U.S. patent application number 12/261074 was filed with the patent office on 2009-05-14 for sealing system for a heat exchanger assembly.
This patent application is currently assigned to DELPHI TECHNOLOGIES, INC.. Invention is credited to Brian J. Coyle, Frank J. Leitch, Scott B. Lipa.
Application Number | 20090120610 12/261074 |
Document ID | / |
Family ID | 40328540 |
Filed Date | 2009-05-14 |
United States Patent
Application |
20090120610 |
Kind Code |
A1 |
Coyle; Brian J. ; et
al. |
May 14, 2009 |
SEALING SYSTEM FOR A HEAT EXCHANGER ASSEMBLY
Abstract
A sealing system for sealing a heat exchanger assembly to an
HVAC module. A plurality of male connecting members is disposed on
one of the outer periphery of the heat exchanger and the interior
surface of the channel of the HVAC module. A plurality of female
connecting members is disposed on the other of the outer periphery
of the heat exchanger and the interior surface of the channel of
the HVAC module. The male connecting members engage the female
connecting members to support the heat exchanger and to seal the
heat exchanger to the HVAC module to restrict the flow of air from
circumventing the heat exchanger. The male and female connecting
members are tuned to give the heat exchanger a natural frequency in
the range of 20 and 100 Hz for dampening vibrations between the
heat exchanger and the HVAC module.
Inventors: |
Coyle; Brian J.; (Orchard
Park, NY) ; Leitch; Frank J.; (North Tonawanda,
NY) ; Lipa; Scott B.; (Snyder, NY) |
Correspondence
Address: |
DELPHI TECHNOLOGIES, INC.
M/C 480-410-202, PO BOX 5052
TROY
MI
48007
US
|
Assignee: |
DELPHI TECHNOLOGIES, INC.
Troy
MI
|
Family ID: |
40328540 |
Appl. No.: |
12/261074 |
Filed: |
October 30, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61002315 |
Nov 8, 2007 |
|
|
|
Current U.S.
Class: |
165/67 |
Current CPC
Class: |
F28D 2021/0085 20130101;
F28F 9/002 20130101; F28F 2265/30 20130101; F28D 2021/0084
20130101; B60H 2001/00635 20130101; F28F 17/005 20130101; B60H
1/00521 20130101; B60H 1/00321 20130101 |
Class at
Publication: |
165/67 |
International
Class: |
F28F 9/00 20060101
F28F009/00 |
Claims
1. A sealing system for a heat exchanger assembly in an HVAC module
comprising: an HVAC module having an interior surface defining a
channel for air to flow therethrough; a heat exchanger having an
outer periphery disposed in said channel of said HVAC module; one
of said outer periphery of said heat exchanger and said interior
surface of said channel of said HVAC module defining a connector
extending toward the other of said outer periphery of said heat
exchanger and said interior surface of said channel of said HVAC
module for supporting said heat exchanger in said channel of said
HVAC module and for sealing said heat exchanger to said channel of
said HVAC module to restrict the flow of air from circumventing
said heat exchanger; and said connector being tuned to give said
heat exchanger a natural frequency in the range of 20 and 100 Hz
for dampening vibrations between said heat exchanger and said HVAC
module.
2. The assembly as set forth in claim 1 wherein at least one of
said male and female connecting members defines a lip for catching
a condensate from said heat exchanger.
3. The assembly as set forth in claim 1 wherein said connector is
tuned to give said heat exchanger a natural frequency in the range
of 45 and 70 Hz for dampening vibrations between said heat
exchanger and said HVAC module.
4. The assembly as set forth in claim 3 wherein said connector is
tuned to give said heat exchanger a natural frequency in the range
of 65 and 70 Hz for dampening vibrations between said heat
exchanger and said HVAC module.
5. The assembly as set forth in claim 1 wherein said connector is
of a resilient material.
6. The assembly as set forth in claim 5 wherein said resilient
material of said connector is rubber.
7. The assembly as set forth in claim 1 wherein said connector
includes a male connecting member disposed on one of the outer
periphery of said heat exchanger.
8. The assembly as set forth in claim 7 wherein said connector
includes a female connecting member disposed on the other of said
outer periphery of said heat exchanger and said channel of said
HVAC module and engaging said male connecting member for supporting
said heat exchanger in said channel of said HVAC module.
