U.S. patent application number 11/286597 was filed with the patent office on 2006-09-07 for concealed portable fan.
This patent application is currently assigned to Lasko Holdings, Inc.. Invention is credited to William E. Lasko, Paul W. Orr, Rodney Wilson.
Application Number | 20060199515 11/286597 |
Document ID | / |
Family ID | 37023217 |
Filed Date | 2006-09-07 |
United States Patent
Application |
20060199515 |
Kind Code |
A1 |
Lasko; William E. ; et
al. |
September 7, 2006 |
Concealed portable fan
Abstract
A stable portable fan capable of generating an exhaust air
stream elevated above a support surface allowing the exhaust air
stream to be directed as desired by the user is provided. The
device includes an air generator assembly located within a
polygonal column generating an exhaust air stream that exiting the
polygonal column. The polygonal column of the device is used to
disguise/conceal the fan.
Inventors: |
Lasko; William E.; (Chester
Springs, PA) ; Orr; Paul W.; (Coatsville, PA)
; Wilson; Rodney; (Wilmington, DE) |
Correspondence
Address: |
WOODCOCK WASHBURN LLP
ONE LIBERTY PLACE, 46TH FLOOR
1650 MARKET STREET
PHILADELPHIA
PA
19103
US
|
Assignee: |
Lasko Holdings, Inc.
Wilmington
DE
|
Family ID: |
37023217 |
Appl. No.: |
11/286597 |
Filed: |
November 23, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10944290 |
Sep 16, 2004 |
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11286597 |
Nov 23, 2005 |
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10347079 |
Jan 17, 2003 |
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10944290 |
Sep 16, 2004 |
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10322169 |
Dec 18, 2002 |
6760543 |
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10347079 |
Jan 17, 2003 |
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10720374 |
Nov 24, 2003 |
6997680 |
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11286597 |
Nov 23, 2005 |
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10431964 |
May 8, 2003 |
6942456 |
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10720374 |
Nov 24, 2003 |
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10347079 |
Jan 17, 2003 |
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10431964 |
May 8, 2003 |
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10322169 |
Dec 18, 2002 |
6760543 |
|
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10347079 |
Jan 17, 2003 |
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60688970 |
Jun 9, 2005 |
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60702802 |
Jul 27, 2005 |
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Current U.S.
Class: |
454/237 |
Current CPC
Class: |
F24F 7/065 20130101;
F24F 2221/12 20130101 |
Class at
Publication: |
454/237 |
International
Class: |
F24F 7/00 20060101
F24F007/00 |
Claims
1. A portable fan comprising: base for engaging a mounting surface;
a plurality of walls connected to said base and extending
substantially vertically upward, wherein said plurality of walls
form a polygonal column; a top connected to a top end of said
polygonal column; an interior space defined by said plurality of
walls and said top; at least one air inlet in said polygonal
column; at least one air outlet located in an upper portion of said
polygonal column; an air generator disposed within said interior
space and in fluid communication with said at least one air inlet
and said at least one air outlet; an intake air stream induced by
said air generator, wherein said intake air stream enters said
interior space via said at least one air inlet; and an exhaust air
stream generated by said air generator, wherein said exhaust air
stream exits said interior space via said at least one air outlet;
wherein said plurality of walls forming said polygonal column are
utilized to substantially cover and protect said air generator when
viewed from a location exterior to said interior space, and wherein
said vertical orientation of said polygonal column raises said
exhaust air stream to an elevation above said support surface.
2. The portable fan of claim 1, wherein said plurality of walls
forming said polygonal column further comprise at least a first
pair of substantially flat walls that are oriented substantially
parallel relative to one another.
3. The portable fan of claim 2, wherein said plurality of walls
forming said polygonal column further comprise at least a second
pair of substantially flat walls that are substantially parallel
relative to one another and oriented substantially orthogonal to
said first pair of parallel walls.
4. The portable fan of claim 1, wherein said plurality of walls
forming said polygonal column further comprise: a front wall having
said at least one air outlet; a rear wall located opposite said
front wall; and side walls disposed between said front wall and
said rear wall, wherein said side walls are substantially
orthogonal to said front wall and said rear wall.
5. The portable fan of claim 1, wherein said plurality of walls
forming said polygonal column further comprise separate walls that
are formed as individual, substantially flat pieces, wherein said
separate walls are shipped disconnected from one another, and
wherein said separate walls are connected together to form said
polygonal column during operation of said portable fan.
6. The portable fan of claim 1, further comprising corner
connecting pieces for connecting adjacent walls together.
7. The portable fan of claim 6, wherein corner pieces further
comprise slots, wherein side edges of said separate walls are
inserted into said slots in said corner connecting pieces, and
wherein said connection of said separate walls to said corner
connecting pieces does not use separate fasteners.
8. The portable fan of claim 6, wherein said separate walls are
connected to said corner connecting pieces by a snap-fit
connection, and wherein said connection of said separate walls to
said corner connecting pieces does not use separate fasteners.
9. The portable fan of claim 6, further comprising fasteners for
connecting said walls to said corner connecting pieces, wherein
each of said separate walls include one or more holes along
vertical edges of said walls for receiving one of said fasteners,
and wherein said corner connecting pieces comprise corresponding
holes for receiving said fasteners to connect said walls and said
corner connecting pieces.
10. The portable fan of claim 6, wherein said corner connecting
pieces are formed along one edge of said walls and wherein said
walls further comprise a mating edge, wherein said corner
connecting piece and said mating edge of adjacent walls are coupled
together to connect said walls.
11. The portable fan of claim 6, wherein said corner connecting
pieces extend along a length of said side edge of said walls.
12. The portable fan of claim 6, wherein said corner connecting
pieces further comprise L-shaped brackets, wherein an angle of said
L-shaped bracket is determined by dividing about 360 degrees by the
number of sides of said polygonal column.
13. The portable fan of claim 1, wherein one or more of said
plurality of walls further comprises two distinct surfaces, wherein
at least one of said walls is reversible to selectively expose one
of said distinct surfaces as an exterior surface of said polygonal
column.
14. The portable fan of claim 1, wherein at least two of said
plurality of walls are identical and interchangeable with one
another in an assembly of said portable fan.
15. The portable fan of claim 1, wherein said plurality of walls
are at least partially constructed of one or more of: wood,
plastic, metal, and/or fabric.
16. The portable fan of claim 1, further comprises an oscillation
mechanism wherein said oscillation mechanism moves said exhaust air
stream horizontally side to side as it exits said polygonal column
via said at least one air outlet opening.
17. The portable fan of claim 16, further comprising a rotatable
air transfer plenum disposed within said interior space of said
polygonal column, wherein said rotational movement of said exhaust
air stream is absent a movement of said polygonal column.
18. The portable fan of claim 17, wherein said rotational movement
of said air transfer plenum is substantially concealed by said
plurality of walls of said polygonal column.
19. The portable fan according to claim 17, further comprising
electrical wires and electrical connections, wherein said
electrical wires and/or said electrical connections are
substantially stationary during said rotation of said air transfer
plenum and said movement of said exhaust air stream.
20. The portable fan of claim 17, further comprising air alignment
elements disposed between said air transfer plenum and said air
outlet, wherein said air alignment elements extend in a direction
substantially radial from an axis of rotation of said air transfer
plenum.
21. The portable fan of claim 20, wherein said air alignment
elements define an oscillation angle, wherein said air transfer
plenum rotates side to side to provide a cooling effect on a user
located within an area covered by oscillation of exhaust air stream
through said oscillation angle.
22. The portable fan of claim 20, further comprising a grill
located proximate said at least one air outlet, wherein said air
alignment elements further comprise front edges that forms said
grill.
23. The portable fan of claim 20, further comprising a grill
located proximate said at least one air outlet, wherein said air
alignment elements further comprise a rear edge of said grill,
wherein said rear edge comprises a concave shape corresponds to an
arc defined by an outlet of said air transfer plenum as said air
transfer plenum rotates about said axis of rotation.
24. The portable fan of claim 20, wherein said air alignment
elements disposed between said air transfer plenum and said air
outlet are formed as part of said polygonal column.
25. The portable fan according to claims 1, further comprising a
weather proof construction comprising one or more of: a rain
sensor, water proof materials, a sealed housing, sealed motors,
and/or sealed switches.
26. The portable fan of claim 1, further comprising a light
source.
27. The portable fan of claim 26, wherein said light source
comprises a light emitting diode.
28. The portable fan of claim 27, wherein said light source further
comprises a polymer plate used to distribute light emitted from
said light emitting diode.
29. The portable fan of claim 1, further comprising an electrical
receptacle.
30. The portable fan according to claims 1, further comprising an
air filtration element disposed proximate said at least one air
inlet.
31. The portable fan of claim 30, wherein said air filtration
element further comprises a photo catalyst substance and an
ultraviolet ray generator used to excite said photo catalyst
substance.
32. The portable fan of claim 30, wherein inlet air is drawn into
said internal space through said air filtration element.
33. The portable fan according to claims 1, further comprising a
non-operating configuration wherein said plurality of walls are
disassembled from one another and disassembled from said base and
said top and disposed within a shipping package.
34. The portable fan of claim 33, wherein in said shipping package
said plurality of walls are one of: stacked beside one another
and/or stacked on top of one other to further conserve space in
said shipping package.
35. The portable fan of claim 1, wherein said plurality of walls
are readily disassembled from one another, and wherein one or more
of said plurality of walls are: (i) replaceable with one or more
different walls; (ii) interchangeable with another of said
plurality of walls; (iii) reverseable to have another surface of
said plurality of walls showing to an exterior of said portable
fan, wherein said plurality of walls are disassembled and
reassembled in order to change an appearance of said portable
fan.
36. The portable fan of claim 1, further comprising a maximum
velocity of said exhaust air stream measured about 8 feet from said
air outlet wherein said maximum velocity of about 500 feet per
minute or greater.
37. The portable fan of claim 1, further comprising a maximum
thrust in a direction substantially opposite to a direction of the
flow of said exhaust air stream as said exhaust air stream exits
said air outlet, wherein said maximum thrust of about 1.0 pound of
force or less.
38. The portable fan of claim 1, further comprising a velocity to
thrust ratio, wherein a maximum velocity of said exhaust air stream
measured about 8 feet from said air outlet divided by a maximum
thrust generated by said exhaust air stream in a direction
substantially opposite to the direction of the flow of said exhaust
air stream as it exits said air outlet is about 500:1 or
greater.
39. A concealed portable fan comprising: a base; side walls
extending vertically upward from said base, said sidewalls each
comprising a bottom edge, a top edge, and side edges; a top
proximate said top edges of said side walls forming a vertically
oriented polygonal column; at least a first pair of said side walls
being substantially flat and substantially parallel relative to one
another; at least one air inlet; at least one air outlet opening
located in an upper portion of said vertically oriented polygonal
column; a first interior space defined by said a vertically
oriented polygonal column; an air generator disposed within a lower
portion said first interior space comprising; a housing; an
impeller disposed within said housing, wherein said air impeller
has a substantially horizontal axis of rotation; a motor for
rotating said impeller; an intake port; an exit port; a transfer
plenum disposed within said first interior space and fluidly
connected to said exit port of said air generator, said transfer
plenum comprising; a plenum wall defining a second interior space;
at least one plenum outlet in said plenum wall; a flow of intake
air induced by said air generator, wherein said flow of intake air
enters said first interior space via said air inlet; and an exhaust
air stream generated by said air generator, wherein said exhaust
air stream exits said first interior space via said air outlet
opening; wherein said vertically oriented polygonal column is
utilized to substantially conceal and/or disguise said air
generator when viewed from a location exterior to said first
interior space.
40. A concealed portable fan comprising: a vertically oriented
polygonal column comprising: a base for engaging a mounting
surface; a top; a vertically oriented cover comprising: multiple
walls extending vertically between said base and said top; at least
a first pair of said multiple walls being substantially flat and
substantially parallel relative to one another; at least one
vertically elongate air inlet in an upper portion of said
vertically oriented cover; at least one vertically elongate air
outlet opening in an upper portion of said vertically oriented
cover; a first interior space defined by said vertically oriented
polygonal column; an air generator disposed within said first
interior space between and in fluid communication with said at
least one vertically elongate air inlet and said at least one
vertically elongate air outlet opening comprising; a cross-flow air
impeller having a substantially vertical axis of rotation; a motor
attached to said cross-flow air impeller, said motor rotating said
impeller about said vertical axis of rotation; a flow of intake air
generated by said air generator entering said interior space via
said at least one vertically elongate air inlet; and an exhaust air
stream generated by said air generator exiting said interior space
via said at least one vertically elongate air outlet opening;
wherein said polygonal column is utilized to substantially conceal
and/or disguise said air generator when viewed from a location
exterior to said interior space.
41. A disguised fan comprising: a base; a plurality of panels
extending substantially vertically upward from said base, said
panels adapted to look similar to a piece of furniture or room
decor; a top at an end of said panels opposite said base; an
interior space defined by said base, said panels, and said top; an
air inlet in at least one of said panels to allow air to enter said
interior space; an air outlet in at least one of said panels to
allow an exhaust air stream to exit said interior space; and an air
blower disposed within said interior space between said air inlet
and said air outlet; wherein said panels further comprises material
provided in numerous patterns and/or colors to match a decor style;
wherein said plurality of panels disguised said fan as a piece of
furniture.
42. The disguised fan of claim 41, wherein said materials of said
panels further comprise at least one of wood, fabric, polymer
and/or metals.
43. The disguised fan of claim 41, further comprising a polygonal
column formed by at least four panels, wherein at least two of said
panels form a first pair of substantially flat walls that are
oriented substantially parallel relative to one another.
44. The disguised fan of claim 43, further comprising least a
second pair of substantially flat walls formed by said panels that
are substantially parallel relative to one another and oriented
substantially orthogonal to said first pair of substantially
parallel, flat walls.
Description
CROSS-REFERENCE APPLICATIONS
[0001] This application claims priority to provisional patent
application 60/688,970 filed Apr. 28, 2005 and provisional patent
application 60/702,802 filed Jul. 27, 2005. This application is
also a Continuation-in-Part of application Ser. No. 10/944,290,
filed Sep. 16, 2004, which is a Continuation-in-Part of application
Ser. No. 10/347,079, filed Jan. 17, 2003, which is a
Continuation-in-Part of application Ser. No. 10/322,169 filed Dec.
18, 2002 now U.S. Pat. No. 6,760,543. This application is also a
Continuation-in-Part of application Ser. No. 10/720,374 filed Nov.
24, 2003, which is a Continuation-in-Part of application Ser. No.
10/431,964, filed May 8, 2003 now U.S. Pat. No. 6,943,256, which is
a Continuation-in-Part of application Ser. No. 10/347,079, filed
Jan. 17, 2003, which is a Continuation-in-Part of application Ser.
No. 10/322,169 filed Dec. 18, 2002 now U.S. Pat. No. 6,760,543.
FIELD OF THE INVENTION
[0002] This invention relates generally to fans. More specifically,
the present invention relates to portable fans that may be
constructed to conceal the fan.
BACKGROUND OF THE INVENTION
[0003] Fans have been used for many years to supplement the indoor
and outdoor comfort level of the user. This is accomplished by the
fan generating a current of air that passes over the skin of an
individual. The current of air serves to increase the convective
heat loss of the body through the natural evaporative process of
moisture (e.g. sweat) on the skin. When natural air movement is not
sufficient to accomplish this evaporation a fan is an effective
means to accelerate the evaporative process.
[0004] There are however several disadvantages to conventional
fans. Non-elevated models that are positioned relatively close to
the ground do not have the ability to effectively cool the upper
body. Likewise non-elevated models do not posses the ability to
project the generated air current over objects such as furniture,
thus impairing the ability to efficiently cool the user.
[0005] The use of pedestals and risers to elevate the generated air
stream also has disadvantages. Conventional fans use axial fan
blades to generate the current of air. Elevated fans with axial fan
blades have large guards, (grills) and the mass of the electric
motor is located at an elevated height. Both of these elements
contribute to the instability of the fan and require a base of
considerable size to stabilize the device during use. The size of
such a base does not permit an optimized space saving design. The
fan may also have an oscillation function, which further
exacerbates the instability of the device. The oscillating function
on conventional fans with axial fan blades also insures that the
fan will be visually obtrusive within the environment.
[0006] Another problem with conventional fans using axial fan
blades is the large volume of air produced by the blade. This
problem manifests itself in three manners. One, the ability to
project a large volume of air at a sufficient velocity, so as to
impinge the skin of the user for the desired cooling effect
requires a motor of substantial power and cost. Two, the thrust
created by projecting a large volume of air at a sufficient
velocity further exacerbates the stability problem of the device.
Three, as the conical shape of the air stream travels away from the
fan the area of coverage grows in diameter. The significant volume
of air combined with the growth in the coverage area of the air
stream may cause objects, (such as napkins, playing cards, etc) to
be dislodged from their intended place.
SUMMARY OF THE INVENTION
[0007] In light of the shortcomings of the prior art, the present
invention is directed to a portable fan using an inventive air
generator design to create a stable elevated air stream and that is
conceal and thus less visually disruptive. The device overcomes
several if not all of the deficiencies of conventional indoor
and/or outdoor fans.
[0008] The concealed portable fan also includes an innovative panel
construction. The use of this panel construction allows further
innovation in materials and styles not presently associated with
conventional fans.
[0009] The panel construction includes
removable/replaceable/interchangeable panels that provide a
portable fan that can be moved from room to room (or from indoor
use to outdoor use) while still being adaptable to a particular
room or environment in which the portable fan is being used. The to
removable/replaceable/interchangeable panels allow the portable fan
to be modified by the user to match surrounding furniture and/or
blend in with the room decor thus further concealing the fan.
[0010] According to one aspect of the invention, the portable fan
includes: a base for engaging a mounting surface, multiple walls
extending vertically upward to form a polygonal column and a top
connected to a top end of said polygonal column.
[0011] According to another aspect of the invention, the polygonal
column defines an interior space.
[0012] According to another aspect of the invention, at least one
air inlet is located in the polygonal column and at least one air
outlet is located in an upper portion of one of the polygonal
column.
[0013] According to yet another aspect of the invention, an air
generator is disposed within the interior space and is in fluid
communication with the air inlet and the air outlet.
[0014] According to another aspect of the invention, an intake air
stream generated by the air generator and enters the interior space
via the air inlet and an exhaust air stream generated by the air
generator and exits the interior space via the air outlet.
[0015] According to another aspect of the invention, the multiple
walls forming the polygonal column are utilized to cover and
protect the air generator when viewed from a location exterior to
the polygonal column.
[0016] According to another aspect of the invention, the vertical
orientation of the polygonal column elevates the exhaust air stream
above the support surface.
[0017] According to another aspect of the invention, the multiple
walls forming the polygonal column include at least a first pair of
substantially flat walls that are oriented substantially parallel
relative to one another.
[0018] According to yet another aspect of the invention, the
multiple walls forming the polygonal column include at least a
second pair of substantially flat walls that are substantially
parallel relative to one another and oriented substantially
orthogonal to the first pair of parallel walls.
[0019] According to another aspect of the invention, the fan is a
disguised fan that uses the polygonal column to look similar to a
piece of furniture or room decor.
[0020] According to another aspect of the invention, the polygonal
column includes material provided in numerous patterns and/or
colors to match furniture and/or a room decor style.
[0021] Additional features and advantages of the invention will be
made apparent from the following detailed description of
illustrative embodiments that proceeds with reference to the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The invention is best understood from the following detailed
description when read in connection with the accompanying drawing.
It is emphasized that, according to common practice, various
features of the drawings are not to scale. On the contrary, the
dimensions of various features are arbitrarily expanded or reduced
for clarity. Included in the drawings are the following
Figures:
[0023] FIG. 1 is a perspective view of an exemplary embodiment of
the portable fan;
[0024] FIGS. 2A-2G are views showing the construction of the
exemplary embodiment of FIG. 1;
[0025] FIGS. 3A-3D illustrate the air flow pattern into, through,
and exiting the exemplary embodiment of FIG. 1;
[0026] FIG. 4 shows an alternative embodiment of a transfer plenum
for the exemplary embodiment of FIG. 2A;
[0027] FIGS. 5A and 5B illustrate two graphs that compare the
thrust and velocity characteristic of a conventional fan and an
embodiment of the portable fan in accordance with the present
invention;
[0028] FIG. 6 shows a perspective view of another exemplary
embodiment of the portable fan of the present invention;
[0029] FIG. 7 shows an exploded view of the exemplary embodiment of
FIG. 6;
[0030] FIG. 8 shows a cross sectional view through the exemplary
embodiment of FIG. 6;
[0031] FIG. 9 shows packaging advantages associated with the
invention;
[0032] FIG. 10 shows additional features added to the present
invention;
[0033] FIGS. 11A-11E illustrate a comparison of the portable fan of
the present invention to conventional fans; and
[0034] FIGS. 12-24 shows additional embodiments of the present
invention.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0035] The following description is of an exemplary portable fan
that generates an elevated air stream. The elevated air stream
allows effectual cooling of the users upper body as well as the
ability to project the air stream over furniture and other objects.
The exemplary portable fan uses a high velocity low thrust air
generator to mitigate the stability problems associated with axial
fan blades. The non-conical shape of the air stream allows a more
precise adjustment of direction when compare to conical shaped air
streams.
[0036] The use of the disclosed air generators provide a compact
design that does not require the use of large protective grills.
Oscillation can be incorporated into the device while being less
visually disruptive than axial fans. The ability to locate the mass
of the motor at a low elevation with respect to a mounting surface
combined with the absence of large grills further enhances the
stability of the device.
[0037] The novel design of the parts and assembly of the portable
fan also increases the opportunity to change the aesthetic
appearance of the device. The sealed construction as described will
enhance the ability to utilize the portable fan indoors or
outdoors. The ability to easily assemble and disassemble the
portable fan facilitates storage and reduces the shipping cost from
the manufacturer to the customer.
[0038] The embodiments described herein provide various
combinations of the above characteristics at a desirable retail
cost for the consumer.
[0039] FIG. 1 shows an exemplary perspective view of portable fan
100 includes a housing having a polygonal column 110. Top 114 is
located at vertical extent of polygonal column 110 and base 116 is
located at the bottom of polygonal column 110. Polygonal column
110, top 114 and base 116 define interior space 113. As shown,
inlet 112 is located in a lower portion of polygonal column 110
while outlet opening 111 are located in an upper portion of
polygonal column 110. As shown, grill 120 is located proximate
outlet opening 111.
[0040] Air generator 130 is disposed within interior space 113 and
draws air into polygonal column 110 via inlet 112. Located
proximate inlet 112 is porous material 118 through which the air
drawn into polygonal column 110 passes. The air is subsequently
expelled from polygonal column through outlet opening 111 and grill
120.
[0041] Portable fan 100 also includes at least one control assembly
170. Control assembly 170 controls one or more functions of
portable fan 100. Also shown is power cord 105, utilized to connect
portable fan 100 to an electrical power source (i.e. wall outlet).
The electrical component connections of portable fan 100 are
integrated within the device, such as for example between control
assembly 170 and air generator 130. The integration of the
electrical component connections within the device eliminates the
need for the user to make such connections. In the exemplary
embodiment shown, for example, only the connection of power cord
105 to an electrical power source is required for operation of the
device. Further, the integration of the electrical component
connections within the device enhances the portability of portable
fan 100, as well as, outdoor use wherein the housing is sealed to
be waterproof.
[0042] Preferably power cord 105 utilizes a safety plug. Details of
the safety plug and it's advantages can be referenced in U.S. Pat.
