US5094676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter/fan assembly
Assignee: Individual
•
Filing: 1990-05-03
•
Granted: 1992-03-10
•
Expires: 2010-05-03
Abstract
Abstract A filter and fan assembly utilizes a conventional ceiling fan having a motor and an upstanding tubular member above the motor which carries electrical wires to the motor. A collar concentrically positioned on the tubular member includes radially extending support members, each of which supports a radially extending horizontal arm. At the end of each such arm is attached, a vertically extending support member. A shallow cylindrical shroud is carried on the vertically extending support members, with the shroud extending a limited distance above the radially extending arms. A plurality of trays having porous bottoms are supported on the arms and contain a filter medium including a layer of activated charcoal granules covered by a membrane of polyester filaments. A second embodiment utilizes a split collar which is bolted around the upstanding tubular member. The fan is normally operated to pull air downwardly through the filter medium.
Inventors
- 👤 Michael H. Karbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0446; B01D50/00; F; F24; F24F; F24F13/00; F24F13/28; F24F7/00; F24F7/007; B01D2253/00; B01D2253/10; B01D2253/102; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; B01D2259/45; B01D2259/4508; F24F2221/00; F24F2221/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
223 words
A filter and fan assembly comprising a ceiling fan having a motor and a motor housing, a plurality of blades driven by said motor, a hollow vertical shaft extending above the axis of said fan and attached to said motor housing and electrical wires carried in said hollow vertical shaft connected to said motor; a concentric sleeve carried on said shaft and a plurality of hollow radially extending supports attached to said sleeve normal to the axis of said shaft; a plurality of support rods each having a flat upper side of substantial width, one carried in each of said supports, and a flat vertically extending member attached to the outboard end of each of said support rods a small distance outside of said fan blades; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on said upper sides of said support rods and having a flat porous bottom to enable the passage of air therethrough; a filter medium carried in said trays such that when said fan is operated, air containing contaminants is directed through said filter medium; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter medium including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 2
Dependent Claim
223 words
A filter and fan assembly comprising a ceiling fan having a motor and a motor housing, a plurality of blades driven by said motor, a hollow vertical shaft extending above the axis of said fan and attached to said motor housing and electrical wires carried in said hollow vertical shaft connected to said motor; a concentric sleeve carried on said shaft and a plurality of hollow radially extending supports attached to said sleeve normal to the axis of said shaft; a plurality of support rods each having a flat upper side of substantial width, one carried in each of said supports, and a flat vertically extending member attached to the outboard end of each of said support rods a small distance outside of said fan blades; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on said upper sides of said support rods and having a flat porous bottom to enable the passage of air therethrough; a filter medium carried in said trays such that when said fan is operated, air containing contaminants is directed through said filter medium; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter medium including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 3
Dependent Claim
22 words
A filter and fan assembly as claimed in claim 1 wherein said filter medium includes a layer of granules of activated charcoal.
Claim 4
Dependent Claim
29 words
A filter and fan assembly as claimed in claim 2 wherein said layer of granules of activated charcoal are covered with a porous filament membrane of washable polyester material.
Claim 5
Dependent Claim
35 words
A filter and fan assembly as claimed in claim 1 wherein additional support means are provided for said trays including a plurality of inwardly extending projections fastened to said shroud between said vertically extending members.
Claim 6
Dependent Claim
27 words
A filter and fan assembly as claimed in claim 1 wherein said support rods carry upwardly extending tabs centered on said flat side for locating said trays.
Claim 7
Dependent Claim
49 words
A filter and fan assembly as claimed in claim 1 wherein said shroud is formed of a plurality of separate rectangular pieces of aluminum sheet which are fastened to said vertically extending members and bowed to form a cylindrical shroud which is spaced from the ends of said blades.
Claim 8
Dependent Claim
36 words
A filter and fan assembly as claimed in claim 4 wherein said inwardly extending projections include rubber sleeve carried on bolts fastened to said shroud and said trays are in part supported on said resilient members.