9. The assembly as set forth in claim 8 further comprising a
plurality of male connecting members.
10. The assembly as set forth in claim 9 further comprising a
plurality of female connecting members.
11. The assembly as set forth in claim 10 wherein the one of said
male and female connecting members disposed on said heat exchanger
extends along the entirety of said outer periphery for sealing said
heat exchanger to said channel of said HVAC module to restrict the
flow of air from circumventing said heat exchanger.
12. The assembly as set forth in claim 10 wherein each of said male
connecting members is disposed on said outer periphery of said heat
exchanger and each of said female connecting members is disposed on
said interior surface of said HVAC module.
13. The assembly as set forth in claim 12 wherein each of said
female connecting members includes an isolating member being of a
resilient material for receiving and damping vibrations between
said heat exchanger and said HVAC module.
14. The assembly as set forth in claim 13 wherein said isolating
member has a tubular shape.
15. The assembly as set forth in claim 14 wherein each of said
female connecting members further includes a pair of fingers
extending outwardly from said isolating member in spaced and
parallel relationship to one another to present a groove
therebetween.
16. The assembly as set forth in claim 15 wherein each of said male
connecting members is a flange extending outwardly from said outer
periphery of said heat exchanger to engage said groove of one of
said female connecting members.
17. The assembly as set forth in claim 12 wherein each of said
female connecting members is a hinge presenting two legs rotatably
connected by a pivot point with one of said legs engaging said
interior surface of said HVAC module.
18. The assembly as set forth in claim 17 wherein each of said
hinges includes an isolating web extending between said legs for
dampening vibrations between said heat exchanger and said HVAC
module.
19. The assembly as set forth in claim 18 wherein one of said legs
presents a pair of fingers extending in spaced and parallel
relationship to present a groove therebetween.
20. The assembly as set forth in claim 19 wherein each of said male
connecting members is a flange extending outwardly from said outer
periphery of said heat exchanger to engage said groove of said
female connecting member.
21. The assembly as set forth in claim 12 wherein each of said
female connecting members is a flexible seal member being of a
resilient material and extending to a distal end from said interior
surface of said HVAC module toward said heat exchanger.
22. The assembly as set forth in claim 21 wherein each of said
flexible seal members defines a pair of fingers extending outwardly
from said distal end in spaced and parallel relationship to one
another to define a groove therebetween.
23. The assembly as set forth in claim 22 wherein each of said male
connecting members is a flange extending outwardly from said outer
periphery of said heat exchanger to engage said groove of said
flexible seal member of said female connecting member.
24. The assembly as set forth in claim 23 further including a
plurality of seals extending from said fingers of each of said
female connecting members into said groove to engage said flange of
said male connecting member.
25. The assembly as set forth in claim 10 wherein each of said male
connecting members is a flange disposed on said interior surface of
said channel of said HVAC module and extends toward said heat
exchanger and said outer periphery of said heat exchanger presents
a groove to define said female connecting member for engaging said
flange.
26. The assembly as set forth in claim 1 wherein said inner
periphery of said interior surface of said HVAC module has a
rectangular shape.
27. The assembly as set forth in claim 1 wherein said heat
exchanger includes a first manifold and a second manifold extending
in spaced and parallel relationship to one another.
28. The assembly as set forth in claim 27 wherein each of said
first and second manifolds defines an outer manifold surface with
said outer manifold surfaces facing opposite to one another to
define said heat exchanger height being the distance between said
outer manifold surfaces.
29. The assembly as set forth in claim 27 wherein each of said
first and second manifolds defines an inner manifold surface with
said inner manifold surfaces facing towards one another.
30. The assembly as set forth in claim 29 wherein said heat
exchanger further includes a plurality of tubes extending in spaced
and parallel relationship to one another transversely between said
inner manifold surfaces of said first and second manifolds for
establishing fluid communication between said first and second
manifolds.
31. The assembly as set forth in claim 30 wherein each of said
tubes has a cross-section presenting flat sides interconnected by a
round front and a round back.
32. The assembly as set forth in claim 31 wherein said plurality of
tubes includes a first tube disposed on one side of said heat
exchanger and having a first outer tube surface and a last tube
disposed on the other side of said heat exchanger and having a last
outer tube surface.
33. The assembly as set forth in claim 30 further including a
plurality of air fins disposed between adjacent ones of said tubes
for transferring heat from said tubes to the flow of air.
34. The assembly as set forth in claim 1 wherein said channel of
said HVAC module has a module width and a module height.
35. The assembly as set forth in claim 34 wherein said outer
periphery of said heat exchanger has a heat exchanger width being
less than said module width and a heat exchanger height being less
than said module height.
36. A sealing system for a heat exchanger assembly in an HVAC
module comprising: an HVAC module including an interior surface
having a rectangular periphery to define a channel for air to flow
therethrough; said rectangular periphery having a module width and
a module height; a heat exchanger disposed in said rectangular
channel and having a first manifold and a second manifold extending
in spaced and parallel relationship to one another; each of said
first and second manifolds having a heat exchanger width being less
than said module width; each of said first and second manifolds
defining outer manifold surfaces facing opposite of one another and
defining a heat exchanger height being the distance between said
outer manifold surfaces and each of said first and second manifolds
defining inner manifold surfaces facing towards each other; said
heat exchanger height being less than said module height; a
plurality of tubes extending in spaced and parallel relationship to
one another transversely between said inner manifold surfaces of
said first and second manifolds of said heat exchanger for
establishing fluid communication between said first and second
manifolds; each of said tubes having a cross-section presenting
flat sides interconnected by a round front and a round back; said
plurality of tubes including a first tube disposed on one side of
said heat exchanger and having a first outer tube surface and a
last tube disposed on the other side of said heat exchanger and
having a last outer tube surface; said opposing outer manifold
surfaces of said first and second manifolds and said first and last
outer tube surfaces of said heat exchanger defining an outer
periphery having a rectangular shape to complement said rectangular
shape of said interior surface of said channel of said HVAC module;
a plurality of air fins disposed between adjacent tubes for
transferring heat from said tubes to the flow of air; one of said
outer periphery of said heat exchanger and said interior surface of
said channel of said HVAC module defining a plurality of male
connecting members being of rubber and extending toward the other
of said outer periphery of said heat exchanger and said interior
surface of said channel of said HVAC module; the other of said
outer periphery of said heat exchanger and said channel of said
HVAC module defining a plurality of female connecting members
engaging said male connecting members for supporting said heat
exchanger in said channel of said HVAC module and for sealing said
heat exchanger to said channel of said HVAC module to restrict the
flow of air from circumventing said heat exchanger; and said male
and female connecting members being tuned to give said heat
exchanger a natural frequency in the range of 45 and 70 Hz for
dampening vibrations between said heat exchanger and said HVAC
module.
37. The assembly as set forth in claim 36 wherein said male
connecting members are disposed on said outer periphery of said
heat exchanger and said female connecting members are disposed on
said interior surface of said HVAC module; each of said female
connecting members includes an isolating member having a tubular
shape and is of a resilient material for receiving and damping
vibrations between said heat exchanger and said HVAC module; each
of said female connecting members further includes a pair of
fingers extending outwardly from said tubular isolating member in
spaced and parallel relationship to one another to present a groove
therebetween; and each of said male connecting members is a flange
extending outwardly from said outer periphery of said heat
exchanger to engage said groove of said female connecting
member.
38. The assembly as set forth in claim 36 wherein said male
connecting members are disposed on said outer periphery of said
heat exchanger and said female connecting members are disposed on
said interior surface of said HVAC module; each of said female
connecting members is a hinge being of a polypropylene and
presenting two legs rotatably connected at a pivot point with one
of said legs engaging said interior surface of said HVAC module and
the other of said legs presenting a pair of fingers extending in
spaced and parallel relationship to present a groove therebetween;
each of said male connecting members is a flange extending
outwardly from said outer periphery of said heat exchanger to
engage said groove of said female connecting member; and each of
said female connecting members includes an isolating rubber web
extending between said legs of said hinge for dampening vibrations
between said heat exchanger and said HVAC module.
39. The assembly as set forth in claim 36 wherein each of said male
connecting members is a flange disposed on said interior surface of
said channel of said HVAC module and extends toward said heat
exchanger and said outer periphery of said heat exchanger presents
a groove to define said female connecting member for engaging said
flange.
40. The assembly as set forth in claim 36 wherein said male
connecting members are disposed on said outer periphery of said
heat exchanger and said female connecting members are disposed on
said interior surface of said HVAC module; each of said male
connecting members is a flange extending outwardly from said outer
periphery of said heat exchanger toward said interior surface of
said HVAC module; each of said female connecting members is a
flexible seal member being of a resilient material and extending
outwardly to a distal end from said interior surface of said HVAC
module toward said flange of said heat exchanger and presents a
pair of fingers extending outwardly from said distal end in spaced
and parallel relationship to one another and on either side of said
flange of said heat exchanger; and a plurality of seals extending
from said fingers of each of said female connecting members into
said groove to engage said flange of said male connecting
member.
41. The assembly as set forth in claim 36 wherein at least one of
said male and female connecting members defines a lip for catching
a condensate from said heat exchanger.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] A sealing system for sealing a heat exchanger assembly to an
HVAC module.
[0003] 2. Description of the Prior Art
[0004] Heat exchangers are used in automotive systems to either add
heat to a flow of air to warm the cabin of a vehicle or to remove
heat from the flow of air to cool the cabin. Generally, the heat
exchanger is manufactured separately from the vehicle and inserted
into the vehicle's HVAC module during the assembly process. The
heat exchanger must then be sealed to the HVAC module to restrict
air from circumventing the heat exchanger.
[0005] One sealing system is disclosed in U.S. Pat. No. 5,219,017,
issued to Halstead et al. (hereinafter referred to as Halstead
'017). The sealing system of the Halstead '017 patent includes an
HVAC module having an interior surface to define a channel for air
to flow therethrough. A heat exchanger having an outer periphery is
disposed in the channel of the HVAC module. The outer periphery of
the heat exchanger defines a connector for supporting the heat
exchanger in the channel of the HVAC module to restrict the flow of
air from circumventing the heat exchanger.
[0006] Although the Halstead '017 system restricts a portion of the
flow of air from circumventing the heat exchanger, there is still a
need to add additional seals to further restrict the flow of air
after the heat exchanger is inserted into the HVAC module.
SUMMARY OF THE INVENTION
[0007] The invention provides for such a sealing system and wherein
the connector is tuned to give the heat exchanger a natural
frequency in the range of 20 Hz and 100 Hz for dampening vibrations
between the heat exchanger and the HVAC module.
[0008] The invention provides for a system that is easier and
cheaper to install in the HVAC module of a vehicle than the prior
art systems because it locates, secures, locks and seals the heat
exchanger to the HVAC module without any additional pieces or
manufacturing steps. Further, it can be used with a wide variety of
heat exchanger designs, preferably those that have continuously
extruded manifolds. It is impervious to air, and decreases the
amount of labor required to install the heat exchanger into the
HVAC module because seals do not have to be added after the heat
exchanger is inserted into the HVAC module to adequately restrict
the flow of air from circumventing the heat exchanger. The system
also is quieter than the prior art systems by dampening vibrations
between the HVAC module and the heat exchanger by substantially
reducing the chance that the heat exchanger reaches resonance while
the vehicle is in operation. Lastly, it provides for a tighter
package that can fit within the constraints on the vehicle.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Other advantages of the present invention will be readily
appreciated, as the same becomes better understood by reference to
the following detailed description when considered in connection
with the accompanying drawings wherein:
[0010] FIG. 1 is a perspective view of a first embodiment of the
subject invention;
[0011] FIG. 2 is a cross-sectional view of the first embodiment of
the subject invention;
[0012] FIG. 3 is a front view of the first embodiment of the
subject invention;
[0013] FIG. 4 is a cross-sectional view of a second embodiment of
the subject invention;
[0014] FIG. 5 is a cross-sectional view of a third embodiment of
the subject invention;
[0015] FIG. 6 is a cross-sectional and exploded view of a fourth
embodiment of the subject invention; and
[0016] FIG. 7 is a cross-sectional view of a fifth embodiment of
the heat exchanger and the male connecting members.
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
[0017] Referring to the Figures, wherein like numerals indicate
corresponding parts throughout the several views, the invention is
a sealing system for a heat exchanger 20 assembly in an HVAC module
22.
[0018] As shown in FIG. 3, the HVAC module 22, generally indicated,
has an interior surface 24 with a rectangular periphery to define a
channel for air to flow therethrough, and the rectangular periphery
has a module width W.sub.m and a module height H.sub.m.
[0019] A heat exchanger 20, generally indicated, is disposed in the
rectangular channel. The heat exchanger 20 has a first manifold 26
and a second manifold 28 extending in spaced and parallel
relationship to one another, and each of the first and second
manifolds 26, 28 has a heat exchanger width W.sub.he. Each of the
first and second manifolds 26, 28 defines an outer manifold surface
30 and an inner manifold surface 32. The outer manifold surfaces 30
face opposite of one another to define a heat exchanger height
H.sub.he being the distance between the outer manifold surfaces 30.
The inner manifold surfaces 32 face towards each other.
[0020] The heat exchanger width W.sub.he is less than the module
width W.sub.m, and the heat exchanger height H.sub.he is less than
the module height H.sub.m for the heat exchanger 20 to fit into the
channel of the HVAC module 22.
[0021] A plurality of tubes 34 extend in spaced and parallel
relationship to one another transversely between the inner manifold
surfaces 32 of the first and second manifolds 26, 28 of the heat
exchanger 20 for establishing fluid communication between the first
and second manifolds 26, 28. Each of the tubes 34 has a
cross-section presenting flat sides interconnected by a round front
and a round back. A plurality of air fins 35 are disposed between
adjacent tubes 34 for transferring heat from the tubes 34 to the
flow of air.
[0022] As best shown in FIG. 1, the plurality of tubes 34 includes
a first tube 36 disposed on one side of the heat exchanger 20 and
having a first outer tube surface 38 and a last tube 40 disposed on
the other side of the heat exchanger 20 and having a last outer
tube surface 42.
[0023] The opposing outer manifold surfaces 30 of the first and
second manifolds 26, 28 and the first and last outer tube surfaces
38, 42 of the heat exchanger 20 combine to define an outer
periphery having a rectangular shape to complement the rectangular
shape of the interior surface 24 of the channel of the HVAC module
22.
[0024] One of the outer periphery of the heat exchanger 20 and the
interior surface 24 of the channel of the HVAC module 22 defines a
connector 44, 46 extending toward the other of the outer periphery
of the heat exchanger 20 and the interior surface 24 of the channel
of the HVAC module 22 for supporting the heat exchanger 20 in the
channel of the HVAC module 22 and for sealing the heat exchanger 20
to the channel of the HVAC module 22 to restrict the flow of air
from circumventing the heat exchanger 20. The connector 44, 46 is
tuned to give the heat exchanger 20 a natural frequency of between
20 and 100 Hz for dampening vibrations between the heat exchanger
20 and the HVAC module 22. More preferably, the connector 44, 46 is
tuned to give the heat exchanger 20 a natural frequency of between
45 and 70 Hz, and most preferably, the connector 44, 46 is tuned to
give the heat exchanger 20 a natural frequency of between 65 and 70
Hz. The connector 44, 46 may be tuned in a number of ways, e.g.
adjusting the material, size, and/or shape of the connector 44, 46.
In the exemplary embodiments, the connector 44, 46 includes a
plurality of male connecting members 44 and a plurality of female
connecting members 46 engaging the male connecting members 44.
However, the connector 44, 46 could be any other means of
supporting the heat exchanger 20 in the HVAC module 22.
[0025] In the exemplary embodiments, the male connecting members 44
are disposed on one of the outer periphery of the heat exchanger 20
and the interior surface 24 of the channel of the HVAC module 22
and extend toward the other of the outer periphery of the heat
exchanger 20 and the interior surface 24 of the channel of the HVAC
module 22. The other of the outer periphery of the heat exchanger
20 and the channel of the HVAC module 22 defines a plurality of
female connecting members 46, generally indicated, engaging the
male connecting members 44 for supporting the heat exchanger 20 in
the channel of the HVAC module 22 and for sealing the heat
exchanger 20 to the channel of the HVAC module 22 to restrict the
flow of air from circumventing the heat exchanger 20.
[0026] Preferably, one or both of the male and female connecting
members 44, 46 is made of a resilient material, e.g. rubber. The
material could be moldable and/or extrudable and is typically made
of a polymer and an overmolded elastomer. The resilient material
acts to seal 48 the heat exchanger 20 to the HVAC module 22 and to
dampen vibrations between the heat exchanger 20 and the HVAC module
22 to protect the heat exchanger 20 and to reduce the noise and
vibration transmission.
