U.S. patent application number 16/546902 was filed with the patent office on 2019-12-12 for flex duct connection system.
The applicant listed for this patent is Owens Corning Intellectual Capital, LLC. Invention is credited to Clarke Berdan, II, Neil Robert Hettler, Katrina Keeley, Weigang Qi, James Rinne, Mark Howard Smith, Frank Sidney Tyler, David H. Wolf.
Application Number | 20190376630 16/546902 |
Document ID | / |
Family ID | 56888539 |
Filed Date | 2019-12-12 |
View All Diagrams
United States Patent
Application |
20190376630 |
Kind Code |
A1 |
Smith; Mark Howard ; et
al. |
December 12, 2019 |
FLEX DUCT CONNECTION SYSTEM
Abstract
An exemplary duct system includes a rigid duct member, a first
duct connector connected to the rigid duct member, a first sealing
member disposed between the rigid duct member and the first duct
connector, a flexible duct, a second duct connector connected to
the flexible duct, and a second sealing member disposed between the
first duct connector and the second duct connector. The first duct
connector is assembled to the second duct connector to compress the
second sealing member and form a seal between the first duct
connector and the second duct connector and thereby form a seal
between the rigid duct member and the flexible duct.
Inventors: |
Smith; Mark Howard; (Newark,
OH) ; Hettler; Neil Robert; (Granville, OH) ;
Keeley; Katrina; (Westerville, OH) ; Qi; Weigang;
(Westerville, OH) ; Wolf; David H.; (Newark,
OH) ; Berdan, II; Clarke; (Granville, OH) ;
Tyler; Frank Sidney; (Westerville, OH) ; Rinne;
James; (Granville, OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Owens Corning Intellectual Capital, LLC |
Toledo |
OH |
US |
|
|
Family ID: |
56888539 |
Appl. No.: |
16/546902 |
Filed: |
August 21, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15068987 |
Mar 14, 2016 |
10422458 |
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16546902 |
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62132628 |
Mar 13, 2015 |
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62168979 |
Jun 1, 2015 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F24F 13/0209 20130101;
F24F 13/0218 20130101; F16L 33/00 20130101; F16L 41/08
20130101 |
International
Class: |
F16L 33/00 20060101
F16L033/00 |
Claims
1. A duct system comprising: a rigid duct member; a first duct
connector connected to the rigid duct member; a first sealing
member disposed between the rigid duct member and the first duct
connector; a flexible duct; a second duct connector connected to
the flexible duct; and a second sealing member disposed between the
first duct connector and the second duct connector; wherein the
first duct connector is assembled to the second duct connector to
compress the second sealing member and form a seal between the
first duct connector and the second duct connector and thereby form
a seal between the rigid duct member and the flexible duct.
2. The duct system of claim 1, wherein the first duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface; a mating portion disposed at the
first end of the tube portion; and a flange portion disposed on the
outer surface of the tube portion at the first end, the flange
portion having a front side, a back side, and an opening.
3. The duct system of claim 1, wherein the first duct connector
includes: one or more securing members having a first end and a
second end, the first end disposed at the front side of the flange
portion and the second end disposed at the second end of the tube
portion; and one or more tab members attached to the second end of
the one or more securing members, wherein the tab members are moved
between an un-deployed and a deployed position by the one or more
securing members.
4. The duct system of claim 1, wherein the second duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface, the second end including an annular
ridge disposed on the outer surface.
5. The duct system of claim 1, wherein the second duct connector
includes: a mating portion disposed at the first end of the tube
portion; and a flange portion disposed on the outer surface of the
tube portion at the first end, the flange portion having a front
side, a back side, an opening, and an annular collar portion
extending axially toward the second end of the tube portion, the
annular collar portion having an outer surface and an annular ridge
disposed on the outer surface.
6. A duct system comprising: a rigid duct; a first duct connector
connected to the rigid duct member; a first sealing member disposed
between the rigid duct member and the first duct connector; a
flexible duct; a second duct connector connected to a first end of
the flexible duct; a second sealing member disposed between the
first duct connector and the second duct connector; a third duct
connector connected to a second end of the flexible duct; a duct
outlet boot; a fourth duct connector connected to the outlet boot;
a third sealing member disposed between the third duct connector
and the fourth duct connector; wherein the first duct connector is
assembled to the second duct connector to compress the second
sealing member and form a seal between the first duct connector and
the second duct connector and thereby form a seal between the rigid
duct and the flexible duct; and wherein the third duct connector is
assembled to the fourth duct connector to compress the third
sealing member and form a seal between the third duct connector and
the fourth duct connector and thereby form a seal between the
flexible duct and the outlet boot.
7. The duct system of claim 6, wherein the first duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface; a mating portion disposed at the
first end of the tube portion; and a flange portion disposed on the
outer surface of the tube portion at the first end, the flange
portion having a front side, a back side, and an opening.
8. The duct system of claim 6, wherein the first duct connector
includes: one or more securing members having a first end and a
second end, the first end disposed at the front side of the flange
portion and the second end disposed at the second end of the tube
portion; and one or more tab members attached to the second end of
the one or more securing members, wherein the tab members are moved
between an un-deployed and a deployed position by the one or more
securing members.
9. The duct system of claim 6, wherein the second duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface, the second end including an annular
ridge disposed on the outer surface.
10. The duct system of claim 6, wherein the second duct connector
includes: a mating portion disposed at the first end of the tube
portion; and a flange portion disposed on the outer surface of the
tube portion at the first end, the flange portion having a front
side, a back side, an opening, and an annular collar portion
extending axially toward the second end of the tube portion, the
annular collar portion having an outer surface and an annular ridge
disposed on the outer surface.
11. The duct system of claim 6, wherein the third duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface, the second end including an annular
ridge disposed on the outer surface; a mating portion disposed at
the first end of the tube portion; and a flange portion disposed on
the outer surface of the tube portion at the first end, the flange
portion having a front side, a back side, an opening, and an
annular collar portion extending axially toward the second end of
the tube portion, the annular collar portion having an outer
surface and an annular ridge disposed on the outer surface.
12. The duct system of claim 6, wherein the fourth duct connector
includes: a tube portion having a first end, a second end, an outer
surface, and an inner surface; a mating portion disposed at the
first end of the tube portion; a flange portion disposed on the
outer surface of the tube portion at the first end, the flange
portion having a front side, a back side, and an opening; one or
more securing members having a first end and a second end, the
first end disposed at the front side of the flange portion and the
second end disposed at the second end of the tube portion; and one
or more tab members attached to the second end of the one or more
securing members, wherein the tab members are moved between an
un-deployed and a deployed position by the one or more securing
members.
Description
RELATED APPLICATIONS
[0001] This application is a division of U.S. application Ser. No.
15/068,987, filed on Mar. 14, 2016, which claims priority to and
the benefit of U.S. Provisional Application No. 62/132,628, filed
on Mar. 13, 2015, and U.S. Provisional Application No. 62/168,979,
filed on Jun. 1, 2015, each of which are incorporated herein by
reference in their entireties.
TECHNICAL FIELD
[0002] The present invention relates to ducts, duct connectors, and
duct connection systems. More particularly, a duct connection
system that provides for reliable and quickly made connections
between rigid and/or flexible ducts.
BACKGROUND OF THE INVENTION
[0003] Ducts and conduits are used to convey air in building
heating, ventilation, and air conditioning (HVAC) systems.
Typically, the ducts in a residential building or home are arranged
in a trunk and branch configuration. A plenum or trunk conveys air
from an air handler of a HVAC system through various ducts and
distribution boxes to smaller branch ducts that carry air to
individual rooms of the home.
[0004] Many ducts, particularly trunk ducts and plenums, are formed
of sheet metal and are rigid. Rigid ducts can be made from a wide
variety of materials, such as, for example, sheet metal, duct
board, foam board, or any other suitably rigid material. Larger
ducts and distribution boxes may be formed of duct board, a rigid
insulating material formed of an insulation layer and a reinforcing
layer. Branch ducts may be rigid sheet metal ducts or flexible
ducts. Flexible ducts are typically formed of a wire-reinforced
core, an insulation layer, and an outer sheath. Ducts may terminate
at duct boots that connect the ducts to air registers arranged in
the floor, walls, or ceiling of a room.
[0005] These ducts and distribution boxes may be located in
conditioned or unconditioned portions of the building. Leaks from
connections between ducts in unconditioned spaces of a home, such
as the attic, contribute to energy loss from the HVAC system
because conditioned air is leaked into an unconditioned space,
rather than being conveyed to the conditioned rooms of the
building.
[0006] Existing methods of connecting flexible ducts to rigid ducts
made of stainless or galvanized steel or duct board include sheet
metal screws, mastic, adhesive tape, and plastic ties. These
methods may be used on their own or in concert to connect ducts
together. Mastic is a non-hardening adhesive compound that may be
used on its own or with a reinforcing material such as fiberglass
mesh tape.
SUMMARY
[0007] Exemplary embodiments of ducts, duct connectors, and duct
connection systems are disclosed herein.
[0008] In one exemplary embodiment, a duct system includes a rigid
duct, a first duct connector connected to the rigid duct, a first
sealing member disposed between the rigid duct and the first duct
connector, a flexible duct, a second duct connector connected to
the flexible duct, and a second sealing member disposed between the
first duct connector and the second duct connector. The first duct
connector is assembled to the second duct connector to compress the
second sealing member and form a seal between the first duct
connector and the second duct connector and thereby form a seal
between the rigid duct and the flexible duct.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] These and other features and advantages of the present
invention will become better understood with regard to the
following description and accompanying drawings in which:
[0010] FIG. 1 is a perspective view of an exemplary duct connection
system;
[0011] FIG. 1A is a cross-sectional view of the exemplary duct
connector of FIG. 1 in an assembled condition;
[0012] FIG. 1B is an illustration of the profile of an exemplary
pair of interlocking annular ridges of the mating surfaces of the
duct connectors of FIGS. 1 and 1A;
[0013] FIG. 1C is an illustration of the profile of an exemplary
pair of interlocking annular ridges of the mating surfaces of the
duct connectors of FIGS. 1 and 1A;
[0014] FIG. 2 schematically illustrates a duct system;
[0015] FIG. 3 is a perspective view of a female end of an exemplary
duct connector assembled to duct board;
[0016] FIG. 3A is a cross-sectional view of the exemplary duct
connector of FIG. 3;
[0017] FIG. 3B is a cross-sectional view of an exemplary
single-piece duct connector assembled to duct board;
[0018] FIG. 3C is a front view of the exemplary duct connector of
FIG. 3B;
[0019] FIG. 3D is a perspective view of the exemplary duct
connector of FIG. 3B assembled to duct board;
[0020] FIG. 4 is a perspective view of a female end of an exemplary
duct connector;
[0021] FIG. 5 is a front perspective view of the exemplary duct
connector of FIG. 4 assembled to duct board;
[0022] FIG. 6 is a rear perspective view of the exemplary duct
connector of FIG. 4 assembled to duct board with mounting tabs in
an un-deployed position;
[0023] FIG. 7 is a rear perspective view of the exemplary duct
connector of FIG. 4 assembled to a piece of duct board with
mounting tabs in a deployed position;
[0024] FIG. 8 is a perspective view of an exemplary duct connector
assembled to a core tube of a flexible duct;
[0025] FIG. 8A is a cross-sectional view of the exemplary duct
connector and core tube of FIG. 8;
[0026] FIG. 8B is a cross-sectional view of the exemplary duct
connector and core tube of FIG. 8 without a collar 170;
[0027] FIG. 9 is a perspective view of the exemplary duct connector
and core tube of FIG. 8 wrapped in an insulation layer;
[0028] FIG. 9A is a cross-sectional view of the exemplary duct
connector, core tube, and insulation layer of FIG. 9;
[0029] FIG. 10 is a perspective view of an exemplary duct
connector, core tube, and insulation layer of FIG. 9, wrapped with
an insulating sheath;
[0030] FIG. 10A is a cross-sectional view of the exemplary duct
connector, core tube, insulation layer, and insulating sheath of
FIG. 10;
[0031] FIG. 11 is a cross-sectional view of the exemplary duct
connector of FIG. 10 with a damper;
[0032] FIG. 12 is a cross-sectional view of a female connector of
an exemplary duct connector assembled to duct board in an
un-expanded position;
[0033] FIG. 13 is a cross-sectional view of a female connector of
an exemplary duct connector assembled to duct board in an expanded
position;
[0034] FIG. 14 is a perspective exploded view of an exemplary duct
connector and duct board;
[0035] FIG. 15 is a front perspective view of the exemplary duct
connector of FIG. 14 assembled to duct board in an un-expanded
position;
[0036] FIG. 16 is a rear perspective view of the exemplary duct
connector of FIG. 14 assembled to duct board in an un-expanded
position;
[0037] FIG. 17 is a front perspective view of the exemplary duct
connector of FIG. 14 assembled to duct board in an expanded
position;
[0038] FIG. 18 is a rear perspective view of the exemplary duct
connector of FIG. 14 assembled to duct board in an expanded
position;
[0039] FIG. 19 is a cross-sectional view of the exemplary duct
connector of FIG. 14 assembled to duct board in an un-expanded
position;
[0040] FIG. 20 is a cross-sectional view of the exemplary duct
connector of FIG. 14 assembled to duct board in an expanded
position;
[0041] FIG. 21 is a cross-sectional exploded view of an exemplary
duct connector;
[0042] FIG. 22 is a cross-sectional view of an exemplary duct
connection system;
[0043] FIG. 23 is a cross-sectional view of an exemplary duct
adaptor;
[0044] FIG. 23A is an illustration of a profile of an exemplary
gasket of the duct adapter of FIG. 23;
[0045] FIG. 23B is an illustration of a profile of an exemplary
gasket of the duct adapter of FIG. 23;
[0046] FIG. 24 is a cross-sectional view of an exemplary duct
adaptor;
[0047] FIG. 25 is a cross-sectional view of an exemplary duct
adaptor;
[0048] FIG. 26 is a cross-sectional view of an exemplary duct
adaptor;
[0049] FIG. 27 is a cross-sectional view of an exemplary duct
adaptor;
[0050] FIG. 27A is an illustration of the profile of an exemplary
groove of the duct adapter of FIG. 27;
[0051] FIG. 27B is an illustration of the profile of an exemplary
groove of the duct adapter of FIG. 27;
[0052] FIG. 27C is an illustration of the profile of an exemplary
groove of the duct adapter of FIG. 27;
[0053] FIG. 28 is a cross-sectional view of an exemplary
right-angle duct boot with a securing ring in a disassembled
condition;
[0054] FIG. 28A is a cross-sectional view of the exemplary
right-angle duct boot of FIG. 28 with a securing ring in an
assembled condition;
[0055] FIG. 29 is a cross-sectional view of an exemplary straight
duct boot with a securing ring in a disassembled condition;
[0056] FIG. 29A is a cross-sectional view of the exemplary straight
duct boot of FIG. 29 with a securing ring in an assembled
condition;
[0057] FIG. 29B is a cross-sectional view of the exemplary straight
duct boot of FIG. 29 with a securing ring in an assembled
condition;
[0058] FIG. 29C is a cross-sectional view of the exemplary straight
duct boot of FIG. 29 with a securing ring in an assembled
condition;
[0059] FIG. 30 is a cross-sectional view of the exemplary straight
duct boot of FIG. 29 with a cover grate in a disassembled
condition;
[0060] FIG. 30A is a cross-sectional view of the exemplary straight
duct boot of FIG. 29 with a cover grate in an assembled
condition;
[0061] FIG. 31 is a cross-sectional view of an exemplary duct boot
with a securing ring in a disassembled condition;
[0062] FIG. 32 is a cross-sectional view of an exemplary duct boot
retention system in a disassembled condition;
[0063] FIG. 32A is a cross-sectional view of the exemplary duct
boot retention system of FIG. 32 in an assembled condition;
[0064] FIG. 33 is a perspective view of an exemplary duct boot
retention system; and
[0065] FIG. 33A is a cross-sectional view of an exemplary duct boot
retention system that is similar to the system of FIG. 33.
DETAILED DESCRIPTION
[0066] Prior to discussing the various embodiments, a review of the
definitions of some exemplary terms used throughout the disclosure
is appropriate. Both singular and plural forms of all terms fall
within each meaning.
[0067] As described herein, when one or more components are
described as being connected, joined, affixed, coupled, attached,
or otherwise interconnected, such interconnection may be direct as
between the components or may be indirect such as through the use
of one or more intermediary components. Also as described herein,
reference to a "member," "component," or "portion" shall not be
limited to a single structural member, component, or element but
can include an assembly of components, members or elements.
"Physical communication" as used herein, includes but is not
limited to connecting, affixing, joining, attaching, fixing,
fastening, placing in contact two or more components, elements,
assemblies, portions or parts. Physical communication between two
or more components, etc., can be direct or indirect such as through
the use of one or more intermediary components and may be
intermittent or continuous.
[0068] In the embodiments discussed herein, the connector
arrangements of the present application are described for use with
ducts. However, the connector arrangements of the present
application may be used in a variety of different applications. The
present patent application specification and drawings provide
multiple embodiments of connector arrangements and duct connector
assemblies. Any feature or combination of features from each of the
embodiments may be used with features or combinations of features
of other embodiments.
[0069] FIGS. 1 and 1A illustrate an exemplary embodiment of a duct
connection system 100 for connecting flexible ducts to rigid ducts
and plenums in a residential building HVAC system. The illustrated
duct connection system 100 includes a first duct connector 101 and
a second duct connector 102. The illustrated duct connectors 101,
102 are generally round in shape, though they may be any shape
appropriate for connection to flexible ducts. In the illustrated
embodiment, the first duct connector 101 is a female connector and
the second duct connector 102 is a male connector. In another
embodiment, the first duct connector is a male connector, and the
second duct connector is a female connector.
[0070] Though the illustrated embodiment of FIGS. 1 and 1A shows a
connection system for connecting a flexible duct to rigid duct, the
connection system may be used to connect two flexible duct
segments, or two ducts that are rigid. Flexible duct segments could
also be sold in various pre-cut lengths with connectors
pre-assembled to each end. Similarly, pre-made fittings could
include the duct connectors of the duct connection system of the
present invention to allow for easier assembly and installation of
a flexible duct system in a residential structure.
[0071] The first duct connector 101 is shown inserted into an
opening 105 in a piece of duct board 103. The first duct connector
101 includes a central tube 110, a flange 120, a flange sealing
member 122, one or more securing members 130, and a mating portion
140. The central tube 110 has a first end 112, a second end 114, an
outer surface 116, and an inner surface 118. The flange 120 is
rigidly connected to the first end 112 of the tube portion 110 and
includes a front surface 124 and a back surface 126. The mating
portion 140 of the first duct connector 101 comprises a female
connection and is disposed on the inner surface 118 of the central
tube 110 of the connector 100. The central tube 110 surrounds an
interior 115 of the first duct connector 101 through which air
flows. The one or more securing members 130 are disposed within the
flange portion 120 of the first duct connector 101 and are used to
secure the first duct connector 101 to the duct board 103. The
securing members 130 may be any type of securing member, such as,
for example, a threaded fastener, a rivet, a deployable fastener,
an expanding anchor, or the like. As shown in FIGS. 3-7, the
securing members may also transition from an un-deployed to a
deployed position to secure the first duct connector to a portion
of duct board.
[0072] The flange sealing member 122 provides an air-tight seal
between the duct board 103 and first duct connector 101. The flange
sealing member 122 has an outer profile 128 that is larger than the
opening 105 in the duct board 103 for the first duct connector 101,
and an opening 123 that is larger than the outer surface 116 of the
central tube 110 of the first duct connector 101. A seal is created
between the flange sealing member 122 and the duct board 103, and
between the flange sealing member 122 and the back side 126 of the
flange 120 of the first duct connector 101. The flange sealing
member 122 may be attached to the duct board 103, the first duct
connector 101, or both components, by any connecting means, such
as, for example, an adhesive connection, a threaded connection, a
fastener connection, or the like. The flange sealing member 122 may
also be compressed between the flange 120 and the duct board
103.
[0073] The second duct connector 102 is shown assembled to a
segment of flexible duct 104 in FIG. 1 and is shown without
flexible duct in FIG. 1A. The second duct connector 102 includes a
central tube 150, a flange 160, a connection sealing member 162, a
collar 170, and a mating portion 180. The central tube 150 has a
first end 152, a second end 154, an outer surface 156, and an inner
surface 158. The second end 154 of the central tube 150 is tapered
153 to receive a core tube of the flexible duct 104. The central
tube 150 surrounds an interior 155 of the second connector 102
through which air flows. A fastener (not shown) and an annular
ridge 151 located on the outer surface 156 of the tube 150 prevents
the reinforced core (not shown) of a flexible duct 104 from sliding
off the central tube 150 of the second duct connector 102 during
installation and use.
[0074] The flange 160 is rigidly connected to the first end 152 of
the central tube 150 and includes a front surface 164 and a back
surface 166. The collar 170 extends from the back surface 166 of
the flange 160 to its end 172. The collar 170 has an inner surface
176 and an outer surface 178. The end 172 of the collar 170 is
tapered 173 to receive an outer sheath 106 of a flexible duct 104.
A fastener 107 is secured around the outer sheath 106 behind and an
annular ridge 171 on the outer surface 176 of the collar 170
prevents the outer sheath 106 of a flexible duct 104 from sliding
off the collar 170 of the second duct connector 102 during
installation and use. The radial gap 165 between the inner surface
178 of the collar 170 and the outer surface 156 of the central tube
150 receives an insulation layer (see FIGS. 9, 10) of the flexible
duct 104. The mating portion 180 of the second duct connector 102
is located at the first end 152 of the central tube 150 and
comprises a male connection.
[0075] Referring now to FIG. 1A, the connection sealing member 162
provides an air-tight seal between the first duct connector 101 and
the second duct connector 102 when they are connected by their
corresponding mating portions 140, 180. The connection sealing
member 162 has an outer profile 168 that is larger than the inner
surface 118 of the central tube 110 of the first duct connector
101, and an opening 163 that is larger than the mating portion 180
of the second connector 102. A seal is created between the
connection sealing member 162 and the front sides 124, 164 of the
flanges 120, 160 of the first and second duct connectors 101, 102
when they are connected by their mating portions 140, 180. When the
first and second duct connectors 101, 102 are connected, air can
flow freely through the interiors 115, 155 of the first and second
connectors 101, 102.
[0076] The mating portions 140, 180 of the first and second duct
connectors 101, 102 each have a mating surface 142, 182. In the
illustrated embodiment, the mating surfaces 142, 182 of the first
and second duct connectors each include one or more ridges 144,
184. When the male connector is inserted into the female connector,
the ridges on an outer mating surface of the male connector engage
with the ridges on the inner mating surface of the female
connector, forming a secure connection. A cross-section of one pair
of ridges 144, 184 is illustrated in FIG. 1B. As shown in FIG. 1B,
the ridges are configured such that they slide past each other only
in one direction. Any number of ridges may be included on the
mating surfaces of the male and female connectors. Though the
mating surfaces are shown with ridges, any type of locking
connection between the mating surfaces may be used, such as, for
example, a quarter turn connection, an adhesive connection, a
threaded connection, a locking connection that has a locking and
releasing position, or the like. Though the mating portions 140,
180 of the first and second duct connectors 101, 102 are shown with
male and female connections, any means of connection can be used,
such as, for example, a flange and fastener connection, a flange
and clamp connection, a threaded collar connection, a snap-fit
connection, or the like.
[0077] In another exemplary embodiment, shown in FIG. 1C, a
releasing ridge 146 is included on one of the male or female mating
surfaces such that the interlocking ridges 144, 184 release when
the connectors are pressed together enough so that the locking
ridges can separate. Though the decoupling mechanism shown is an
annular ridge with a ramp-like profile, any decoupling means may be
used, such as, for example, features on the mating surfaces that
separate the hook-shaped ridges when the connection is twisted.
[0078] In another exemplary embodiment, the mating portions 140,
180 of the first and second duct connectors 101, 102 include a cam
lock connection (not shown). To connect the first and second duct
connectors 101, 102, the mating portions 140, 180 are pressed
together and twisted until at least one pin on one mating portion
is secured within a slot on the other mating portion. The
connection sealing member 162 is sufficiently elastic to withstand
being compressed when the cam lock connection is made, and to
maintain an air tight seal after the cam lock mating portions are
connected. The cam lock connection requires a small amount of
turning to create a connection, such as, for example, less than 1/4
of a turn, less than 1/8 of a turn, or another small amount.
[0079] FIG. 2 is a schematic diagram of the trunk and branch layout
of a heating, ventilation, and air conditioning (HVAC) system 200
typically found in a residential building. Air from an air handler
(not shown) flows through a plenum 210 and then through
intermediate ducts 220 and junction boxes 230 to distribution boxes
240 and then through branch ducts 250 that terminate in various
rooms of a house. The branch ducts 250 in many cases are flexible
ducts. The duct connection system illustrated in FIGS. 1 and 1A may
be used in any connection 260 between a flexible branch duct 250
and a distribution box 240 or other rigid duct.
[0080] When assembling a flexible duct to a rigid distribution box
230, the installer will frequently have access only to the exterior
of the distribution box, making it difficult to install any support
structures on the interior of the distribution box to better secure
a duct connector and flexible duct to the box. The securing members
130 of the first duct connector 101, on the other hand, can be
deployed from the flange side of the connector. This allows an
installer to secure the first duct connector to a distribution box
without having to disassemble the box or reach inside through the
opening created for the duct connector.
[0081] Referring now to FIGS. 3 and 3A, the exemplary first duct
connector 101 is shown installed in the duct board 103 in more
detail. The securing members 130 shown in FIGS. 3 and 3A are
movable between an undeployed and deployed position. The first duct
connector 101 of FIG. 3 includes three securing members, though any
number of securing members may be used to assemble the first
connector to duct board. Each securing member 130, as shown in FIG.
3A, includes a shaft 330 with a first end 332 and a second end 334,
a head 336, and a tab member 338. Each tab member 338 has a paddle
portion 333 that is rigidly attached to a base 331 that is movably
attached to the shaft 332 of a securing member 130. To hold the
first duct connector 101 securely in the duct board opening 105,
the securing members 130 pull the tab members 338 against the duct
board 103, thereby compressing the flange sealing member 122
between the flange 120 and the duct board 103, forming an air-tight
seal between the duct connector 101 and the duct board 103.
[0082] A securing force is the total force exerted by all tab
members 338 on the duct board 103. An opposite and equivalent
sealing force is exerted by the flange sealing member 122 on the
duct board 103 when the tab members 338 are moved into their
deployed position. A securing pressure is the force per unit area
exerted by the tab members 338 on the duct board 103. A sealing
pressure is the force per unit area exerted by the flange sealing
member 122 on the duct board 103. Though the sealing and securing
forces are equivalent, the sealing and securing pressures will
differ based on the differences in surface area of the flange
sealing member 122 and tab members 338. In one exemplary
embodiment, the total area of the flange sealing members 338
(however many are included) is at least 10%, 20%, 30%, 40%, or 50%
of the area of the opening 105 in the duct board 103. The flange
sealing member 338 surface area is smaller, however, to provide
enough sealing pressure between the flange sealing member 122 and
the duct board 103 to prevent air leaks.
[0083] As noted above, each tab member 338 comprises a base 331 and
a paddle 333. The base 331 movably attaches the paddle 333 to the
shaft 330 of a securing member 130 with a threaded connection,
though any kind of movable connection may be used. The paddle 333
operates to distribute the securing force over a larger surface
area to reduce the securing pressure and thereby prevent crushing
the duct board, which would be detrimental to the insulating
ability of the duct board 103. Tab and securing members are
distributed around the periphery of the duct connector central tube
to provide an evenly distributed sealing force. Though the tab and
securing members are shown as separate components, they may also be
formed of a single component. Any number of tabs and securing
members can be included.
[0084] In another exemplary embodiment, illustrated in FIGS. 3B,
3C, and 3D, a single-piece duct connector 301 is shown inserted
into the opening 105 in the piece of duct board 103. The
single-piece duct connector 301 incorporates the features of the
first and second connectors 101, 102 in a single connector
component. For example, the single-piece duct connector 301
assembles to the duct board 103 like the first connector 101, and
to the flexible duct 103 like the second connector 102. Combining
the first and second connectors 101, 102 into a single connector
eliminates the need for or combines elements of the two separate
connectors. For example, the single-piece connector 301 has only
one flange 120 that combines the functions of the flange 120 of the
first connector 101 and the flange 160 of the second connector 102.
As another example, the mating portions 140, 180 and connection
sealing member 162 are unnecessary in the single-piece connector
301. The single-piece connector 301 can be assembled first to the
duct board 103 and then to the flexible duct 104.
[0085] FIGS. 4-7 illustrate the installation of an exemplary first
duct connector 101 into an opening 105 in a piece of duct board
103. In the illustrated embodiment, the first duct connector with
tab members in their undeployed position is inserted into an
opening in a piece of duct board. The tab members are then moved
into their deployed position by turning the securing members. Once
the tab members have been rotated into their deployed position,
further rotation of the securing members pulls the tab members
toward the flange of the first duct connector, thereby coming into
contact with the duct board. Further turning of the securing
members applies pressure to the duct board between the tab members
and the sealing member, forming a seal between the flange sealing
member, the first duct connector, and the duct board.
[0086] Referring now to FIG. 4, the first duct connector 101 is
shown with its tab members 338 in the undeployed position. As can
be seen in FIG. 4, the shafts 330 of the securing members 130
extend along the outer surface 116 of the central tube 110 and are
movably held within a plurality of channels 335 in the outer
surface 116 of the central tube 110. The channels 335 hold the
securing members 130 in position during installation of the first
duct connector 101 in the duct board 103. In the undeployed
position, the tab members 338 are positioned such that they do not
interfere with the opening 105 in the duct board 103 during
installation of the connector 101. The opening 105 in the duct
board 103 is larger than the central tube 110, but not larger than
the opening 123 in the flange sealing member 122.
[0087] FIG. 5 shows the first duct connector 101 inserted into the
opening 105 in the duct board 103 until the flange sealing member
122 abuts the duct board 103. At this point the tab members 338 are
still in their undeployed position. When the duct connector 101 is
fully inserted in the duct board 103 the securing members 130 can
be rotated to deploy the tab members 338. In FIG. 6 one of the tab
members 338 can be seen in a partially deployed state. The paddle
333 of the partially deployed tab member 338 is shown protruding
beyond the central tube 110. Though Further rotation of the
securing members 130 moves the paddle portion 333 of each tab
member 338 to its fully deployed position, as shown in FIG. 7.
During the transition from the undeployed to deployed state, the
tab members 338 first rotate until the base 331 of the tab member
338 aligns with the channel 335 holding the shaft 330. Once the
base portion 331 aligns with the channel 335, the tab member 338 is
pulled toward the duct board 103 by further rotation of the
securing member 130 because of the threaded connection between the
shaft 330 and the base portion 331 of the tab member 338. When the
paddle 333 of the tab member 338 has engaged the duct board 103,
further rotation of the securing members 130 increases the securing
force exerted by the tab members, thereby increasing the securing
and sealing pressures, creating an air tight seal between the duct
board and the first duct connector.
[0088] FIGS. 8-10A illustrate the steps to assemble a segment of
flexible duct 104 to an exemplary second duct connector 102. A
typical flexible duct is made of three layers of material: a
reinforced core, an insulation layer, and an outer sheath. To
create an air tight seal and well insulated connection, the layers
are separately assembled to the connector, starting with the
innermost layer.
[0089] The reinforced core of the flexible duct is the first layer
of the duct to be assembled to the second duct connector. FIGS. 8
and 8A illustrate a wire reinforced core 800 of a segment of
flexible duct assembled to a central tube 150 of the second duct
connector 102. A tapered portion 153 of the end of the central tube
150 of the connector 102 allows the reinforced core 800 of the
flexible duct 104 to slide over the central tube 150. The
reinforced core 800 is secured to the central tube 150 by a tie
fastener 802 positioned on the connector side of an annular ridge
151 on the exterior 156 of the central tube 150. After the
reinforced core 800 is secured to the second duct connector 102,
the insulation layer can be assembled to the connector 102 as shown
in FIGS. 9 and 9A. An insulation layer 900 is inserted into the
radial gap 165 between the collar 170 and the central tube 150. The
insulation layer 900 is partially compressed when it is inserted
into the gap 165 and is held in place by the friction caused by the
insulation expanding against the connector 102.
[0090] Finally, the outer sheath 106 of the flexible duct 104 is
attached to the connector 102, as shown in FIGS. 10 and 10A. The
outer sheath 106 overlaps the collar 170 and is secured to the duct
connector 102 with a tie fastener 107 positioned past an annular
ridge 171 on the collar 170, similar to how the reinforced core 800
is attached to the central tube 150. The outer sheath 106 protects
the insulation 900 and reinforced core 800 of the flexible duct
104. In some embodiments, the outer sheath 106 may be formed of a
material that allows it to reflect heat from the surrounding
environment, thereby providing additional insulation. In some
embodiments the outer sheath 106 may be formed of a material that
serves as a vapor barrier, preventing moisture from penetrating the
flexible duct. Though the fasteners 802, 1002 used to secure the
reinforced core 800 and outer sheath 106 to the second duct
connector 102 are shown as tie fasteners, any connection means may
be used to secure the flexible duct to the second duct connector,
such as, for example, a threaded collar, a compression connection,
a fastener connection, an adhesive connection, a clamp connection,
or the like.
[0091] In the embodiment illustrated in FIG. 8B, the second duct
connector 102 does not include a collar 170. In the embodiment of
FIG. 8B, the insulation layer 900 and the outer sheath 106 of the
flexible duct 104 may be secured to the second duct connector 102
by any means, such as, for example, adhesive, shrink wrap, pipe
clamps, tie wraps, or the like.
[0092] As shown in FIG. 11, the second duct connector 102 may
optionally include a damper 1100 disposed in the interior 155 of
the central tube 150 of the second duct connector 102 that is
controlled by a damper control lever 1104 on the exterior of the
second duct connector 102. A control rod 1102 connects the control
lever 1104 to the damper 1100, allowing the damper 1100 to be
actuated by movement of the lever 1104. The control rod 1102 passes
through openings 1108, 1110 in the collar 170 and central tube 150
respectively, such that the control rod does not interfere with the
outer sheath 106, insulation 900, or reinforced core 800 of the
flexible duct 104 assembled to the connector 102. The damper may be
manually actuated or be actuated with an actuator which may be any
kind of actuator, such as, for example, an electric actuator, a
pneumatic actuator, a mechanical actuator, or the like. In some
embodiments, a weight may be attached to the lever so that the
damper acts as a relief valve that opens when the air pressure in
the duct reaches a predetermined pressure. The duct connector may
also include a sensor for monitoring the conditions of the air
inside of the duct connector, such as a temperature sensor,
humidity sensor, or any other kind of sensor. Said sensor may be
inserted through the collar and central tube of the connector,
similar to a control rod for a damper.
[0093] FIGS. 12-18 illustrate an exemplary embodiment of a duct
connection system for connecting flexible ducts to rigid ducts and
plenums in a residential building HVAC system. The illustrated
single piece duct connector 1200 is generally annular in shape,
though it may be any shape appropriate for connection to flexible
ducts. The duct connection system illustrated by FIGS. 12-18
comprises a single piece connector 1200 that can be assembled
on-site. The single piece connector 1200 is inserted and anchored
in an opening 1201 in a piece of duct board 1202 and is then
assembled to a segment of flexible duct (not shown).
[0094] FIG. 12 is a cross-sectional view of an exemplary
single-piece flexible duct connector 1200 inserted into an opening
1201 in a piece of duct board 1202. The connector 1200 has an
insert 1210, a flange 1220, a central tube 1230 within the insert
1220, and multiple anchor members 1240. The insert 1210 of the duct
connector 1200 is insertable into the opening 1201 in the duct
board 1202 and has a first end 1212, a second end 1214, an outer
surface 1216, and an inner surface 1218. The central tube 1230 is
movable between an initial position and a locked position, and has
a first end 1232, a second end 1234, an outer surface 1236, and an
inner surface 1238. Air flows through the connector 1200 through
the interior 1235 of the central tube 1230. Each anchor member 1240
has a bearing portion 1242 and a brace portion 1244 that are
hingeably connected to each other. Each bearing portion 1242 is
hingeably connected to the first end 1212 of the insert 1210, and
each brace portion 1244 is hingeably connected to the first end
1232 of the central tube 1230.
[0095] The flange 1220 is rigidly connected to the second end 1214
of the insert 1210 and includes a front surface 1224 facing the
duct board 1202 and a back surface 1226 facing away from the duct
board 1202. A collar 1250 extends from the back surface 1226 of the
flange 1220 and has an outer surface 1226 and an inner surface
1224. A flange sealing member 1222 disposed between the front face
1224 of the flange 1220 and the duct board 1202 creates an
air-tight seal between the duct board 1202 and the duct connector
1200. The flange sealing member 1222 may be attached to the duct
board 1202, the connector 1200, or both, by any connecting means,
such as, for example, an adhesive connection, a threaded
connection, a fastener connection, or the like. The flange sealing
member 1222 may also be compressed between the flange and the duct
board to hold it in position.
[0096] The duct connector 1200 shown in FIG. 12 is in an unexpanded
condition. Moving the central tube 1230 into the locked position
transitions the duct connector 1200 into an expanded condition,
shown in FIG. 13. The central tube 1230 held in the locked position
by a locking ridge 1231 on its outer surface 1236 that engages one
of the multiple corresponding locking ridges 1211 on the inner
surface 1218 of the insert 1210.
[0097] FIGS. 14-18 illustrate the installation of an exemplary
single-piece duct connector 1200 into a piece of duct board 1202.
FIG. 14 is an exploded view of the duct connector 1200, flange
sealing member 1222, duct board 1202, and an optional anchor pad
1246. FIG. 15 shows the unexpanded duct connector 1200 inserted
into the duct board 1202 with the central tube 1230 in its initial
position. The anchor members 1240 and the first end 1232 of the
central tube 1230 can be seen in FIG. 16. In FIG. 17, the central
tube 1230 has been pulled back to its locked position and is now
ready for assembly to a flexible duct. FIG. 18 illustrates the
expanded condition of the duct connector.
[0098] When the central tube 1230 is in its initial position, shown
in FIGS. 12, 14, 15, and 16, the anchor members 1240 are generally
unbent, allowing the duct connector 1200 to be inserted into the
opening 1201 in the duct board 1202, as shown in FIGS. 15 and 16.
After the duct connector 1200 is inserted into the duct board 1202,
the insert 1210 and flange 1220 are held against the duct board
1202 as the central tube 1230 is pulled back to secure the
connector 1200 in the duct board opening 1201, as shown in FIG. 17.
As the axial distance between the first end 1212 of the insert 1210
and the first end 1232 of the central tube 1230 is reduced, the
anchor members 1240 bend outwards from the central tube 1230. The
anchor members 1230 continue to bend until the bearing portions
1242 of the anchor members 1240 are pressed firmly against the duct
board 1202 by the brace portions 1244 of each anchor member 1240,
as shown in FIGS. 13 and 18. The central tube 1230 is held in its
locked position by locking ridges 1211, 1231. As can be seen in
FIGS. 12 and 13, the insert 1210 may include multiple locking
ridges 1211 to provide a range of positions of the central tube
1230. Different locked positions of the central tube provide
control over the amount of force exerted on the duct board and
adjustment based on the thickness of the duct board.
[0099] When the single-piece duct connector 1200 is in the expanded
condition, as shown in FIG. 17, a segment of flexible duct (not
shown) can be assembled to the connector as described above and
illustrated by FIGS. 8-10. Once the flexible duct is assembled to
the connector, a fastener (not shown) and an annular ridge 1253
located on the outer surface 1256 of the collar 1250 prevent the
outer sheath (not shown) of a flexible duct from sliding off the
collar after installation. A similar annular ridge 1233 and
fastener (not shown) on the outer surface of the central tube
secure the reinforced core of a flexible duct to the connector. An
insulation layer (not shown) of a flexible duct is received in a
radial gap 1225 between the inner surface 1258 of the collar 1250
and the outer surface 1236 of the central tube 1230.
[0100] FIGS. 19-21 illustrate an exemplary embodiment of a duct
connection system 1900 for connecting flexible ducts to rigid ducts
and plenums in a residential building HVAC system. The duct
connection system 1900 is similar to the two-piece duct connection
system 100 illustrated in FIGS. 1-11. The duct connection system
1900 includes of a first connector 1901 connected to duct board
1904, and a second connector 1902 connected to a flexible duct (not
shown). Like connection system 100, either connector 1901, 1902 can
be a male or female connector.
[0101] Referring now to FIG. 19, the first connector 1901 is
inserted into an opening 1903 in the duct board 1904. The first
connector 1901 attaches to the duct board 1904 using anchor members
1940 like the duct connector 1200 illustrated in FIGS. 12-18. FIG.
19 illustrates the central tube 1930 of the connector 1901 in an
initial position, and FIG. 20 shows the central tube 1930 in a
locked position, held in place by locking ridges 1911, 1931 on the
insert 1910 and central tube 1930, respectively.
[0102] Referring now to FIG. 21, the second connector 1902 is
shown. Each connector 1901, 1902 has a mating portion 1950, 1990
that allows the connectors to be joined. Like the connection system
100, mating portions 1950, 1990 include locking ridges 1952, 1992
that securing the mating portions together. The second connector
1902 is configured to be attached to a flexible duct (not shown)
with annular ridges 1983, 1963 for securing an outer sheath (not
shown) and reinforced core (not shown). This embodiment of the duct
connection system combines the features of the previous two
embodiments. The duct connection system 1900 gives the installer
the option of assembling the flexible duct to one connector,
leaving only the duct board connector to be installed while in the
attic or another tight space within a residential structure.
[0103] FIGS. 22-34 illustrate an exemplary embodiment of a duct
connection system 2200 for connecting flexible ducts to rigid duct
members, such as duct boards 2203 and duct outlet boots 2230, of a
residential building HVAC system. The duct connection system 2200
includes a duct board connector 2210 inserted in an opening 2201 in
a duct board 2203, a first duct connector 2220 connected to a first
end of a flexible duct 2202, a second duct connector 2221 connected
to a second end of the flexible duct 2202, and a duct boot 2231
connector of a duct boot 2230 connected to a wall or other surface
2204 of a room.
[0104] Referring now to FIG. 22, a duct connection system 2200 is
shown connecting a flexible duct 2202 between a duct board 2203 and
a wall of a room 2204. The connectors 2210, 2220, 2221, and 2231 of
the duct connection system shown in FIG. 22 are the same as or
similar to first and second connectors 101, 102 of the two-piece
duct connection system 100 illustrated in FIGS. 1-11. The duct
board connector 2210 and first duct connector 2220 form an
air-tight connection between the duct board 2203 and the flexible
duct 2202. The second duct connector 2221 and the duct boot
connector 2231 form an air-tight connection between the flexible
duct 2202 and the duct boot 2230. The duct board connector 2210 is
inserted through an opening 2201 in the duct board 2203 like the
first connector 101 shown in FIG. 1, and the first and second duct
connectors 2220, 2221 attach to the flexible duct 2202 like the
second duct connector 102 shown in FIG. 1. Air flows into the duct
connection system 2200 through an inlet flow path 2240, a duct
inlet flow path 2242, a duct outlet flow path 2244, and an outlet
flow path 2246.
[0105] The duct connector 2231 is integrated with an inlet portion
2232 of the duct boot 2230 and connects the duct boot 2230 to the
flexible duct 2202. An outlet portion 2234 of the duct boot 2230 is
configured to interface with an opening 2205 in the wall 2204. The
outlet 2234 may be rectangular, circular, elliptical, or any shape
that corresponds with the shape of the opening 2205. The duct boot
outlet 2234 includes a flange 2236 and a flange sealing member 2238
for creating a seal with the wall 2204.
[0106] FIGS. 23-27 illustrate exemplary embodiments of duct
adapters that allow standard sheet metal duct boots that do not
include a duct connector 2231 to be used in the duct connection
system 2200. The outlet portions 2234 of the duct boots shown in
FIGS. 23-27 are rectangular, but can take on any shape, such as,
for example, a circle, an oval, a square, or the like to match the
shape of an opening in a wall.
[0107] Referring now to FIGS. 23, 23A, and 23B, an exemplary duct
adapter 2300 is shown. The duct adapter 2300 includes a duct
connector 2231 for connecting with the duct connector 2221, and a
connection portion 2302. The duct connector 2231 may have the same
or similar features as the duct connector 101 for connecting to a
duct connector 102, 2220, and 2221. A gasket 2304 on the interior
surface of the connection portion 2302 forms a low air leakage seal
with the exterior surface of the inlet portion 2232 of the duct
boot 2230 that can be sealed with a sealant, such as, for example,
tape, caulk, mastic, or the like. The gasket 2304 is formed of a
series of ribs or ridges. The ribs of the gasket 2304 grip onto the
exterior surface of the inlet portion 2232 to connect the flexible
duct 2202 to the duct boot 2230. The multiple ribs form multiple
sealing points with the inlet portion 2232. The gasket 2304 is
formed of a pliable and durable material, such as, for example,
EPDM rubber or a similar elastomeric material. In some embodiments,
as shown in FIG. 23A, the ribs form a serrated profile that
increases the force required to remove the adapter 2300 from the
duct boot 2230 relative to the force required to insert the inlet
portion 2232 into the adapter 2300. In some embodiments, as shown
in FIG. 23B, the diameter of the ridges of the gasket 2304
decreases from one ridge to the next to accommodate variations,
imperfections, and damage in the diameter of the inlet portion
2232.
[0108] Referring now to FIG. 24, an exemplary duct adapter 2400 is
shown. The duct adapter 2400 includes a duct connector 2231 for
connecting with the duct connector 2221, and a connection portion
2402. The duct connector 2231 may have the same or similar features
as the duct connector 101 for connecting to a duct connector 102,
2220, and 2221. A gasket 2404 on the exterior surface of the
connection portion 2402 forms a low air leakage seal with the
interior surface of the inlet portion 2232 of the duct boot 2230
that can be sealed with a sealant, such as, for example, tape,
caulk, mastic, or the like. The gasket 2404 is formed of a series
of ribs or ridges. The ribs of the gasket 2404 grip onto the
exterior surface of the inlet portion 2232 to connect the flexible
duct 2202 to the duct boot 2230. The multiple ribs form multiple
sealing points with the inlet portion 2232. The gasket 2404 is
formed of a pliable and durable material, such as, for example,
EPDM rubber or a similar elastomeric material. In some embodiments,
the ribs form a serrated profile that increases the force required
to remove the adapter 2400 from the duct boot 2230 relative to the
force required to insert the inlet portion 2232 into the adapter
2400, like the gasket 2304 shown in FIG. 23A. In some embodiments,
the diameter of the ridges of the gasket 2404 decreases from one
ridge to the next to accommodate variations, imperfections, and
damage in the diameter of the inlet portion 2232, like the gasket
2304 shown in FIG. 23B.
[0109] Referring now to FIG. 25, an exemplary duct adapter 2500 is
shown. The duct adapter 2500 includes a duct connector 2231 for
connecting with the duct connector 2221, and a connection portion
2502. A rubber boot 2504 with pipe clamps 2506 at each end joins
the connection portion 2502 of the adapter 2500 and the inlet
portion 2232 of the duct boot 2230 in a butt joint arrangement. The
pipe clamps 2506 are tightened to form a seal with the adapter 2500
and the inlet portion 2232 of the duct boot 2230.
[0110] Referring now to FIG. 26, an exemplary duct adapter 2600 is
shown. The duct adapter 2600 includes a duct connector 2231 for
connecting with the duct connector 2221, and a connection portion
2602. In one exemplary embodiment, a wide rubber zip tie 2604
secures the connection portion 2602 of the adapter 2600 and the
inlet portion 2232 of the duct boot 2230 in a butt joint
arrangement. The zip tie 2604 may be from about 0.5 inches wide to
about 2 inches wide to cover the joint between the adapter 2600 and
the inlet portion 2232 of the duct boot 2230, forming an air-tight
seal with each. In another exemplary embodiment, the connection
portion 2602 of the adapter 2600 is made from a flexible material
and fits over the inlet portion 2232 of the duct boot 2230. In this
exemplary embodiment, a conventional zip tie 2604 secures the
connection portion 2602 of the adapter 2600 over the inlet portion
2232 of the duct boot 2230.
[0111] Referring now to FIGS. 27, 27A, 27B, and 27C, an exemplary
duct adapter 2700 is shown. The duct adapter 2700 includes a duct
connector 2231 for connecting with the duct connector 2221, and a
connection portion 2702. The connection portion 2702 includes an
annular groove 2704 for receiving the inlet portion 2232 of the
duct boot 2230. In some embodiments, as shown in FIG. 27A, a foam
portion 2710 is disposed within the groove 2704 for forming a seal
with the inlet portion 2232. In some embodiments, as shown in FIG.
27B, a plurality of rubber ribs 2720 are disposed within the groove
2704 for forming a seal with the inlet portion 2232. In some
embodiments, the ribs 2720 are serrated like those shown in FIG.
23A. In some embodiments, as shown in FIG. 27C, the groove 2704 is
filled with a sealant 2730 for forming a seal with the inlet
portion 2232. The sealant 2730 may be any suitable sealant that
adheres to the groove 2704 and the inlet portion 2232, such as, for
example, caulk, mastic, or the like. Any of the embodiments shown
in FIGS. 27A, 27B, and 27C may also include a fastener 2706 to
secure the inlet portion 2232 within the groove 2704.
[0112] Referring now to FIGS. 28, and 28A, an exemplary duct
connection system 2200 is shown. The duct connection system 2200
includes a duct boot 2230 that makes a right-angle connection
between the flexible duct 2202 and the wall 2204. A securing ring
2800 is inserted through the opening 2205 in the wall 2204 to
secure the outlet portion 2234 to the wall 2204. The securing ring
2800 has a flange 2802, a mating portion 2804, and a sealing member
2806. The sealing member 2806 forms a seal between the wall 2204
and the flange 2802. The mating portion 2804 is inserted into and
attaches to the outlet portion 2234 of the duct boot 2230 so that
the duct boot 2230 is pulled against the wall 2204 by the securing
ring 2800, forming an air-tight seal with the outlet portion 2234
of the duct boot 2230. The securing ring 2800 is shown in an
unassembled condition in FIG. 28, and an assembled condition in
FIG. 28A.
[0113] Referring now to FIGS. 29, 29A, 29B, and 29C, an exemplary
duct connection system 2200 is shown. The duct connection system
2200 includes a duct boot 2230 that makes a straight connection
between the flexible duct 2202 and the wall 2204. A securing ring
2800 is inserted through the opening 2205 in the wall 2204 to
secure the outlet portion 2234 to the wall 2204. The securing ring
2800 has a flange 2802, a mating portion 2804, and a sealing member
2806. The sealing member 2806 forms a seal between the wall 2204
and the flange 2802. The mating portion 2804 is inserted into and
attaches to the outlet portion 2234 of the duct boot 2230 so that
the duct boot 2230 is pulled against the wall 2204 by the securing
ring 2800, forming an air-tight seal with the outlet portion 2234
of the duct boot 2230. In some embodiments, as shown in FIG. 29B,
the duct boot 2232 does not include a flange sealing member 2238
and the sealing member 2806 forms the only seal with the wall 2204.
In some embodiments, as shown in FIG. 29C, the securing ring 2800
does not include the sealing member 2806, and the flange sealing
member 2238 forms the only seal with the wall 2204. The securing
ring 2800 is shown in an unassembled condition in FIG. 29, and an
assembled condition in FIGS. 29A, 29B, and 29C.
[0114] Referring now to FIGS. 30, and 30A, an exemplary duct
connection system 2200 is shown. The duct connection system 2200
further includes a cover 3000 that includes a groove 3002 and a
plurality of securing members 3004. The cover grate 3000 is shown
in an unassembled condition in FIG. 30, and an assembled condition
in FIG. 30A. The cover grate 3000 is configured to attach to the
securing ring 2800 to provide improved aesthetics, protection from
foreign objects entering the duct system 2200, and in some
embodiments, directional vanes to direct the flow direction of air
leaving the duct system 2200. The groove 3002 is configured to
receive the flange 2802 of the securing ring 2800. The securing
members 2804 snap around the flange 2802 and hold the cover 3000 to
the securing ring 2800. In some embodiments, the securing members
2804 form a continuous ring around the perimeter of the cover grate
3000. While the cover grate 3000 is shown attached to a straight
duct boot 2230, the cover grate 3000 may be used on any duct boot
2230 described above.
[0115] Referring now to FIG. 31, an exemplary duct boot 2230 and
securing ring 2800 are shown. The securing ring 2800 is inserted
through the opening 2205 in the wall 2204 to secure the outlet
portion 2234 to the wall 2204. The securing ring 2800 has a flange
2802 and a mating portion 2804. Fasteners 3102 are inserted through
the securing ring 2800 and into threaded portions 3104 disposed
inside the outlet portion 2234 of the duct boot 2230. Tightening
the fasteners 3102 pulls the flange portion 2236 toward the wall
2204, compressing the sealing member 2238 between the flange
portion 2236 and the wall 2204 and forming a seal. Any kind of
fastener may be used in place of the fasteners 3102 and threaded
portions 3104, such as, for example, screws, bolts, brads, rivets,
snaps, quarter-turn fasteners, or the like.
[0116] Referring now to FIGS. 32, and 32A, an exemplary duct boot
retention system is shown. The retention system includes a bracket
3200 secured between wall studs 3204. A biasing member 3202
attaches to both the bracket 3200 and the duct boot 2232. The
biasing member 3202 biases the duct boot 2232 toward the wall board
2204 to compress the sealing member 2238 against the wall board
2204, thereby forming a seal. An installer installs the bracket
3200 between the studs 3204 and then attaches the duct boot 2232 to
the biasing member 3202. The wall board 2204 is pressed by the
installer against the duct boot sealing member 2238 with an
installation force 3210. The wall board 2204 is then secured by the
installer to the studs 3204 with fasteners 3206. The retention
system illustrated by FIGS. 32 and 32A, accommodate any shape duct
boot.
[0117] Referring now to FIGS. 33, and 33A, an exemplary retention
bracket 3300 is shown. Fasteners 3302 attach the brackets 3300 to
threaded portions 3304 disposed inside the outlet portion 2234 of
the duct boot 2230. Tightening the fasteners 3302 pulls the flange
portion 2236 of the duct boot 2230 toward the wall 2204,
compressing the sealing member 2238 between the flange portion 2236
and the wall 2204 and forming a seal. Any kind of fastener may be
used in place of the fasteners 3302 and threaded portions 3304,
such as, for example, screws, bolts, brads, rivets, snaps,
quarter-turn fasteners, or the like. The retention brackets
illustrated by FIGS. 33 and 33A, accommodate any shape duct
boot.
[0118] While various inventive aspects, concepts and features of
the disclosures may be described and illustrated herein as embodied
in combination in the exemplary embodiments, these various aspects,
concepts and features may be used in many alternative embodiments,
either individually or in various combinations and sub-combinations
thereof. Unless expressly excluded herein all such combinations and
sub-combinations are intended to be within the scope of the present
application. Still further, while various alternative embodiments
as to the various aspects, concepts and features of the
disclosures--such as alternative materials, structures,
configurations, methods, devices and components, alternatives as to
form, fit and function, and so on--may be described herein, such
descriptions are not intended to be a complete or exhaustive list
of available alternative embodiments, whether presently known or
later developed. Those skilled in the art may readily adopt one or
more of the inventive aspects, concepts or features into additional
embodiments and uses within the scope of the present application
even if such embodiments are not expressly disclosed herein.
Additionally, even though some features, concepts or aspects of the
disclosures may be described herein as being a preferred
arrangement or method, such description is not intended to suggest
that such feature is required or necessary unless expressly so
stated. Still further, exemplary or representative values and
ranges may be included to assist in understanding the present
application, however, such values and ranges are not to be
construed in a limiting sense and are intended to be critical
values or ranges only if so expressly stated. Moreover, while
various aspects, features and concepts may be expressly identified
herein as being inventive or forming part of an disclosure, such
identification is not intended to be exclusive, but rather there
may be inventive aspects, concepts and features that are fully
described herein without being expressly identified as such or as
part of a specific disclosure, the disclosures instead being set
forth in the appended claims. Descriptions of exemplary methods or
processes are not limited to inclusion of all steps as being
required in all cases, nor is the order that the steps are
presented to be construed as required or necessary unless expressly
so stated. The words used in the claims have their full ordinary
meanings and are not limited in any way by the description of the
embodiments in the specification.
[0119] As described herein, when one or more components are
described as being connected, joined, affixed, coupled, attached,
or otherwise interconnected, such interconnection may be direct as
between the components or may be in direct such as through the use
of one or more intermediary components. Also as described herein,
reference to a "member," "component," or "portion" shall not be
limited to a single structural member, component, or element but
can include an assembly of components, members or elements. Also as
described herein, the terms "substantially" and "about" are defined
as at least close to (and includes) a given value or state
(preferably within 10% of, more preferably within 1% of, and most
preferably within 0.1% of).
* * * * *