Nos. 6,394,848; 6,604,965; 6,793,535; and 6,896,544, which are
incorporated herein by reference. These US patents provide a plug
that permits a greater degree of safety for portable fan 100 by
using a non-replaceable circuit interrupter in power cord 105. The
location of the non-replaceable circuit interrupter is preferably
near the interface point of power cord 105 and the power supply,
e.g. a power outlet, such as for example a conventional wall
receptacle. The location of the circuit interrupter protects not
only portable fan 100 but also protects the complete length of
power cord 105.
[0043] Also shown in FIG. 1 is cross section plane 3-3. The
horizontal cross section taken along cross section plane 3-3 is
illustrated in FIG. 3A.
[0044] FIG. 2A is an exploded perspective view of the exemplary
embodiment of portable fan 100 shown in FIG. 1. As shown, base 116
serves to stabilize portable fan 100 on a mounting surface, (not
shown). In the embodiment, shown front panel 110a, rear panel 110b,
side panel 110c and side panel 110d are connected together along
corresponding side edges. Panels 110a, 110b. 110c and 110d are
connected to base 116. As shown, are inlet openings 112a and 112b
formed in side panels 110c and 110d respectively. Outlet opening
111 is located in an upper portion of front panel 110a. Top 114 and
porous material 118 are also shown. Although polygonal column 110
is shown constructed of four separate, substantially flat, panels
the invention is not so limited. It is contemplated that one, two
or more shaped panels could be used to construct polygonal column
110. Shapes such as L-shaped sections, pentagons, hexagons and
octagons could easily be incorporated into the described structure.
It is also contemplated that polygonal column 110 may be
constructed from panels having slightly curved surface, the curved
surface will add structural integrity to polygonal column 110. It
is also contemplated that polygonal column may be constructed from
a combination of flat and curved panels.
[0045] The use of polygonal column 110 constructed of panels such
as 110a, 110b. 110c and 110d will allow a single panel structure to
be used in multiple applications. For example, side panel 110c and
side panel 110d may be identical and require only one manufacturing
tool. The reduction in the number of needed manufacturing tools
will reduce the capitol investment required to initiate
manufacturing portable fan 100.
[0046] Disposed within panels 110a, 110b. 110c and 110d and
preferably connected to base 116 is air generator 130. As shown in
FIG. 2, air generator 130 is a centrifugal air generator and
includes motor 132, housing 138 and foundation 133. Foundation 133
is used to attach air generator 130 to base 116. It is contemplated
that foundation 133 may be unitary with housing 138 and/or base
116. Disposed within housing 138 is at least one impeller 134.
Impeller 134 is rotated by motor 132 and draws inlet air into
housing 138 via at least one inlet port 136. The inlet air is
subsequently accelerated and pressurized by the rotation of
impeller 134 and expelled from housing 138 as an exhaust air stream
via exit port 131.
[0047] Attached to exit port 131 of air generator 130 is adaptor
140. In the exemplary embodiment shown, adaptor 140 is used to
create a transition from exit port 131 to transfer plenum 144.
Adaptor 140 is shown as a separate part, however it is contemplated
that adaptor 140 may be unitary with housing 138 and/or transfer
plenum 144.
[0048] Transfer plenum 144 in the present embodiment includes rear
wall 144a, front wall 144b, rear cap 143a and front cap 143b. As
shown rear cap 143a and front cap 143b are unitary with rear wall
144a and front wall 144b, respectively. It is contemplated that
rear and front cap 143a, 143b could be separate from walls 144a,
144b. It is also contemplated that caps 143a and 143b could be a
single unitary cap. Transfer plenum 144 is open on the lower end to
facilitate fluid communication with air generator 130.
[0049] Plenum outlet 146 is located in an upper portion of front
wall 144b. Located proximate plenum outlet 146 are air alignment
elements 148. Plenum outlet 146 and air alignment elements 148
condition the exhaust air stream to project out of transfer plenum
144 towards outlet opening 111. Grill 120 connects proximate outlet
opening 111. Grill 120 includes grill elements 122. Grill elements
122 serve to further control and direct the exhaust air stream.
(see FIG. 3C)
[0050] In the exemplary embodiment, bearing ring 142 is used in
conjunction with rear flange 145a and front flange 145b to connect
transfer plenum 144 in a rotatable fashion with respect to air
generator 130. As shown rear flange 145a and front flange 145b are
unitary with rear wall 144a and front wall 144b, respectively. It
is contemplated that rear and front flange 145a, 145b could be
separate from walls 144a, 144b and/or a unitary part unto
themselves.
[0051] Also shown is oscillation mechanism 150 which includes
oscillation motor 152, crank 154, link 156 and shoulder screws 158.
Oscillation mechanism 150 oscillates transfer plenum 144 to
disperse the exhaust air stream over a wide area. As shown,
oscillation mechanism 150 is a crank and link type, however it has
been contemplated that other types, such as for example, gears and
reversible motors may be used. Although oscillation mechanism 150
is shown located at or near a bottom portion of transfer plenum 144
the invention is not so limited. It is contemplated that
oscillation mechanism 150 may be located at an upper or mid portion
of transfer plenum 144.
[0052] The rotation and/or oscillation of transfer plenum 144
within polygonal column 110 allows the exhaust air steam to be
dispersed without moving polygonal column 110. The stationary
aspect of polygonal column 110 during oscillation of the exhaust
air stream permits portable fan 100 to be less visually distractive
than conventional devices that move external components.
[0053] The rotation and/or oscillation of transfer plenum 144
independent of air generator 130 also allows electrical connections
(not shown) and electrical wires (not shown) to remain stationary
during the operation of portable fan 100. The wires and connections
between air generator 130, controller 170 (see FIG. 1) and/or other
features, such as light source 750 and/or electrical receptacle 752
(see FIG. 7), will remain stationary during the rotation and/or
oscillation of transfer plenum 144. The stationary aspect of the
wires and connections mitigates possible fatigue failure of the
wires and loosening of the connections.
[0054] Another advantage of the rotation and/or oscillation of
transfer plenum 144 independent of air generator 130 is the lower
overall mass that must be moved during rotation and or oscillation.
If oscillation mechanism 150 was required to move air generator 130
in conjunction with plenum 144 the accumulated mass would require
oscillation motor 152 to have greater power, thus increasing the
materials used to manufacture motor 152 and thereby increasing it's
cost. In a similar fashion, more manufacturing materials may be
need to increase the structural strength of other components, such
as for example; crank 154, link 156, shoulder screws 158 and
bearing ring 142. The use of more manufacturing materials will
increase the overall cost of portable fan 100.
[0055] Portable fan 100 may be assembled using conventional
fasteners, such as for example screws and or adhesives. It is also
contemplated that snaps, hooks and other features may be
incorporated into parts such as, for example polygonal column 110,
air generator 130, and transfer plenum 144.
[0056] FIGS. 2B and 2G are partial cross sections through
alternative embodiments of the connections along corresponding side
edges of panels 110a, 110b. 110c and 110d. FIG. 2B shows corner
structure 202 providing slots 204 and 206. As shown rear panel 110b
fits into slot 204 and side panel 110d fits into slot 206. A
similar structure would provided on all corresponding edges of
panels 110a, 110b. 110c and 110d. In the present example corner
structure 202 may be an extruded shape and may be formed of various
materials, such as for example; aluminum or polymer. It is also
contemplated that corner structure 202 may be formed of wood or
cast iron. Corner structure 222 of FIG. 2C is similar to corner
structure 202 of FIG. 2B except the overall shape has been modified
to polygonal.
[0057] As can be seen from FIGS. 2B and 2C the use of corner
structures 202 and 222 or similar provide several advantages.
Corner structures 202 and 222 are not unitary with panels 110a,
110b, 110c and/or 110d an thus expand the stealth or concealment
possibilities of portable fan 100. This non-unitary aspect may also
allow panels 110a, 110b, 110c and/or 110d to be reversible with two
distinct surfaces. The user would thereby have the option of
changing the overall aesthetic appearance of portable fan 100 by
reversing panels 110a, 110b, 110c and/or 110d to match surrounding
furniture and/or blend in with the room decor. For example, panels
110a, 110b, 110c, 110d may have a wood grain finish on one side and
a stainless steel finish on the opposite side. The user could
thereby remove, for example rear panel 110b from slot 204, reverse
the panel to expose the opposite side toward the exterior and
re-install rear panel 110b into slot 204. This permits portable fan
100 to have multiple appearances from which the user can choose.
The decorative possibilities of panels 110a, 110b, 110c and/or 110d
allow the user to obscure the existence or true state or character
of the portable fan 100.
[0058] The removable/replaceable/interchangeable panels 110a, 110b,
110c and/or 110d also provide a portable fan 100 that can be moved
from room to room (or from indoor use to outdoor use) while still
being adaptable to a particular room or environment in which the
portable fan 100 is being used.
[0059] Another advantage is the unlimited shapes and structures
that could be used for corner structures 202 and 222. These shapes
promote further aesthetic exploration and creates new application
possibilities for the consumer and valuable market advantages for
the manufacturer.
[0060] In a preferred embodiment where polygonal column 110 is
constructed of substantially flat surfaces, such as panels 110a,
110b. 110c and 110d. the use of substantially flat panels enhances
the ability to use novel materials, such as for example, wood,
fabric, and metals that are normally not associated with
conventional fans. These novel materials can be utilized without
adding exorbitant costs to portable fan 100 because of the
substantially flat surfaces associated with polygonal column
110.
[0061] FIG. 2D shows another embodiment that uses fasteners 210 to
connect rear panel 110b to side panel 110d. Fastener 210 as shown
is a flat head type screw, however it is contemplated that rivets,
snaps or adhesives may be used. As shown rear panel 110b is
configured to overlap side panel 110d to provide the area required
to utilize fastener 210. Alternatively, it is contemplated that
side panel 110d could be configured to overlap rear panel 110b.
[0062] FIG. 2E shows corner structure 232. Rear panel 110b and side
panel 110d are attached to corner structure 232 using fasteners
210. Fastener 210 as shown is a flat head type screw, however it is
contemplated that rivets or snaps may be used. Bosses 234 on corner
structure 232 are used to receive fastener 210. In the present
example, corner structure 232 may be a molded or die cast part. As
can be appreciated, the design of corner structure 232 may closely
simulate architectural elements, such as for example, trim and
molding profiles.
[0063] FIG. 2F shows an L-bracket 242. Rear panel 110b and side
panel 110d are attached to L-bracket 242 using fasteners 210.
Fastener 210 as shown is a flat head type screw, however it is
contemplated that rivets or snaps could be used. As shown the
corresponding edges of panels 110b and 110d would have multiple
L-brackets 242 along the vertical length, see FIG. 2A.
[0064] FIG. 2G shows corner structure 252. Rear panel 110b and side
panel 110d are attached to corner structure 232 using fasteners
210. Fastener 210 as shown is a flat head type screw, however it is
contemplated that rivets or snaps may be used. In the present
example corner structure 252 may be an extruded, molded or die cast
part. As can be appreciated use of corner structure 252 adds yet
another flat surface that can expand the aesthetic design of
portable fan 100.
[0065] The use of polygonal column 110 as described protects
internal components (air generator 130, oscillation mechanism 150
and electrical connections) of portable fan 100 from direct
exposure to environmental conditions that may be harmful. These
environmental conditions may include for example: direct sun light,
rain, dew, dust, dirt, etc. It is further contemplated that
portable fan 100 may be constructed of material such as polymers
and/or other components, such as for example rain sensors, sealed
motors, and sealed switches that would optimize a weather proof
construction. The use of these materials and components further
facilitates the outdoor use of portable fan 100 on, for example,
decks, boats and other areas that might be exposed to varying
weather conditions.
[0066] The use of oscillation mechanism 150 to rotate and/or
oscillate the exhaust air stream without moving polygonal column
110 reduces the visual distraction normally associated with
conventional fans.
[0067] FIGS. 3A through 3D illustrate the air flow pattern into,
through, and exiting the exemplary embodiment of FIG. 1. FIG. 3A is
a cross sectional view taken along cross section plane 3-3 of FIG.
1. FIG. 3B is in turn a cross sectional view taken along cross
section plane 3B shown in FIG. 3A. The rotation of motor 132 causes
air impeller 134 to rotate inducing intake air 300 into interior
space 113 defined by polygonal column 110 through air inlets 112.
Intake air 300 enters air generator 130 through at least one intake
port 136 and is accelerated by impeller 134 and exits air generator
130 through exit port 131 as exhaust air stream 302. Exhaust air
stream 302 passes through interior space 141 of transfer plenum
144, which in this example is oriented substantially vertically,
and exits transfer plenum 144 via plenum outlet 146 passing through
air alignment elements 148. Exhaust air stream 302 subsequently
exits interior space 113 of polygonal column 110 through outlet
opening 111 and grill 120.
[0068] As shown in FIG. 3A, intake air 300 may enter exterior
housing 110 through two inlets 112 located on opposite sides of air
generator 130. Intake air 300 enters air generator 130 through two
intake ports 136 on opposite sides of air generator 130. Although
shown having a single air exit port 131, air generator 130 may also
include more than one exit port 131 that discharge exhaust air
stream 302 from air generator 130 into adaptor 140 and subsequently
into transfer plenum 144.
[0069] In the embodiment shown in FIGS. 3A and 3B, intake air 300
enters interior space 113 of polygonal column 110 along first flow
path 312. Exhaust air stream 302 exits air generator 130 along
second flow path 314. Exhaust air stream 302 exits transfer plenum
144 and polygonal column along third flow path 316. In the
exemplary embodiment shown, first flow path 312 is substantially
orthogonal to second flow path 314, and second flow path 314 is
substantially orthogonal to third flow path 316. In one embodiment,
third flow path 316 is orthogonal to first flow path 312. In
another embodiment, third flow path 316 is substantially parallel
to first flow path 312. Air directing component 310 assures that
exhaust air stream 302 transitions smoothly from second flow path
314 to third flow path 316. The smooth transition from second flow
path 314 to third flow path 316 maintain the desired air flow
velocity of exhaust air stream 302. In one embodiment third flow
path 316 is parallel to support surface 320 allowing exhaust air
stream 302 to project away from portable fan 100. The projection of
exhaust air stream 302 away from portable fan 100 reduces the
recirculation of exhaust air stream 302 between air outlet opening
111 and air inlets 112.
[0070] The flow of air into, though, and out of portable fan 100 as
described allow exhaust air stream 302 to exit portable fan 100
from upper portion 322 of polygonal column 110 above air generator
130 and thus be elevated above support surface 320. (Upper portion
322 is defined by the upper half of the overall length "OAL" of
portable fan 100). In one embodiment air generator 130 may be
located in upper portion 322 of polygonal column 110. As shown air
generator assembly 130 is located in lower portion 324 of polygonal
column 110 allowing the mass of air generator 130 to be located
closer to support surface 320. The location of the mass of air
generator 130 in lower portion 324 as shown relative to support
surface 320 increases the stability of portable fan 100 and
minimizes the size of base 116, thus maximizing space saving
characteristics of portable fan 100 while allowing the elevation of
plenum outlet 146 and grill 120 above support surface 320. The
increased stability also is advantageous for portable fan 100 when
located outdoors and subject to external forces, such as for
example, wind gusts, accidental impact, etc.
[0071] In one embodiment, the center of gravity (not shown) of
portable fan 100 is located within lower portion 324 of polygonal
column 110.
[0072] As illustrated by FIGS. 3A and 3B, another advantage of the
relationship between air flow paths 312, 314 and 316 is that the
location of impeller 134 is not proximate grill 120. The location
and distance of outlet opening 111 and grill 120 from impeller 134
increases the safety of portable fan 100. This distance decreases
the possibility that a foreign object, (not shown) can contact
impeller 134 when inserted into interior space 113 of polygonal
column 110 through outlet opening 111. This distance combined with
grill 120 enhances the protection of impeller 134 from damage and
the user of portable fan 100 from possible injury.
[0073] FIG. 3C is a horizontal cross section through plenum outlet
146 and grill 120 of portable fan 100. As can be seen the
oscillation of plenum 144 causes plenum outlet 146 to move along
movement arc 342. Air alignment elements 122 of grill 120 are
divergently angled relative to air projection centerline 340. As
shown, angled air alignment elements 122 provide a smooth
transition for third air flow path 316 between movement arc 342 and
flat face 344 of grill 120. The smooth transition helps maintain
the air velocity and volume of exhaust air stream 302 as it exits
grill 120 and oscillates through oscillation angle 346. The ability
to project exhaust air stream 302 efficiently through grill 120
throughout oscillation angle 346 maintains the cooling effect on
the user located within the area covered by the oscillation of
exhaust air stream 302 through oscillation angle 346.
[0074] As shown the divergently angled air alignment elements 122
are unitary with grill 120, the invention is not so limited. It is
contemplated that air alignment elements 122 could be a separate
part, (not shown) distinct from grill 120.
[0075] FIG. 3D is a partial cross section through the upper portion
of plenum showing an alternative embodiment of air directing
component 350. As shown air directing component 350 includes
horizontal plates 352, 354, and 356. As exhaust air stream 302
travels along second flow path 314 horizontal plates 352, 354 and
356 redirect the flow of exhaust air stream 302 along third flow
path 316. As shown, horizontal plates 352, 354 and 356 extend into
second flow path 314 of exhaust air stream 302 at different
elevations. Horizontal plates 352, 354 and 356 also have varied
length as they extend into flow path 314 of exhaust air stream 302.
The different elevations and the varied lengths of plates 352, 354
and 356 distribute the flow of exhaust air stream 302 more evenly
across the vertical length of plenum outlet 146. The normal flow of
air absent plates 352, 354 and 356 would force the majority of
exhaust air stream 302 to exit at the upper vertical extent of
plenum outlet 146.
[0076] It has been found that the even distribution of exhaust air
stream 302 across the vertical length of plenum outlet 146 also
mitigates air noise. The energy of exhaust air stream 302 is
distributed over a greater area of plenum outlet 146. The
turbulence associated with exhaust air stream 302 as it exits
plenum outlet 146 is decreased and the noise generated by the
turbulence is subsequently decreased.
[0077] FIG. 4 shows an alternative embodiment of transfer plenum
444 for the exemplary embodiment of FIG. 2A. In the exemplary
embodiment adaptor 140 is used to create a transition from exit
port 131 of air generator 130 to transfer plenum 444. Transfer
plenum 444, unlike transfer plenum 144 of FIG. 2A, is designed to
create a gradual and smooth transition from the shape of the
interface between adaptor 140 and transfer plenum 444 to the shape
of plenum outlet 146. The gradual transitional shape of transfer
plenum 444 conserves the velocity of exhaust air 302, (not shown)
as it travels from air generator 130 to plenum outlet 146.
Transitional plenum 444 defines internal space 441. Also shown are
oscillator mechanism 150 and air alignment elements 148. In all
other respects, transfer plenum 444 functions similar to transfer
plenum 144 of FIG. 2A.
[0078] FIGS. 5A and 5B compare the thrust characteristics of a
conventional axial blade fan and an exemplary portable fan 100.
FIG. 5A shows air velocity in feet per minute versus the thrust
developed in pounds for a conventional axial blade fan. The shaded
area under the curve is the required power from the motor of a
conventional axial blade fan in lbs-ft per minute. The shaded area
below the curve is also indicative of the air volume generated by a
conventional axial blade fan. FIG. 5B shows air velocity in feet
per minute versus the thrust developed in pounds by portable fan
100 in accordance with one exemplary embodiment of the present
invention. The shaded area under the curve is the required power
from the motor of portable fan 100 in lbs-ft per minute. The shaded
area below the curve is also indicative of the air volume generated
by portable fan 100.
[0079] As shown in FIGS. 5A and 5B, air generator 130 of portable
fan 100 is designed to optimize the characteristics of achieving a
desired air velocity exiting portable fan 100 while minimizing the
thrust created by the velocity of the exhaust air stream.
Maintaining the velocity at a high level maximizes the cooling
effect for the user. Minimizing or limiting the thrust reduces it's
destabilizing effects on portable fan 100. Thrust is the force that
is generated in a direction opposite the flow of exhaust air stream
302 along air path 316 as it exits outlet opening 111, as shown in
FIGS. 3A and 3B. To remain stable and in an upright position,
portable fan 100 must counteracted this force of thrust. One method
of counteracting the force of thrust is to increase the size of
base 116 of portable fan 100. Minimizing or limiting the thrust
reduces it's destabilizing effects and in-turn reduces the need for
a large base. Reducing the need of a large base facilitates
possible space saving characteristics while allowing an elevated
exhaust air stream 302. The ability of air generator 130 to
generate a low volume of air with a high velocity achieves the
desired low thrust characteristics for exhaust air stream 302. In
one embodiment, air generator 130 is a centrifugal air generator.
Centrifugal air generators are able to generate a preferred low
volume high velocity air stream.
[0080] Another advantage to the minimization of thrust is that
motor 132 of air generator 130 does not require the power that
would be needed to move a greater volume of air. This allows the
needed motor torque to be reduced and decreases the heat generated
by the motor. Motor 132 can therefore utilize fewer materials and
be less expensive while yet producing the required exhaust air
stream velocity. This in turn yields cost savings for the
manufacturer and the consumer.
[0081] In one exemplary embodiment, high velocity exhaust air
stream 302 has a maximum velocity of about 500 feet per minute or
greater when measured at a distance of about 8 feet from outlet
opening 111 of portable fan 100. In a preferred embodiment the
maximum velocity of exhaust air stream 302 is greater than 1000
feet per minute when measured 8 feet from air outlet opening 111.
In another embodiment, the maximum velocity of exhaust air stream
302 is between 750 feet per minute and 2000 feet per minute. The
maximum velocity of exhaust air stream 302 is measured by locating
an anemometer 8 feet from outlet opening 111 of portable fan 100.
The anemometer is moved vertically up and down and horizontally
while maintaining the 8 feet of distance until the maximum velocity
within exhaust air stream 302 is located. In another exemplary
embodiment, the maximum thrust generated in a direction opposite
the direction of the flow of air path 316 of exhaust air stream 302
is about 1.0 lbs or less. In one embodiment, the maximum thrust is
less than 0.7 lbs. The maximum thrust is measured using a certified
thrust table as specified by AMCA (Air Movement and Control
Association). In another exemplary embodiment, the ratio of the
maximum velocity of exhaust air stream 302 measured at a distance
of about 8 feet from air outlet opening 111 divided by the maximum
thrust generated in a direction opposite to the direction of the
flow of air path 316 of exhaust air stream 302 is about 500:1 or
greater.
[0082] FIG. 6 shows another exemplary perspective view of portable
fan 600 which includes polygonal column 610. Polygonal column 610
defines interior space 613. Top 614 is located at vertical extent
of polygonal column 610 and base 616 is located at the bottom of
polygonal column 610. Outlet opening 611 and grill 620 are located
in an upper portion of polygonal column 610 while inlet 612 is
located on a face of polygonal column 610 opposite outlet opening
611.
[0083] Air generator 630 is disposed within polygonal column 610
and draws air into polygonal column 610 via inlet 612. The air is
subsequently expelled from polygonal column 610 through outlet
opening 611 and grill 620.
[0084] Portable fan 600 also includes at least one control assembly
670. Control assembly 670 controls one or more functions of
portable fan 600. Also shown is power cord 605, utilized to connect
portable fan 600 to an electrical power source (i.e. wall outlet).
The electrical component connections of portable fan 600 are
integrated within the device, such as for example between control
assembly 670 and air generator 630. The integration of the
electrical component connections within the device eliminates the
need for the user to make such connections. In the exemplary
embodiment shown, for example, only the connection of power cord
605 to an electrical power source is required for operation of the
device. The integration of all the electrical component connections
within the device also enhance the portability of portable fan
600.
[0085] Preferably power cord 605 will utilize a safety plug.
Details of the safety plug and it's advantages can be referenced in
U.S. Pat. Nos. 6,394,848; 6,604,965; 6,793,535; and 6,896,544,
which are hereby incorporated herein by reference.
[0086] Also shown in FIG. 6 is cross section plane 8-8. The
horizontal cross section taken along cross section plane 8-8 is
illustrated in FIG. 8, which is described in more detail below.
[0087] FIG. 7 is an exploded perspective view of the exemplary
embodiment of portable fan 600 shown in FIG. 6. As shown base 616
serves to stabilize portable fan 600 on a mounting surface, (not
shown). Base 616 in the present example may be constructed of more
than one part such as for example, portion 616a and 616b. In the
embodiment shown front panel 610a, rear panel 610b, side panel 610c
and side panel 610d are connected together along corresponding
edges to form polygonal column 610. Panels 610a, 610b, 610c and
610d are connected to base 616. Also located in rear panel 610b is
inlet openings 612. Outlet opening 611 is located in an upper
portion of front panel 610a. Top 614 and inlet grill 618 are also
shown. Top 614 in the present example may be constructed of more
than one part such as for example, portion 614a and 614b.
[0088] Disposed within panels 610a, 610b, 610c and 610d is air
generator 630. As shown air generator 630 is a cross-flow
transverse air generator and includes motor 632, motor bracket 634,
lower plate 636, upper plate 638, impeller 631, air guide 633, air
cut off 635 and upper bracket 637. Motor bracket 634 and upper
bracket 637 are used to attach air generator 630 to polygonal
column 610. It is contemplated that motor bracket 634 and/or upper
bracket 637 may be unitary with other parts of portable fan 600,
such as for example, rear panel 610b, lower plate 636, upper plate
638 and/or motor 632. Impeller 631 is rotated by motor 632 and
draws inlet air into polygonal column 610 via at least one inlet
openings 612. The inlet air is subsequently accelerated by the
rotation of impeller 631 and expelled from polygonal column 610 as
an exhaust air stream via outlet opening 611 and through grill 620.
Grill 620 is located proximate outlet opening 611. Grill 620
includes grill elements 622. Grill elements 622 serve to further
control and direct the exhaust air stream.
[0089] In the exemplary embodiment lower plate 636, upper plate
638, air guide and 633 air cut off 635 are connected together and
rotatable with respect to polygonal column 610 and/or base 616.
Also shown is oscillation mechanism 650 which includes oscillation
motor 652, crank 654, link 656 and shoulder screws 658. Oscillation
mechanism 650 oscillates; lower plate 636, upper plate 638, air
guide and 633 air cut off 635 to disperse the exhaust air stream
over a wide area. As shown Oscillation mechanism 650 is a crank and
link type, however it has been contemplated that other types such
as for example gears and reversible motors may be used.
[0090] The rotation and/or oscillation of lower plate 636, upper
plate 638, air guide and 633 air cut off 635 within polygonal
column 610 allows the exhaust air to be dispersed without moving
polygonal column 610. The stationary aspect of polygonal column 610
during oscillation of the exhaust air stream permits portable fan
600 to be less visually distractive than conventional devices that
move external components.
[0091] The rotation and/or oscillation of lower plate 636, upper
plate 638, air guide and 633 air cut off 635 independent of motor
632 allows electrical connections (not shown) and electrical wires
(not shown) to remain stationary during the operation of portable
fan 600. The wires and connections between motor 632, controller
670 (see FIG. 6) and/or other features such as light source 1050
(see FIG. 10) will remain stationary during the rotation and/or
oscillation movement. The stationary aspect of the wires and
connections mitigates possible fatigue failure of the wires and
loosening of the connections.
[0092] In all other respects polygonal column 610 is similar to
polygonal column 110 of FIG. 2.
[0093] FIG. 8 shows the air flow pattern through an alternative
embodiment of portable fan 600. Polygonal column 610 defines
interior space 613. Top 614 is located at the upper vertical extent
of polygonal column 610 and base 616 is located at the bottom of
polygonal column 610. Inlet 612 is located in an upper portion of
polygonal column 610 and outlet grill 620 is located in an upper
portion of polygonal column 610, in this example opposite inlet
612.
[0094] Disposed within interior space 613 is cross-flow impeller
631, motor 632, motor bracket 634, motor bracket 636, upper bracket
637. Motor 632 rotates impeller 631 and draws air into polygonal
column 610 via inlet 612. Located proximate inlet 612 is inlet
grill 618 through which the air drawn into polygonal column 610
passes. The air is subsequently expelled from polygonal column
through grill 620.
[0095] Although motor 632 is located below impeller 631 it is
contemplated that motor 632 may be located at the upper end of
polygonal column 610 below top 614. This location of motor 632 will
helps to shield motor 632 from outdoor elements such as rain and
allows gravity to pull rain away from motor 632 and towards base
616, thus decreasing the possibility that water will enter motor
632 and compromise function.
[0096] As shown inlet air 802 travels along flow path 803 and
exhaust air stream 804 travels along flow path 805. Both flow paths
803 and 805 are substantially parallel to support surface 800.
[0097] The use of cross-flow impeller 631 may not perform as well
outdoors as the previous embodiment of FIG. 2A due to the dynamics
of air flow associated with the cross-flow impeller designs. The
flow of inlet air 802 into cross-flow impeller 631 will be
detrimentally influenced by air movement and air pressures changes
external to polygonal column 610. These changes are more frequent
outdoors than indoors. However it has been contemplated that the
size of polygonal column 610 in conjunction with the design of
inlet 612 could be manipulated to mitigate the detrimental effects
of external air movements and pressures. The location and diameter
of cross-flow impeller could be further manipulated to also
mitigate the detrimental effects of external air movements and
pressures. In short the use of polygonal column 610 increases the
feasibility of the use of a cross-flow impeller to create exhaust
air stream 604 with the desired velocity characteristics in an
outdoor application.
[0098] Cross-flow impeller 631 provides several advantages. For
example, the use of cross-flow impeller 631 will cost less to
manufacture when compared to air generator 130, transfer plenum 144
and adaptor 140 of FIG. 2. As shown, air generator 630 requires
fewer parts and materials. The elevated location and the relatively
short length of cross flow impeller 631 within polygonal column 610
does not requiring a long impeller to extend the entire length of
polygonal column 610 to achieve the desired elevation. The short
length of cross flow impeller 631 lowers the power requirements of
motor 632 which in turn lowers the cost of motor 632 while yet
providing the desired elevation of exhaust air stream 604.
[0099] FIGS. 9A and 9B illustrate the packaging and shipping
advantages of portable fan 600 constructed with polygonal column
610 utilizing separate panels such as; front panel 610a, rear panel
610b, side panel 610c and side panel 610d. As shown in FIG. 9A,
polygonal column 610, base 616 and top 614 are disassembled in a
non-operating configuration and disposed within package 900. Air
generator 630 is also disposed within package 900. FIG. 9A is an
end view of package 2100.
[0100] FIG. 9B shows an end view of package 902 with an identical
portable fan 600 of FIG. 9A absent the ability to further
disassemble polygonal column 610 into separate panels (610a, 610b,
610c, 610d). As can be seen the overall size of package 902 of FIG.
9B is larger than package 900 of FIG. 9A. The space economization
of package 900 of FIG. 9A reduces the cost to transport portable
fan 600 and the overall cost of the product to the consumer.
[0101] FIG. 10 is an alternative embodiment of portable fan 1000
showing various additional features. As shown portable fan 1000 may
include light source 1050, electrical receptacle 1052 and/or air
filtration elements 1080. Preferably light source 1050 would be
located between polygonal column 1010 and top 1014. It is
contemplated that light source 1050 and/or an additional light
source (not shown) could be located between polygonal column 1010
and base 1016.
[0102] It is contemplated that light source 1050 may uses light
emitting diodes (L.E.D.) and clear polymer plates, such as a poly
carbonate material for example. The use of L.E.D. as a light source
has several advantages. First, the power usage is low compared to
other types of light sources. Also, the life span of an L.E.D. is
much greater than other light sources. In addition, the ability to
"weatherproof" the L.E.D. is simple when compared to larger light
sources that require several components such as for example,
sockets. Further, the use of an L.E.D. light source and polymer
plates create a compact light source that can easily be crafted
into many shapes and sizes. Each of the above mentioned
characteristics further enhances the design flexibility inherent in
the construction of portable fan 1000.
[0103] Electrical receptacle 1052 is shown located in the same side
of polygonal column 1010 as grill 1020. It is contemplated that
electric receptacle 1052 may be located on any side of polygonal
column 1010 and/or base 1016.
[0104] As shown in FIG. 10 the large flat surfaces of polygonal
column 1010 allow the use of multiple inlet openings 1012 and
multiple air filtration elements 1080 disposed proximate multiple
air inlets 1012. The size of multiple inlets 1012 and multiple air
filtration elements 1080 increase the filter area and the capacity
of inlet air to pass through air filtration elements 1080 without
starving air generator 630 disposed within polygonal column 1010.
The absence of starving air generator 1030 permits an efficient
generation of a filtered exhaust air flow.
[0105] It is contemplated that air filtration elements 1080 may be
standard commercially available filter elements. It is also
contemplated that air filtration elements 1080 may include a photo
catalyst substance such as for example Titanium Dioxide (TiO2).
Filtration of the inlet air is enhance by the photo catalyst
substance when used in conjunction with internal light source 1090.
Internal light source 1090 produces photo energy with the proper
frequency, for example between about 200 nm and about 600 nm. The
photo energy produced by internal light source 1090 excites the a
photo catalyst substance which in turn produces a chemical energy.
The produced chemical energy subsequently oxidizes at least a
portion of the organic compounds that may be part of the intake
air. In all other respects portable fan 1000 functions similar to
the previous embodiments.
[0106] FIGS. 11A through 11E show a comparison of the present
invention, portable fan 1100, conventional tower fan 1120 and
conventional pedestal fan 1130. Conventional pedestal fan 1130 of
FIG. 11A, includes air generation head 1132, pole 1136 and base
1138. Air generation head 1132 oscillates along oscillation path
1134 relative to pole 1136 and base 1138. As can be seen air
generation head 1132 includes blade 1135 and protective grill 1133.
The rotation of blade 1135 and the oscillation of air generation
head 1132 in conjunction with the limited stationary surface area
of the pole 1136 and base 1138 contribute to the visually
disruptive character of conventional pedestal fan 1130.
[0107] Conventional tower fan 1120 of FIG. 11B, includes air
generation 1122, pole 1126 and base 1128. Air generation head
includes protective grill 1125 and housing 1127. Air generation
head 1122 oscillates along oscillation path 1124 relative to pole
1126 and base 1128. Similar to conventional pedestal fan 1130, the
oscillation of air generation head 1122 in conjunction with the
limited stationary surface area of the pole 1126 and base 1128
contribute to the visually disruptive character of conventional
tower fan 1120.
[0108] Portable fan 1100 of FIG. 11C, includes polygonal column
1110, base 1118, top 1114 and protective grill 1115. As described
previously, (see FIGS. 2 and 6) the air generator and oscillation
movement are located within polygonal column 1110 thus reducing the
visible movement of portable fan 1100. As can be appreciated the
visually disruptive characteristics of portable fan 1100 have been
greatly reduced when compared to conventional tower fan 1120 and
conventional pedestal fan 1130.
[0109] Polygonal column 1110 also increases the surface area of
portable fan 1100. As shown in FIG. 11D the substantially polygonal
horizontal cross section 1140 of polygonal column 1110 utilizes the
available space 1162 in the corners of a shipping package 1160 when
compared to the substantially circular horizontal cross section
1150 of conventional tower fan 1120. This use of available space
1162 in the corners of a shipping package 1160 allows polygonal
column 1110 to create more stationary surface area without
drastically increasing the shipping package size and cost.
[0110] The use of novel materials and construction of polygonal
column 1110, (see FIGS. 2A, 2B and 2C) in combination with the
increased surface area of polygonal column 1110 and the stationary
characteristics of oscillation contribute to the ability to
construct a fan that is differentiated from conventional fans.
Furniture styles such as Colonial, Missions, Shaker and others can
easily be imposed upon the described structure. Architectural
elements such as for example Greek column styles: Ionic, Corinthian
or Doric can also be integrated on the surfaces of polygonal column
1110, (see FIGS. 12 thru 24). The use of the styles and materials
as described has the advantage of disguising portable fan 1100.
Disguise signifies: to modify the manner and/or appearance of in
order to prevent recognition. This ability can create a more
palatable aesthetic presence for portable fan 1100 when compared to
conventional tower fan 1120 and conventional pedestal fan 1130,
thus creating new areas of use.
[0111] The design and materials of polygonal column 1110 are
preferably chosen from a variety of materials, colors, and
decorative patterns allowing the selection which match furniture
and a general room decor. The design and materials of polygonal
column 1110 provides a portable fan 1100 that blends in with or
adds to a home's decor. In this manner, the portable fan 1100
provides design is unobtrusive and furtive in the environment in
which it is used.
[0112] The design flexibility inherent in polygonal column 1110
allows portable fan 1100 to mimic other familiar objects. It is
contemplated that polygonal column 1110 could be so configured so
as to be utilitarian. Examples of such a configuration are: clocks,
chairs, tables, lamps, coat racks, ornamental plants, vases,
statuary, corner columns and ceiling mounted apparatus. The ability
to incorporate utilitarian characteristics into polygonal column
1110 further expands applicable areas of use for portable fan
1100.
[0113] Briefly stated, the mechanical structure and/or visible
movement of conventional tower fan 1120 and conventional pedestal
fan 1130 impede the ability to explore new aesthetic elements that
serve to differentiate the units in the marketplace. Portable fan
1100 promotes this aesthetic exploration and creates new
application possibilities for the consumer and valuable market
advantages for the manufacturer.
[0114] As described the preferred embodiment of portable fan of the
invention uses an air generator, (having the proper volume and
velocity characteristics) to generate an exhaust air stream. Low
thrust permits the exhaust air stream to be elevated above a
support surface without compromising the stability of the portable
fan. Preferably the location of the air generator is in a lower
portion of the polygonal column, thus allowing the mass of the air
generator to remain closer to the support surface. The location of
the air generator as described further enhances the stability of
the portable fan. A transfer plenum in conjunction with air
directing components conserve the velocity of the exhaust air
stream exits the polygonal column above the support surface. As a
result the preferred embodiment of the portable fan supplies an
exhaust air stream elevated above a support surface, allowing the
generated air stream to more readily affect the user's upper body.
As described the velocities of the exhaust air stream are
sufficient to impinge upon the user and further enhance the cooling
sensation. The enhanced stability of the portable fan allows the
size of the base to be minimized contributing to space saving
characteristics.
[0115] In one preferred embodiment, the polygonal column is
constructed of flat surfaces, such as panels. The use of flat
surfaces enhance the ability to use novel materials normally not
associated with conventional fans. The polygonal column is used to
enhance the protection of the internal components of the portable
fan from direct exposure to environmental conditions that may be
harmful.
[0116] Although the embodiments illustrate the preferred
oscillation and/or rotation of the exhaust air stream as being
accomplished without moving the polygonal column, the invention is
not so limited. The absence of oscillation movement of the outer
panels reduces the visual distraction normally associated with
conventional fans. However, as can be appreciated the structure of
the polygonal column and the use of innovative material and forms
that the structure enhances the construction of a portable fan
differentiated from conventional fans. The ability to construct a
portable fan having the appearance of furniture and/or
architectural elements has obvious market advantages for the
manufacturer. The fan incorporated into furniture and/or
architectural elements allows the manufacturer to provide the
consumer with a cost effective and innovative product.
[0117] Although the invention has been described with reference to
exemplary embodiments, it is not limited thereto. Rather, the
appended claims should be construed to include other variants and
embodiments of the invention, which may be made by those skilled in
the art without departing from the true spirit and scope of the
present invention.
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