[0027] FIGS. 1 and 2 show a first embodiment of the subject
invention. In the first embodiment, the male connecting members 44
are disposed on the outer periphery of the heat exchanger 20 and
the female connecting members 46 are disposed on the interior
surface 24 of the HVAC module 22. Each of the female connecting
members 46 includes an isolating member 50 having a tubular shape.
The isolating member 50 is preferably of rubber for receiving and
damping vibrations between the heat exchanger 20 and the HVAC
module 22. A pair of fingers 52 extending outwardly from the
tubular isolating member 50 in spaced and parallel relationship to
one another to present a groove 54 therebetween. Each of the male
connecting members 44 disposed on the outer periphery of the heat
exchanger 20 is a flange 56 extending outwardly from the heat
exchanger 20 to engage the groove 54 of the female connecting
member 46.
[0028] FIG. 4 shows a second embodiment of the invention. In the
second embodiment, the outer periphery of the heat exchanger 20
presents a groove 54 to define the female connecting member 46. The
male connecting member 44 is a flange 56 disposed on the interior
surface 24 of the channel of the HVAC module 22. The flange 56
extends into and engages the groove 54 of the heat exchanger 20 to
support the heat exchanger 20 in the HVAC module 22. Preferably,
the flange 56 is of a resilient material to dampen vibrations
between the heat exchanger 20 and the HVAC module 22.
[0029] FIG. 5 shows a third embodiment of the invention. Each of
the female connecting members 46 of the third embodiment is a hinge
58 presenting two legs 60 rotatably connected at a pivot point 62.
One of the legs 60 engages the interior surface 24 of the HVAC
module 22 and the other of the legs 60 presents a pair of fingers
52 extending in spaced and parallel relationship to present a
groove 54 therebetween. Each of the male connecting members 44
disposed on the outer periphery of the heat exchanger 20 is a
flange 56 extending outwardly from the heat exchanger 20 to engage
the groove 54 of one of the female connecting members 46. Each of
the female connecting members 46 includes an isolating web 64
extending between the legs 60 of the hinge 58 for dampening
vibrations between the heat exchanger 20 and the HVAC module 22.
Preferably, the legs 60 of the hinge 58 are made of polypropylene,
or a similar polymeric material, and the isolating web 64 is made
of a resilient material, e.g. rubber.
[0030] FIG. 6 shows a fourth embodiment of the invention. In the
fourth embodiment, the male connecting members 44 are disposed on
the outer periphery of the heat exchanger 20 and the female
connecting members 46 are disposed on the interior surface 24 of
the HVAC module 22. Each of the male connecting members 44 is a
flange 56 extending outwardly from the outer periphery of the heat
exchanger 20 toward the interior surface 24 of the HVAC module 22.
Each of the female connecting members 46 is a flexible seal member
66 and extending outwardly to a distal end from the interior
surface 24 of the HVAC module 22 toward the flange 56 of the heat
exchanger 20 and presents a pair of fingers 52 extending outwardly
from the distal end in spaced and parallel relationship to one
another and on either side of the flange 56 of the heat exchanger
20. A plurality of seals 48 are disposed on the fingers 52 and
extend into the groove 54 to engage the flange 56 of the male
connecting member 44. Preferably, the flexible seal member 66 is
made of a resilient material.
[0031] At least one of the male and female connecting members 44,
46 may also define a lip 68 for collecting a condensate from the
heat exchanger 20 and draining that condensate. Such a system
prevents the buildup of standing water, which could result in
bacteria growth, e.g. mold. FIG. 7 shows a fifth embodiment of the
invention, wherein the male connecting member 44 presents such a
lip 68.
[0032] While the invention has been described with reference to an
exemplary embodiment, it will be understood by those skilled in the
art that various changes may be made and equivalents may be
substituted for elements thereof without departing from the scope
of the invention. In addition, many modifications may be made to
adapt a particular situation or material to the teachings of the
invention without departing from the essential scope thereof.
Therefore, it is intended that the invention not be limited to the
particular embodiment disclosed as the best mode contemplated for
carrying out this invention, but that the invention will include
all embodiments falling within the scope of the appended
claims.
* * * * *