector plate, said filter enclosure containing a filter and a means of removably sealing said filter to said pressure chamber in a leak proof manner; d. a means for providing air to said inlet duct.
Claim 2
Dependent Claim
122 words
A self contained air distribution/filtration device comprising a. an air inlet consisting of an inlet duct terminating within a substantially elongated rectangular pressure chamber b. an adjustable rotatable flat air deflector plate being movably attached to said inlet duct, located within said pressure plenum and equipped with means for moving said deflector plate toward or away from said inlet duct to control the volume and pattern of air: c. a filter enclosure integrally attached to said pressure chamber and located on the air discharge side of said deflector plate, said filter enclosure containing a filter and a means of removably sealing said filter to said pressure chamber in a leak proof manner; d. a means for providing air to said inlet duct.
Claim 3
Dependent Claim
66 words
An apparatus as described in claim 1 in which means for controlling said deflector plate includes a. flexible cable fixedly attached to said deflector plate describing a path around said filter and terminating at one end of the exterior face of said filter enclosure b. said flexible cable having a rotatable knob attached to end of said flexible cable in order to rotate said deflector plate.
Claim 4
Dependent Claim
42 words
An apparatus as described in claim 1 in which means for controlling said deflector plate includes a. means for rotating said deflector plate fixedly attached to said deflector plate, proceeding through said filter and terminating below the exterior face of said filter.
Claim 5
Dependent Claim
19 words
An apparatus as described in claim 1 which includes a decorative screen protecting the exterior face of said filter.
Claim 6
Dependent Claim
22 words
An apparatus as described in claim 1 which includes an air inlet located on the side of said rectangular elongated pressure chamber;
Claim 7
Dependent Claim
58 words
An apparatus as described in claim 1 which includes a clamp means consisting of a. a metallic shape fixedly attached to said filter enclosure, b. said metallic shape being provided with a threaded means of holding a rotatable fastener in such a position as to removably clamp said filter to said pressure chamber in a leak tight manner.
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |