U.S. patent application number 11/696107 was filed with the patent office on 2007-11-15 for apparatus for providing fluid through a vehicle seat.
Invention is credited to Hanh Dong, John Lofy, David Marquette.
Application Number | 20070262621 11/696107 |
Document ID | / |
Family ID | 46327658 |
Filed Date | 2007-11-15 |
United States Patent
Application |
20070262621 |
Kind Code |
A1 |
Dong; Hanh ; et al. |
November 15, 2007 |
APPARATUS FOR PROVIDING FLUID THROUGH A VEHICLE SEAT
Abstract
A seat assembly comprises a seat cushion having an outer surface
comprising a front side for supporting an occupant in a sitting
position and a rear side. A base member is positioned on the rear
side of the seat cushion. A first passage extends through the seat
cushion. A ventilation system is provided for distributing air from
the first passage along the support surface of the seat cushion. A
climate control apparatus is provided for providing climate
conditioned air to the ventilation system. A conduit connects the
climate control apparatus to the ventilation system.
Inventors: |
Dong; Hanh; (Pomona, CA)
; Lofy; John; (Claremont, CA) ; Marquette;
David; (Farmington Hills, MI) |
Correspondence
Address: |
KNOBBE MARTENS OLSON & BEAR LLP
2040 MAIN STREET
FOURTEENTH FLOOR
IRVINE
CA
92614
US
|
Family ID: |
46327658 |
Appl. No.: |
11/696107 |
Filed: |
April 3, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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10973947 |
Oct 25, 2004 |
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11696107 |
Apr 3, 2007 |
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Current U.S.
Class: |
297/180.12 ;
297/180.15 |
Current CPC
Class: |
A47C 7/74 20130101; B60N
2/5635 20130101; A47C 7/72 20130101; B60N 2/667 20150401 |
Class at
Publication: |
297/180.12 ;
297/180.15 |
International
Class: |
A47C 7/72 20060101
A47C007/72 |
Claims
1. A conduit for placing a climate control device in fluid
communication with a fluid passage in a cushion, the conduit
comprising: a body; a first port at a first end of the body, the
first port comprising an engagement member adapted to couple the
first port to the climate control device; and a second port at a
second end of the body, the second port configured to cooperate
with a rear side of the cushion.
2. The conduit as in claim 1, wherein the body is made of a
flexible material.
3. The conduit as in claim 2, wherein the body is made of an
elastomer
4. The conduit as in claim 1, wherein at least one of the first
port and the second port is made of plastic.
5. The conduit as in claim 1, wherein both of the first port and
the second port are made of plastic.
6. The conduit as in claim 1, wherein the second port is configured
to be attached to the rear side of the cushion.
7. The conduit of claim 1, wherein the second end of the body
includes a flange that surrounds the second port.
8. The conduit as in claim 7, wherein the flange is configured to
fit within a recess formed on the rear side of the automotive
seat.
9. The conduit as in claim 8, wherein the flange includes a touch
fastener.
10. The conduit as in claim 1, wherein the engagement member
comprises a prong configured to be inserted into an opening.
11. The conduit as in claim 1, wherein the engagement member
comprises at least one clip configured to engage a recess.
12. The conduit as in claim 1, wherein the body has a bellows
arrangement.
13. A climate controlled seat assembly, comprising: a seat cushion
having an outer surface comprising a front side for supporting an
occupant in a sitting position and a rear side, the rear side and
front side generally facing in opposite directions; a passage
extending through the seat cushion, the passage communicating with
an opening on the rear side of the portion of the seat cushion; a
fluid system to supply or withdraw fluid from the passage; and a
conduit extending from the passage, the conduit comprising: a first
end comprising an engagement member adapted to secure the conduit
to an output port of the fluid system in a snap fit; and a second
end configured place the conduit in fluid communication with the
passage extending through the seat cushion.
14. The climate controlled seat assembly of claim 13, wherein the
seat assembly further comprises a heat transfer device.
15. The climate controlled seat assembly of claim 14, wherein the
heat transfer device comprises a Peltier Circuit.
16. The climate controlled seat assembly of claim 14, wherein the
heat transfer device comprises a resistive heating element.
17. The climate controlled seat assembly of claim 12, wherein the
second end of the conduit includes a touch fastener.
18. The climate controlled seat assembly of claim 13, wherein the
conduit is flexible.
19. A method of assembling a climate controlled seat assembly
comprising the steps of: providing a cushion having an opening
accessible from at least one side of the cushion, the cushion being
attached to a frame; attaching a conduit to the cushion so as to
place the conduit in fluidic communication with the opening; and
coupling a portion of the conduit to a fluid flow generation device
with a snap fit.
20. The method of claim 19, wherein attaching the conduit to the
cushion further comprises utilizing a touch fastener having a first
portion coupled to the cushion and a second portion coupled to the
conduit.
Description
CLAIM OF PRIORITY
[0001] This application is a continuation-in-part from U.S. patent
application Ser. No. 10/973,947, filed Oct. 25, 2004 which is
incorporated in its entirety by reference herein.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] This invention relates to climate control. More
specifically, this invention relates to climate control of a
cushion.
[0004] 2. Description of the Related Art
[0005] Temperature modified air for environmental control of living
or working space is typically provided to relatively extensive
areas, such as entire buildings, selected offices, or suites of
rooms within a building. In the case of vehicles, such as
automobiles, the entire vehicle is typically cooled or heated as a
unit. There are many situations, however, in which more selective
or restrictive air temperature modification is desirable. For
example, it is often desirable to provide an individualized climate
control for an occupant seat so that substantially instantaneous
heating or cooling can be achieved. For example, an automotive
vehicle exposed to the summer weather, where the vehicle has been
parked in an unshaded area for a long period of time, can cause the
vehicle seat to be very hot and uncomfortable for the occupant for
some time after entering and using the vehicle, even with normal
air conditioning. Furthermore, even with normal air-conditioning,
on a hot day, the seat occupant's back and other pressure points
may remain sweaty while seated. In the winter time, it is highly
desirable to have the ability to quickly warm the seat of the
occupant to facilitate the occupant's comfort, especially where the
normal vehicle heater is unlikely to warm the vehicle's interior as
quickly.
[0006] For such reasons, there have long been various types of
individualized climate control systems for vehicle seats. Such
climate control systems typically include a distribution system
comprising a combination of channels and passages formed in the
cushion of the seat. Climate conditioned air is supplied to these
channels and passages by a climate control device. The climate
conditioned air flows through the channels and passages to cool or
heat the space adjacent to the surface of the vehicle seat.
[0007] There are, however, problems that have been experienced with
existing climate control systems for seats. For example, some
climate control systems are not easily integratable into existing
seat construction methods. Such systems require a significantly
greater number of parts as compared to existing automotive seats,
and often require complex mechanical parts. In the past, this has
resulted in increased costs for individualized occupant cooling in
automobiles. The current techniques are also problematic because
they may limit the ability for vehicle designers to provide modern
seating embodiments and stylistic designs. For example, many modern
seats include an adjustable lumbar support device. Typically, such
a device is disposed within a backrest of a seat and is configured
to incrementally adjust the contour of the backrest to provide
variable lumbar support. The location and movement of the backrest
provides significant engineering obstacles for the climate control
system. In response, current climate control systems simply avoid
or duct around the lumbar support device and the portions of the
backrest that move. This results in a more complicated design and
increased costs.
[0008] Another problem that has been experienced with existing
climate control systems for seats involves the connection between
the channels and passages formed in the cushion of the seat and the
climate control device which supplies conditioned air to these
channels and passages. Specifically, the connection may create a
region of rigidity in the seat cushion degrading the feel and
comfort of the seat.
[0009] Thus there is a need for an improved climate control
apparatus for a climate control system for seats.
SUMMARY OF THE INVENTION
[0010] Accordingly, one aspect of the present invention comprises a
conduit for placing a climate control device in fluid communication
with a fluid passage in a cushion (e.g., a cushion of an automotive
seat, wheel chair, theater seat or bed). The conduit comprises a
body, a first port and a second port. The first port is at a first
end of the body and is configured to couple with an outlet port of
the climate control device. The second port is at a second end of
the body. The second port is configured to couple with a rear side
of the cushion.
[0011] Another aspect of the present invention comprises a climate
controlled seat assembly. The assembly includes a seat cushion
having an outer surface comprising a front side for supporting an
occupant in a sitting position and a rear side. The rear side and
the front side generally face in opposite directions. A base member
is positioned on the rear side of the seat cushion. The assembly
can include an adjustable support device capable of moving a
portion of the seat cushion between at least a first position in
which the first portion of the seat cushion is located a first
distance from the base member and a second position in which the
portion of the seat cushion is located a second distance from the
base member. The second distance is greater than the first
distance. A passage extends through the seat cushion. The passage
communicates with an opening on the rear side of the portion of the
seat cushion. A conduit extends from the passage and through at
least a portion of the adjustable support device.
[0012] Another aspect of the present invention comprises a climate
controlled seat assembly that includes a seat cushion having a
front side, a rear side and an outer surface comprising a support
surface for supporting an occupant in a sitting position. The
support surface is located generally on the front side of the seat
cushion. The seat assembly includes an adjustable support device
capable of moving a lumbar portion of the cushion between at least
a first position, in which the lumbar portion of the support
surface protrudes a first distance towards the occupant, and a
second position, in which the lumbar portion protrudes a second
distance towards the occupant. The second distance is greater than
the first distance. A fluid system is provided for delivering or
expelling air. The assembly further comprises an air passage that
extends through at least part of the lumbar portion of the cushion.
A flexible conduit is in fluid communication with the air passage
and has a first end coupled to the lumbar portion and a second end
coupled to a component of the fluid system that is substantially
stationary with respect to the lumbar portion of the cushion.
[0013] Another aspect of the present invention comprises a climate
controlled seat assembly that includes a seat cushion having an
outer surface comprising a front side for supporting an occupant in
a sitting position and a rear side wherein the rear side and the
front side generally face opposite directions. A passage extends
through the seat cushion and communicates with an opening on the
rear side of the cushion. A fluid system delivers or expels air to
or from the passage. The assembly also includes means for providing
a flexible fluid connection between the fluid system and the first
passage.
[0014] In accordance with an additional aspect of the present
invention, a climate controlled cushion is provided that comprises
an outer surface. The outer surface has a first side for supporting
at least a portion of an occupant and a second side. The second
side and the first side generally face in opposite directions. A
passage extends through at least part of the cushion and
communicates with an opening on the second side of the seat
cushion. A fluid system either delivers or expels air to the
passage via a conduit that couples the fluid system with the
passage. The conduit is expandable in length.
[0015] A further aspect of the present invention involves a method
of assembling a climate controlled seat assembly. The method
involves providing a cushion having an opening accessible from at
least one side of the cushion with the cushion being attached to a
frame. A flexible conduit is attached to the cushion so as to place
the conduit in fluidic communication with the opening. The method
further involves coupling the conduit to a fluid flow generation
device and attaching the fluid flow generation device to the
frame.
[0016] Further features and advantages of the present invention
will become apparent to those of ordinary skill in the art in view
of the detailed description of preferred embodiments which follow,
when considered together with the attached drawings and claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a perspective view of a vehicle seat assembly;
[0018] FIG. 2 is a side view of the vehicle seat assembly of FIG. 1
with a portion of the seat assembly removed;
[0019] FIG. 2A is a cross-sectional view of the vehicle seat
assembly of FIG. 1 taken along line 2A-2A of FIG. 2.
[0020] FIG. 3 is a front view of the vehicle seat assembly of FIG.
1 with a covering of the seat assembly removed;
[0021] FIG. 4 is a rear view of the vehicle seat assembly of FIG.
1;
[0022] FIG. 5 is a rear perspective view of the seat assembly of
FIG. 1 with an adjustable lumbar support device and climate control
apparatus removed;
[0023] FIG. 6 is a top view of a conduit of the vehicle seat
assembly;
[0024] FIG. 7 is a front view of the conduit if FIG. 6;
[0025] FIG. 8 is a rear view of the conduit of FIG. 6;
[0026] FIG. 9A is a schematic side view of the vehicle seat
assembly of FIG. 1 with the lumbar support device in an un-actuated
position and a flexible conduit of the climate control apparatus in
a generally un-extended state;
[0027] FIG. 9B is a schematic side view of the vehicle seat
assembly of FIG. 9A with the lumbar support device in an actuated
position and the flexible conduit in a generally extended state;
and
[0028] FIG. 10 is a side perspective view of a portion of an
adjustable lumbar support and a climate control apparatus with a
portion of the climate control apparatus shown in
cross-section.
[0029] FIG. 11 is a perspective view of an alternative embodiment
of a conduit of the vehicle seat assembly.
[0030] FIG. 11a is a front view of the conduit of FIG. 11.
[0031] FIG. 12 is a side view of the conduit of FIG. 11.
[0032] FIG. 13 is a top view of the conduit of FIG. 11.
[0033] FIG. 14 is a rear view of the conduit of FIG. 11.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0034] FIGS. 1 and 2 illustrate an exemplary embodiment of a seat
assembly 30 that comprises a seat portion 32, a backrest portion
34, an adjustable lumbar support device 36 and a climate control
apparatus 38, which will be described in detail below. When a
occupant sits in the seat assembly 30, the occupant's seat is
located generally in a seat area 40 of the seat portion 32 and at
least a portion of their legs are supported by a thigh area 42 of
the seat portion 32. In this embodiment, a rear end 44 of the seat
portion 32 is coupled to a bottom end 46 of the backrest portion
34. When the occupant sits in the seat assembly 30, the occupant's
back contacts the front surface 48 of the backrest portion 34 and
the occupant's seat and legs contact a top surface 50 of the seat
portion 32. The surfaces 48, 50 cooperate to support the occupant
in a sitting position. The seat assembly 30 can be configured and
sized to accommodate occupants of various size and weight.
[0035] In the illustrated embodiment, the seat assembly 30 is
similar to a standard automotive seat. However, it should be
appreciated that certain features and aspects of the seat assembly
30 described herein may also be used in a variety of other
applications and environments. For example, certain features and
aspects of the seat assembly 30 may be adapted for use in other
vehicles, such as, for example, an airplane, a boat, or the like.
Further, certain features and aspects of the seat assembly 30 may
also be adapted for use in stationary environments, such as, for
example, a chair, a sofa, a theater seat, a mattress, and an office
seat that is used in a place of business and/or residence.
[0036] With continued reference to FIGS. 1 and 2, the backrest 34
has a front side 54, a rear side 56, a top side 58 and a bottom
side 60. The backrest 34 includes a pair of sides 57, 59 extending
between the top side 58 and bottom side 60 for providing lateral
support to the occupant of the seat assembly 30. A lumbar region 62
of the backrest 34 is generally positioned between the sides 57, 59
of the backrest 34 near the seat portion 32.
[0037] In a similar manner, the seat portion 32 has a front side
64, a rear side 66, a top side 68 and a bottom side 70. The seat
portion 32 also includes a pair of sides 69, 71, which extending
from the rear side 66 and the front side 64 for providing lateral
support to the occupant of the seat assembly 30. In one embodiment,
the seat assembly 30 is secured to a vehicle by attaching the
bottom side 70 of the seat portion 32 to the floor of a
vehicle.
[0038] FIG. 2A is a cross-sectional view of a portion of the
backrest 34. As shown, the backrest 34 is generally formed by a
cushion 72, which is covered with an appropriate covering material
74 (e.g., upholstery). The cushion 72 is typically supported on a
metallic frame (not shown). In some embodiments, springs may be
positioned between the frame and the cushion 72. The frame provides
the seat assembly 30 with structural support while the cushion 72
provides a soft seating surface. The covering material 74 provides
an aesthetic appearance and soft feel to the surface of the seat
assembly 30. The seat portion 32 may be constructed in a similar
manner as the backrest 34.
[0039] FIG. 3 illustrates the seat assembly with the covering 74
removed thereby exposing the cushion 72. The cushion 72 can be a
typical automotive seat cushion foam or other types of materials
with suitable characteristics for providing support to an occupant.
Such materials include, but are not limited to, closed or
open-celled foam.
[0040] As shown in FIG. 3, the seat assembly is provided with a
fluid distribution system 76. The distribution system 76 comprises
an inlet passage 78 through from the front side 54 to the rear side
56 of the seat cushion 72. (See also FIG. 5). The distribution
system 76 also includes at least one, and often, a plurality of
channels 80, which extend from the inlet passage 78.
[0041] As mentioned above, the cushion 72 may be formed from a
typical automotive cushion material, such as, for example, an open
or closed cell form. In one embodiment, the cushion 72 is made of
foam that is pre-molded to form the passage 78 and/or the channels
80. In another embodiment, the passage 78 and/or the channels 80
may be formed by cutting foam out of the seat cushion 72.
[0042] With reference back to FIG. 2A, the channels 80 are covered
by a scrim 81 to define distribution passages 82 for transporting
air through the seat assembly 30. The scrim 81 includes one or more
openings 84 for delivering air to and/or from the distribution
passages 82. The scrim 81 may be formed of a material similar to
the cushion 72. In the illustrated embodiment, the scrim 81 is
attached to the cushion 72 in a manner that limits leakage between
the scrim 81 and cushion 72 thereby directing the flow of air
through the openings 84. In one embodiment, an adhesive is used to
attach the scrim 81 to the cushion 72. In other embodiments, a heat
stake or fasteners may be used.
[0043] With continued reference to FIG. 2A, a distribution layer 86
is disposed between the scrim 81 and the seat covering 74. The
distribution layer 86 spreads the air flowing through the openings
84 along the lower surface of the covering 74. To permit airflow
between the distribution layer 86 and the spaces proximal to the
front surface 48 of the backrest 34, the covering 74 may be formed
from an air-permeable material. For example, in one embodiment, the
covering 74 comprises an air-permeable fabric made of natural
and/or synthetic fibers. In another embodiment, the covering is
formed from a leather, or leather-like material that is provided
with small openings or apertures.
[0044] As will be explained in more detail below, in one
embodiment, air from the climate control apparatus 38 is delivered
to the distribution passages 82 through the inlet passage 78. The
air then flows through the openings 84 and into the distribution
layer 86. The air is then directed through the covering 74 to a
space adjacent to the front surface 48 of the backrest 34. In
another embodiment, the climate control apparatus 38 is used to
remove air, which is adjacent to the front surface 48 of the
backrest 34. In such an embodiment, the air is withdrawn through
the covering 74 and into the distribution layer 86. The air is then
withdrawn through the openings 84, into the distribution passages
82 and through the inlet passage 78.
[0045] Given the goal of distributing air through the cushion 72
and along the covering 74, those of skill in the art will recognize
that the distribution system may be modified in several different
manners. For example, the shape and/or number of channels may be
modified. In other embodiments, the scrim 81 and/or distribution
may be combined and/or replaced with other components configured
for similar functions. In yet another embodiment, a separate insert
may be positioned within the channels 80 for distributing the air.
See e.g., co-pending U.S. patent application Ser. No. 10/853,779,
filed May 25, 2004, the entire contents of which are hereby
incorporated by reference herein.
[0046] With reference now to FIGS. 1, 2 and 4, the adjustable
lumbar support device 36 is configured to provide generally for
incrementally adjusting of the contour of the front surface 48 of
the lumbar region 62 to provide variable lumbar support. In the
illustrated embodiment, the adjustable lumbar support device 36
generally comprises a lumbar support member 88 coupled to a frame
90, which is positioned on the rear side 56 of the backrest 34. The
frame 90 includes two generally vertically extending rails 91, and
the support member 88 is coupled to the frame 90 in a manner
allowing at least one of the support member's upper and lower ends
92, 93 to move along the rails 91. In the illustrated embodiment,
both the upper and lower ends 92, 93 of the support member 88 can
be slid toward each other along the rails 91 so as to bow the
support member 88 outwards in a direction towards the front surface
48 of the lumbar region 62. An actuating device (which has been
omitted to simplify the drawing) is supported by the frame 90 or
otherwise coupled to the seat. The actuating device preferably
includes one or more cables that are pulled to slide the upper and
lower ends 92, 93 of the support member 88 along the rails 91. An
electric lumbar motor or a manual device can be used to pull the
cables. When the motor or manual device relaxes the cables, the
support member 88 returns to its undeflected position. The
actuating device thus is configured to move the support member 88
between at least a first position, in which the support member 88
is positioned a first distance to the frame 90, and a second
position, in which the support member 88 is positioned a second,
farther distance from the frame 90. As the support member 88 is
moved from the first position to the second position, it pushes
against the rear side 56 of the cushion 72 generally in the
direction labeled A in FIG. 2, thereby adjusting the contour of the
front surface 48 of the lumbar region 62.
[0047] It should be appreciated that the illustrated adjustable
lumbar support device 36 represents only one exemplary embodiment.
Any of a variety of other adjustable lumbar support devices may be
used in the seat assembly 30 to adjust the contour of the lumbar
region 62 of the seat assembly 30. Such devices may include, but
are not limited to, other mechanical mechanisms and/or inflation
devices. (See e.g., U.S. Pat. Nos. 6,695,402, 5,505,520, and
5,088,790, which are hereby incorporated by reference herein.)
[0048] The climate control apparatus 38 provides a fluid flow to
either warm or cool the front side 54 of the backrest 34. The
climate control apparatus preferably provides conditioned air that
is either heated or cooled relative to the temperature of the
backrest front side 54, and either can be disposed as part of the
seat assembly or can be disposed apart from the seat assembly
(e.g., be integrated with a vehicle's air heating and cooling
system). The climate control apparatus 38 of the illustrated
embodiment will now be described in detail with continued reference
to FIGS. 1, 2 and 4. The climate control apparatus 38 preferably
includes a fluid system 94, which preferably includes a pumping
device for pumping fluid (e.g., air). In a preferred embodiment,
the fluid system 94 also includes a heat transfer device for
thermally conditioning (e.g., heating and/or cooling) the pumped
fluid. In one embodiment, the fluid system 94 comprises a heat
transfer device as described in U.S. Pat. No. 6,223,539, 6,119,463,
5,524,439 or 5,626,021, which are hereby incorporated by reference
in their entirety. In a preferred embodiment, the fluid system 94
utilizes a Peltier Circuit for cooling and/or heating the fluid. An
example of such a system is currently sold under the trademark
Micro-Thermal Module.TM. by Amerigon, Inc.
[0049] The air from the fluid system 94 is delivered to the fluid
distribution system 76 described above through a conduit 96, which
is shown in detail in FIGS. 6-8. With initial reference to these
FIGS., the conduit 96 includes body 98 having a first, inlet end
100 and a second, outlet end 102. The inlet end 100 forms a first
or inlet port 104 and the outlet end 102 forms a second or outlet
port 106. A fluid passage 108 is formed by an inner surface 110 of
the body 98. The fluid passage 108 extends from an inlet opening
112 formed by the inlet port 104 and an outlet opening 114 formed
by the outlet port 106. As shown, in the illustrated embodiment,
the passage 108 has a generally elongated oval shape, which
generally corresponds to the shape of the inlet passage 78.
However, it should be appreciated that in modified embodiments the
passage 108 may have a different shape, which is similar or
different than the shape of the inlet passage 78.
[0050] As will be explained in more detail below, the inlet port
104 is preferably coupled to a portion of the climate control
apparatus 38 that is substantially stationary. In contrast, the
outlet port 106 is preferably coupled to a portion of the climate
control apparatus 38, which is not stationary and moves with
respect to the substantially stationary portion of the climate
control apparatus 38. As such, in the one embodiment, the outlet
port 106 is coupled to the foam inlet passage 78 and is capable of
moving relative to the inlet port 104. To facilitate such movement,
at least a portion of the body 98 is flexible and/or capable of
articulated movement. In addition, it is also advantageous that the
length of the body 98 may be lengthened or shortened. Accordingly,
in the illustrated embodiment, the body 98 is formed, at least in
part, from a flexible material such as, for example, rubber, other
elastomers, flexible thermoplastics, and the like. During movement,
it is advantageous that the cross-sectional area of the passage 108
not be significantly reduced (e.g., by crimping or buckling).
Accordingly, in the illustrated embodiment, the body 98 has a
bellow-type configuration comprising a plurality of folds 116. In
this manner, as the conduit 96 bends the inner radius may shorten
while the outer radius lengthens to substantially preserve the
cross-sectional area of the fluid passage 108. In addition, the
length of the conduit 96 may be increased or decreased as the
bellows expand or contract without significantly compromising the
fluid passage 108.
[0051] Of course, those of skill in the art will recognize other
arrangements for facilitating one or more of the degrees of
movement described above. Such arrangements include, but are not
limited, to various arrangements of telescoping members, braided
conduits, flexible joints and the like.
[0052] With continued reference to FIGS. 6-8, the inlet and outlet
ends 100, 102 of the conduit 96 are preferably formed of a harder
material as compared to the flexible portions therebetween. For
example, in one embodiment, the inlet and outlet ends 100, 102 are
formed from a substantially rigid plastic while the portions of the
conduit 96 extending between the ends 100, 102 are formed from a
flexible material (e.g., rubber). The inlet and outlet ends 100,
102 may be formed from separate components that are attached to the
remaining portions using a mechanical interference (e.g., press
fit, interlocking parts, etc.) adhesives (e.g., a chemically bonded
adhesive), heat stakes, fasteners, etc. or by a plastic molding
process (e.g., over-molding such portions, co-molding, etc.).
[0053] With reference now to FIGS. 5 and 9, in the illustrated
embodiment, the outlet port 106 is coupled to the rear side 56 of
the backrest 34. As explained above, the rear side 56 of the
backrest 34 moves as the lumbar support device 36 is adjusted. To
facilitate coupling the outlet port 106 to the rear side 56 of the
backrest 34, the outlet port 106 includes a flange 120 (see also
FIG. 7), which surrounds the outlet opening 114. With reference to
FIG. 5, the rear side 56 of the backrest 34 can include a
corresponding recess 122 formed or cut from the cushion 72 for
receiving the flange 120. The recess 122 is generally positioned
about the inlet passage 78. In one embodiment, an adhesive is
placed between the flange 120 and the recess 122 to secure the
outlet end 102 of the conduit 102 to the cushion 72. In this
manner, the passage 108 is placed in fluid communication with the
fluid distribution system 76 described above. In other embodiments,
the flange 120 may be secured by belts, straps, hook and loop
fasteners, tape, etc. that extend over the edges of the flange 120
and onto the rear side of the cushion 72. Fasteners may also be
used to secure the flange 120 within the recess 122. In another
embodiment, the flange 120 may be provided with any of a variety of
snapping members or prongs that are configured to mate with
corresponding snapping members or prongs provided within the recess
122. The conduit 96 also may be secured to the cushion 72 by an
interference or friction fit. In other embodiments, the cushion 72
can be formed without a recess and the conduit 96 can be attached
to the cushion 72, preferably using one of the above-noted
ways.
[0054] It should also be appreciated that in modified embodiments,
the outlet end 102 of the conduit 96 may extend partially into or
through the inlet passage 78. In other embodiments, one or more
intermediate member(s) may be provided between the rear side 56 of
the backrest 34 and the outlet end 102 of the conduit 96.
[0055] The inlet end 100 of the conduit 96 preferably is coupled to
a substantially stationary component of the fluid system 94. In the
illustrated embodiment, which is best seen in FIG. 10, the
substantially stationary component of the fluid system 94 comprises
an outlet port 124. The fluid system 94 is coupled to the frame 90
through a bracket 126 provided on the fluid system 94 and,
consequently, the outlet port 124 of the fluid system 94 is
substantially stationary with respect to the rear side 56 of the
backrest 34.
[0056] As best seen in FIG. 10, in the illustrated embodiment, the
outlet port 124 is configured to fit at least partially within the
inlet port 104. In this manner, the fluid system 94 is placed in
fluid communication with the fluid passage 108 of the conduit 96
and the fluid distribution system 76 described above. The outlet
port 124 may be secured to the inlet port 104 in any of a variety
of manners. In the illustrated embodiment, the inlet and outlet
ports 104, 124 are provided with corresponding annular bosses 128a,
128b, which are supported within the openings defined by the ports
104, 124 by a pair of circular support members 130a, 130b that
extend from the inner surfaces of the ports 104, 124. A fastener
(not shown) may extend through the annular bosses 128a, 128b to
align and secure the ports 104, 124 to each other. In modified
embodiments, adhesives, tape, external or internal fasteners (e.g.,
clips) and the like may be used in combination or in the
alternative. In other embodiments, one end of the body 98 can be
directly coupled to the rear side 56 of the backrest 34 or to the
fluid system 94. For example, the body 98 can be directly coupled
to the fluid system 94, thereby eliminating the corresponding
ports.
[0057] It should be appreciated that in modified embodiments, the
inlet end 100 of the conduit 96 may be coupled to a different
substantially stationary component of the climate control apparatus
38. For example, in one embodiment, the inlet end 100 may be be
coupled to an intermediate conduit disposed between the fluid
system 94 and the conduit 96. In such an embodiment, the outlet of
the intermediate conduit may be substantially stationary with
respect to the outlet end 102 of the conduit 96.
[0058] The illustrated embodiment has several advantages. For
example, because of the relative movement between the inlet and
outlet ends 100, 102 of the conduit 96, the inlet passage 78 may be
positioned in the adjustable lumbar region 62 of the backrest 34.
That is, the inlet passage 78 may be located in a portion of the
cushion 72 that moves in response to the adjustable lumbar support
device 36. In the prior art, the inlet passage 78 has been placed
above the lumbar region 62 because movement of the lumbar region 62
would often compromise the connections between the climate control
apparatus 38 and the distribution system 76 if the connection were
placed in this movable region. The illustrated embodiment addresses
these design concerns by providing a conduit 96 that permits
relative movement between its ends. As schematically illustrated in
FIGS. 9A and 9B, the outlet end 102 of the conduit 96 can move in
response to the movement of the lumbar region 62 while the inlet
end 100 remains attached to the relatively stationary components of
the climate control apparatus 38, which can lie within a fixed
plane as by the reference line 1.
[0059] FIG. 10 illustrates another advantage of the illustrated
embodiment. As shown, the conduit 96 extends through an opening 132
formed in the support member 88 of the adjustable lumbar support
device 36. By extending the conduit 96 through at least a portion
of the lumbar support device 36, the fluid system 94 can be located
generally behind the adjustable lumbar support device 36. This
reduces the length of the ducting between the fluid system 94 and
the distribution system 76 resulting in less pumping losses. In
some embodiments, the fluid system 94 may be distanced from the
rear side 56 of the backrest 34. For example, the fluid system 94
may be placed under the seat 32. In such an embodiment, an
intermediate duct may direct fluid to the distribution system. The
length of such an intermediate duct is shorted by positioning the
inlet passage 78 in the lumbar region 62 and permitting the conduit
96 to extend through at least a portion of the lumbar support
device 36.
[0060] Certain features and aspect of the above-described
embodiments are also advantageous in arrangements in which the seat
assembly 30 does not include an adjustable lumbar support device or
when the inlet passage 78 is positioned outside (e.g., above) the
lumbar region 62. For example, as mentioned above, existing climate
control systems have used a rigid connection between the channels
and passages formed in the cushion of the seat and the climate
control device. The rigid connection creates a region of rigidity
in the seat cushion, thereby degrading the feel and comfort of the
seat. In contrast, the above described embodiments provide a
flexible connection between the fluid distribution system 76 and
the fluid system 94. This results in a more comfortable seat
assembly 30.
[0061] In operation, fluid in the form of air can be delivered from
the fluid system 94 through the conduit 96 and into the inlet
passage 78 and the distribution system 76. As described above, the
air flows through the passages 82, into the openings 84 and then
along the distribution layer 86 and through the covering 74. In
this manner, conditioned air can be provided to the front surface
48 of the backrest 34.
[0062] In a modified embodiment, air from within the passenger
compartment of the automobile can be drawn through the covering 74,
into the distribution layer 86 and through the openings 84. The air
then can flow through the distribution passages 82, into the inlet
passage 78 and then into the conduit 96. In this manner, the
climate control apparatus 38 can provide suction so that air near
the surface of the seat assembly 30 is removed.
[0063] While the flexible conduit 96 has been shown and described
as interconnecting a ventilation system within a backrest cushion
to a climate control apparatus, which is fixed to the backrest
frame, the flexible conduit 96 can be used in other application as
well. For example, the flexible conduit can be used to interconnect
a climate control apparatus (e.g., a thermal-electric device or an
Freon-based air conditioning unit), which is fixed to a vehicle, to
a lower side of the seat assembly. In accordance with a more
detailed example, the climate control apparatus can be fixed to the
vehicle underneath the seat assembly. The flexible conduit then can
interconnect the climate control apparatus to an inlet of the seat
ventilation system. The inlet can be formed either on the bottom or
sides of the seat portion or the backrest portion of the seat
assembly. The flexible conduit would allow movement of the seat
relative to the stationary portion of the climate control
apparatus, thereby permitting the seat to be slid, raised, tilted,
or inclined without crimping or buckling the fluid passage between
the climate control apparatus and the seat assembly.
[0064] To assist in the description of the disclosed embodiments,
words such as upward, upper, downward, lower, vertical, horizontal,
upstream, and downstream have and used above to describe the
accompanying figures. It will be appreciated, however, that the
illustrated embodiments can be located and oriented in a variety of
desired positions.
[0065] FIGS. 11-14 illustrate a modified embodiment of the conduit
96 described above. Reference numerals used to refer to components
in FIGS. 11-14 correspond to those used for earlier components
except that a prime (') symbol has been added. Similarly, the
numbered components are substantially the same as those in
alternative embodiments, except where differences are
described.
[0066] The conduit 96' has first, inlet and second, outlet ends
100', 102' connecting a fluid passage 108'. The inlet end 100'
forms a first fluid port 104' and the outlet end 102' forms a
second fluid port 106'. In the illustrated embodiment, the fluid
passage 108' has a generally oval shape. The first and second ends
100', 102' generally match the shape of the fluid passage 108'. In
some embodiments, the first port 104' and second port 106' have the
same shape, and in other embodiments, the ports 104', 106' have
dissimilar shapes. Additionally, the ports 104', 106' can
individually or together have the same general shape as the fluid
passage 108', or any one of the components can have a unique shape
or size.
[0067] The second fluid port 106' can terminate in a flange 120'.
The flange 120' can be sized or shaped to be received in a
corresponding recess formed or cut in the seat cushion (not shown).
The flange 120' can be formed integrally with the second fluid port
106', or the port 106' can be coupled to the flange 120'. The
coupling can be achieved with a cement, glue, epoxy, or other
joining material or method such as a plastic molding process. In
some embodiments, the flange 120' and second port 106' can be
connected by an interference fit. In some embodiments, the first
fluid port 104' can preferably comprise a mating face 200. The
mating face 200 can extend out from around the first fluid port
104' along some or all of the perimeter of the first port. In the
illustrated embodiment, embodiment, the mating face 200 comprises a
ring 206 in generally the shape of the first fluid port 104' and
two outwardly-extending protrusions 202. In some embodiments, the
mating face 200 can have a larger or smaller ring 206 face and a
larger or smaller number of protrusions 202.
[0068] Additionally, the first fluid port 104' can comprise an
engagement prong 210. In the illustrated embodiment, the prong 210
extends outwardly from a cross-beam 208 disposed across the first
fluid port 104'. In some embodiments, the cross-beam 208 is
oriented across the short axis of the first fluid port 104', though
in other embodiments, the cross-beam 208 may be disposed across the
long axis or, in circular embodiments, connect any chord of the
port.
[0069] The prong 210 can extend at least partially beyond the
mating face 200, as shown in the illustrated embodiment. The prong
210 can have a single post comprising a bulbous end. In other
embodiments, the prong 210 can comprise two or more extension
members 212 each ending in a tab or notch. In the illustrated
embodiment, the prong 210 comprises two extension members 212, each
ending in an engagement tab 214.
[0070] In some embodiments, the prong 210 can engage a socketed
section 130b of the climate control apparatus 38 (see FIG. 10). The
engagement prong 210 can be inserted into this generally circular
socket 130b. In the illustrated embodiment, the two extension
members 212 bend slightly inward as the engagement tabs 214 pass
through the socket 130b, and return to their unbent position once
the tabs 214 have passed through the socket 130b. As the diameter
of the prong 210 around the extension members 212 is generally
smaller than the diameter of the prong 210 around the tabs 214, the
socket 130b can rest easily around the extension members 212. The
tabs 214 can be constructed to have a tapering shape, thereby
easing the passing of the tabs 214 through the socket 130b. A
skilled practitioner in the art will recognize this type of clip
engagement as being generally one-way, as the engagement tabs 214
do not readily deflect inward to permit the disengagement of the
prong 210 from the socket 130b. Additionally, other shapes and
types of prongs 210 can be used, as well as broader, narrower,
thinner, and thicker sockets, as necessitated for firm engagement
of the conduit 96' to the climate control apparatus 38.
[0071] In some embodiments, the socket engagement 130b extends the
length of the transfer members 212, resulting in a tight engagement
between the conduit 96' and the climate control apparatus 38. In
some embodiments, the socket 130b extends only slightly, or
partially, along the extension members 212, and the conduit 96' can
have greater movement relative to the climate control device.
[0072] Preferably, the conduit 96' tightly engages the climate
control apparatus device, as secured by the prong 210 and socket
130b. Accordingly, fluid transferred through the first fluid port
104' into the fluid passage 108' from the climate control device is
generally well-confined, with little to none of the fluid leaking
to the ambient environment. Thus, a firm seal between the climate
control apparatus 38 and the conduit 96' can be established without
the use of an adhesive sealing method or material. Additionally,
the manufacturing of the conduits 96' can be adapted to connect the
conduit 96' to the climate control apparatus 38 without a glue or
adhesive, thereby reducing the complexity and cost of
manufacturing. Differently-shaped conduits 96' can also be
produced; however, as long as the first fluid port 104' and mating
face 200 remain consistent, differently-shaped conduits 96' adapted
to different seats can be connected to a standard-shaped climate
control apparatus 38. Similarly, different climate control
apparatuses 38 can connect to each conduit 96' with a
standard-sized mating face 200 and first fluid port 104'.
Additionally, an adapter can be connected between the first fluid
port 104' and the climate control apparatus 38, enabling
incongruently-sized components to properly confine and transport
fluid from the apparatus 38 to the fluid passage 108'.
[0073] With reference now to FIG. 11a, a front surface of the
flange 120' can include one or more hook and loop, burr or touch
fasteners 220 (i.e., Velcro.TM.), which have a corresponding part
formed on a portion of the seat assembly. In the illustrated
embodiment, a pair of fasteners 220 is provided on opposite sides
of the opening 102'. Accordingly, in one embodiment of use, the
touch fasteners 220 can be used to couple the flange 120 to the
seat assembly while the prong 210 described above can be used to
couple the conduit 96' to the outlet 100 of the climate control
apparatus 38. In this manner, the conduit 96' can be used to
connect the climate control apparatus 38 to the fluid distribution
system 76 with no tools. Advantageously, the protrusions 202 can be
used to grip the conduit 96 as the prong 210 is inserted into the
socket 130b of the climate control apparatus 38. It should be
appreciated that the touch fasteners 220 and/or prong 210 features
can also be used in a conduit that does not include the bellows
arrangement described.
[0074] In a modified embodiment, in addition to or as an the
alternative to the touch fasteners 220, the flange 120' and/or the
second fluid port 106 can be configured to provide a mechanical fit
between the conduit and the ventilation system. The mechanical fit
can be provided by a press fit and/or interlocking components
(e.g., prongs and recesses). For example, in one embodiment, the
foam which forms the cushion of the seat can be modified such that
the second port 106 can be press fit and/or snap fit directly into
the cushion of the seat assembly.
[0075] Although the foregoing description of the preferred
embodiments has shown, described, and pointed out certain novel
features, it will be understood that various omissions,
substitutions, and changes in the form of the detail of the
apparatus as illustrated, as well as the uses thereof, may be made
by those skilled in the art without departing from the spirit of
this disclosure. Consequently, the scope of the present invention
should not be limited by the foregoing discussion, which is
intended to illustrate rather than limit the scope of the
invention.
* * * * *