Claim 9
Dependent Claim
214 words
For use with a ceiling fan having a motor and motor housing, a plurality of blades driven by the motor, a hollow vertical shaft extending above the axis of said fan and attached to said motor housing and electrical wires carried in said hollow vertical shaft and connected to said motor; a filter assembly including a concentric sleeve carried on said shaft and a plurality of hollow radially extending supports attached to said sleeve; a plurality of support rods each having a flat upper surface, one carried in each of said supports, and a vertically extending member attached to the outboard end of each of said support rods a small distance outside of said fan blades; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on the flat upper surface of said support rods and having a flat porous bottom to enable the passage of air therethrough; a filter medium carried in said trays such that when said fan is operated, air containing contaminants is directed through said filter medium; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter medium including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 10
Dependent Claim
214 words
For use with a ceiling fan having a motor and motor housing, a plurality of blades driven by the motor, a hollow vertical shaft extending above the axis of said fan and attached to said motor housing and electrical wires carried in said hollow vertical shaft and connected to said motor; a filter assembly including a concentric sleeve carried on said shaft and a plurality of hollow radially extending supports attached to said sleeve; a plurality of support rods each having a flat upper surface, one carried in each of said supports, and a vertically extending member attached to the outboard end of each of said support rods a small distance outside of said fan blades; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on the flat upper surface of said support rods and having a flat porous bottom to enable the passage of air therethrough; a filter medium carried in said trays such that when said fan is operated, air containing contaminants is directed through said filter medium; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter medium including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 11
Dependent Claim
32 words
A filter and fan assembly as claimed in claim 8 wherein said concentric sleeve is axially split into two halves and means are provided for fastening said halves together around said shaft.
Claim 12
Dependent Claim
33 words
A filter and fan assembly as claimed in claim 9 wherein said fan shroud includes a plurality of internal fastening and support means for supporting said fan shroud on said vertically extending members.
Claim 13
Dependent Claim
20 words
A filter and fan assembly as claimed in claim 9 wherein said filter medium comprises a layer containing activated charcoal.
Claim 14
Dependent Claim
162 words
A filter and fan assembly comprising a ceiling fan having a motor and motor housing, a plurality of blades driven by said motor, and a shaft attached to said motor housing extending above the fan along its axis; a concentric sleeve carried on said shaft and a plurality of radially extending supports attached to said sleeve, a plurality of support rods secured to said supports, and a vertically extending member attached to the outboard ends of each of said support rods; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on said support rods and having a flat porous bottom to enable the passage of air; granular filter means carried in said trays; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter means; said raising and lowering means including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 15
Dependent Claim
162 words
A filter and fan assembly comprising a ceiling fan having a motor and motor housing, a plurality of blades driven by said motor, and a shaft attached to said motor housing extending above the fan along its axis; a concentric sleeve carried on said shaft and a plurality of radially extending supports attached to said sleeve, a plurality of support rods secured to said supports, and a vertically extending member attached to the outboard ends of each of said support rods; a fan shroud fastened to said vertically extending members; a plurality of trays each having edges carried on said support rods and having a flat porous bottom to enable the passage of air; granular filter means carried in said trays; and means attached to said shaft for raising and lowering said assembly to facilitate replacing said filter means; said raising and lowering means including a pulley and a support line carried on said pulley for carrying the weight of said assembly.
Claim 16
Dependent Claim
33 words
A filter and fan assembly as claimed in claim 12 wherein said trays are each generally shaped like the sector of a circle with upwardly extending walls to retain said granular filter means.
Claim 17
Dependent Claim
25 words
A filter and fan assembly as claimed in claim 12 wherein said support rods include a flat surface at the top for supporting said trays.
Claim 18
Dependent Claim
30 words
A filter and fan assembly as claimed in claim 13 wherein said trays include a layer of loose granules of activated charcoal covered with a porous membrane of washable polyester.
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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) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |