U.S. patent application number 17/301161 was filed with the patent office on 2021-07-15 for tethered temperature sensor for use in rubber embedded applications.
This patent application is currently assigned to ContiTech Transportbandsysteme GmbH. The applicant listed for this patent is ContiTech Transportbandsysteme GmbH. Invention is credited to Daniel Fullenkamp, Paul John Peterson, Jack Bruce Wallace.
Application Number | 20210214027 17/301161 |
Document ID | / |
Family ID | 1000005540160 |
Filed Date | 2021-07-15 |
United States Patent
Application |
20210214027 |
Kind Code |
A1 |
Fullenkamp; Daniel ; et
al. |
July 15, 2021 |
TETHERED TEMPERATURE SENSOR FOR USE IN RUBBER EMBEDDED
APPLICATIONS
Abstract
One general aspect includes a tethered temperature sensor for
use within a vehicle track. The tethered temperature sensor
includes one or more sensors for measuring temperature located in a
high strain and high temperature region of the vehicle track. The
sensor also includes circuitry configured to control and/or monitor
the one or more sensors and located in a low strain and low
temperature region of the vehicle track. The sensor also includes a
housing to contain the circuitry. The sensor also includes an
encapsulating material that fills an interior of the housing.
Inventors: |
Fullenkamp; Daniel;
(Coldwater, OH) ; Peterson; Paul John; (Cuyahoga
Falls, OH) ; Wallace; Jack Bruce; (Powell,
OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ContiTech Transportbandsysteme GmbH |
Hannover |
|
DE |
|
|
Assignee: |
ContiTech Transportbandsysteme
GmbH
Hannover
DE
|
Family ID: |
1000005540160 |
Appl. No.: |
17/301161 |
Filed: |
March 27, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/EP2019/086218 |
Dec 19, 2019 |
|
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17301161 |
|
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62786627 |
Dec 31, 2018 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G01K 7/22 20130101; G01K
1/14 20130101; B62D 55/08 20130101; B60R 16/033 20130101; G01K
1/024 20130101; G01K 3/04 20130101; B60Q 9/00 20130101 |
International
Class: |
B62D 55/08 20060101
B62D055/08; G01K 1/14 20060101 G01K001/14; G01K 1/024 20060101
G01K001/024; G01K 3/04 20060101 G01K003/04; G01K 7/22 20060101
G01K007/22; B60R 16/033 20060101 B60R016/033; B60Q 9/00 20060101
B60Q009/00 |
Claims
1. A tethered temperature sensor for use Within a vehicle track,
the sensor comprising: one or more sensors for measuring
temperature located in a high strain and high temperature region of
the vehicle track; circuitry configured to control and/or monitor
the one or more sensors and located in a low strain and low
temperature region of the vehicle track; a housing to contain the
circuitry; an encapsulating material that fills an interior of the
housing; a conductive tether embedded within the rubber track and
configured to connect to the one or more sensors; and the
conductive tether is comprised of a flexible conductive material
and provides at least 300 percent elongation.
2. The sensor of claim 1, the conductive tether configured to
electrically connect the one or more sensors to the circuitry.
3. The sensor of claim 1, further comprising a transceiver
configured to transmit measured temperatures from the one or more
sensors.
4. The sensor of claim 3, further comprising one or more antenna
connected to the transceiver.
5. The sensor of claim 3, wherein the transceiver is configured to
utilize one or more communication protocols selected from a group
comprising, radio frequency (RF), RFID, Bluetooth, WiFi, 4G and
5G.
6. The sensor of claim 3, wherein the transceiver is external to
the housing.
7. The sensor of claim 3, wherein the transceiver is positioned
within the housing.
8. The sensor of claim 3, wherein the transceiver is configured to
transmit measured temperatures from the one or more sensors and the
circuitry to a remote tracking system.
9. The sensor of claim 8, wherein the remote tracking system is
configured to generate an alert based on a selected alarm range of
temperatures.
10. The sensor of claim 1, wherein the circuitry is configured to
determine a track temperature of a tread portion of the track based
measurements of the one or more temperature sensors.
11. The sensor of claim 1, wherein the circuitry determines a track
temperature based on an average of measured temperatures from the
one or more temperature sensors over a time period.
12. The sensor of claim 11, wherein the time period is selected
from a range of 10 milliseconds (ms) to 60 seconds.
13. The sensor of claim 1, wherein the one or more sensors comprise
an integrated circuit (IC).
14. The sensor of claim 1, the flexible material comprises a
plurality of flexible conductive elements.
15. The sensor of claim 1, the conductive tether is configured to
operate as an antenna.
16. The sensor of claim 1, the housing is comprised of metal.
17. The sensor of claim 1, wherein the one or more sensors comprise
one or more thermistors.
18. The sensor of claim 1, further comprising a power source
configured to supply power for operation of the one or more sensors
and the circuitry.
19. The sensor of claim 18, wherein the power source is a
battery.
20. The sensor of claim 18, wherein the power source is configured
to passively provide power to the one or more sensors.
21. The sensor of claim 1, wherein the circuitry is configured to
generate temperature over time and/or over distance traveled.
Description
FIELD OF THE INVENTION
[0001] The field to which the disclosure generally relates is
rubber products exposed to high temperature conditions, and in
particular using tethered temperature sensors embedded in rubber
products for temperature measurement and monitoring of the rubber
product.
BACKGROUND
[0002] Rubber products provide many benefits including traction,
durability, repairability and the like when compared with other
technologies.
[0003] However, rubber products can be susceptible to degradation
due to high temperatures and the like. Such temperatures can be
based on environmental conditions or use. As a result, this
degradation can result to shortened product lifetime, failures and
the like.
[0004] What is needed are techniques to monitor operating
conditions of rubber products.
LIST OF FIGURES
[0005] FIG. 1 is a cut away view of a track in accordance with one
or more embodiments.
[0006] FIG. 2 is a diagram illustrating a sectional perspective and
cut away view of the track in accordance with one or more
embodiments.
[0007] FIG. 3 is a diagram illustrating a tethered temperature
sensor in accordance with one or more embodiments.
[0008] FIG. 4 is a diagram illustrating the electronic component in
additional detail in accordance with one or more embodiments.
DETAILED DESCRIPTION
[0009] The field to which the disclosure generally relates is
rubber products exposed to high temperature conditions, and in
particular using tethered temperature sensors embedded in rubber
products for temperature measurement and monitoring of the rubber
product.
[0010] The following description of the variations is merely
illustrative in nature and is in no way intended to limit the scope
of the disclosure, its application, or uses. The description is
presented herein solely for the purpose of illustrating the various
embodiments of the disclosure and should not be construed as a
limitation to the scope and applicability of the disclosure. In the
summary of the disclosure and this detailed description, each
numerical value should be read once as modified by the term "about"
(unless already expressly so modified), and then read again as not
so modified unless otherwise indicated in context. Also, in the
summary of the disclosure and this detailed description, it should
be understood that a value range listed or described as being
useful, suitable, or the like, is intended that any and every value
within the range, including the end points, is to be considered as
having been stated. For example, "a range of from 1 to 10" is to be
read as indicating each and every possible number along the
continuum between about 1 and about 10. Thus, even if specific data
points within the range, or even no data points within the range,
are explicitly identified or refer to only a few specific, it is to
be understood that inventors appreciate and understand that any and
all data points within the range are to be considered to have been
specified, and that inventors had possession of the entire range
and all points within the range.
[0011] Unless expressly stated to the contrary, "or" refers to an
inclusive or and not to an exclusive or. For example, a condition A
or B is satisfied by anyone of the following: A is true (or
present) and B is false (or not present), A is false (or not
present) and B is true (or present), and both A and B are true (or
present).
[0012] In addition, use of the "a" or "an" are employed to describe
elements and components of the embodiments herein. This is done
merely for convenience and to give a general sense of concepts
according to the disclosure. This description should be read to
include one or at least one and the singular also includes the
plural unless otherwise stated.
[0013] The terminology and phraseology used herein is for
descriptive purposes and should not be construed as limiting in
scope. Language such as "including," "comprising," "having,"
"containing," or "involving," and variations thereof, is intended
to be broad and encompass the subject matter listed thereafter,
equivalents, and additional subject matter not recited.
[0014] Also, as used herein any references to "one embodiment" or
"an embodiment" means that a particular element, feature,
structure, or characteristic described in connection with the
embodiment is included in at least one embodiment. The appearances
of the phrase "in one embodiment" in various places in the
specification are not necessarily referring to the same
embodiment.
[0015] As utilized herein, terms "component," "system,"
"interface," and the like are intended to refer to a
computer-related entity, hardware, software (e.g., in execution),
and/or firmware. For example, a component can be a processor, a
process running on a processor, a controller, an object, an
executable, a program, a storage device, and/or a computer with a
processing device. By way of illustration, an application running
on a server and the server can also be a component. One or more
components can reside within a process, and a component can be
localized on one computer and/or distributed between two or more
computers. A set of elements or a set of other components can be
described herein, in which the term "set" can be interpreted as
"one or more."
[0016] Further, these components can execute from various computer
readable storage media having various data structures stored
thereon such as with a module, for example. The components can
communicate via local and/or remote processes such as in accordance
with a signal having one or more data packets (e.g., data from one
component interacting with another component in a local system,
distributed system, and/or across a network, such as, the Internet,
a local area network, a wide area network, or similar network with
other systems via the signal).
[0017] As another example, a component can be an apparatus with
specific functionality provided by mechanical parts operated by
electric or electronic circuitry, in which the electric or
electronic circuitry can be operated by a software application or a
firmware application executed by one or more processors. The one or
more processors can be internal or external to the apparatus and
can execute at least a part of the software or firmware
application. As yet another example, a component can be an
apparatus that provides specific functionality through electronic
components without mechanical parts; the electronic components can
include one or more processors therein to execute software and/or
firmware that confer(s), at least in part, the functionality of the
electronic components.
[0018] As used herein, the term "circuitry" may refer to, be part
of, or include an Application Specific Integrated Circuit) ASIC (an
electronic circuit, a processor) shared, dedicated, or group),
and/or memory) shared, dedicated, or group (that execute one or
more software or firmware programs, a combinational logic circuit,
and/or other suitable hardware components that provide the
described functionality. In some embodiments, the circuitry may be
implemented in, or functions associated with the circuitry may be
implemented by, one or more software or firmware modules. In some
embodiments, circuitry may include logic, at least partially
operable in hardware.
[0019] For some rubber products, such as rubber tracks, operating
loaded equipment having rubber tracks driven or otherwise conveyed
higher speeds and on hard surfaces may result in significant heat
build-up within the track, which may lead to track degradation, or
even ultimately, track failure. In accordance with the disclosure,
utilizing a temperature sensor to monitor the internal temperature
of the track and monitoring that temperature in the cab of the
vehicle utilizing this sensor, proactive steps can be taken to
avoid track degradation prior to the temperature reaching a
critical level for track degradation to occur.
[0020] Some embodiments according to the disclosure include one or
more tethered temperature sensors embedded into a rubber product,
where the tethered temperature sensor includes a sensor component
connected to an electronic component. Generally, the electronic
component and sensor component are separated due to the temperature
ranges the sensor component would be exposed to, which may be
temperatures values higher than the survivability of the electronic
circuit board and battery included in the electronic component.
Accordingly, the sensor component is disposed in a high temperature
region of the rubber product, while the electronic component
disposed in a comparatively low temperature region of the same
product. In some aspects, leads running between, and connecting the
sensor component to the electronic component may also perform as an
antenna structure. In some aspects, the tethered temperature
sensors include the electronic component secured and protected in a
suitable potting material, prior to being integrated into the
rubber product.
[0021] The tethered temperature sensors according to the disclosure
may be incorporated into the rubber product by any suitable
technique such as building the rubber product with the tethered
temperature sensor(s) provided in the rubber product prior to
curing, or, in some other aspects, integrating the tethered
temperature sensor(s) into the rubber product after curing.
[0022] FIG. 1 is a cut away view of a track 100 in accordance with
one or more embodiments. FIG. 1 shows a sectional perspective and
cut away view of a track 100, which is one example of a rubber
product in which some embodiments of the disclosure may be
integrated. It is appreciated that the track 100 is provided for
illustrative purposes and that suitable variations are
contemplated.
[0023] Track 100 includes a plurality of ground engaging lugs 106,
located on both sides of the track, as shown. The ground engaging
lugs 106 generally have a hot region 104 and cold region 102. Hot
regions 104 are generally those portions of the track which
encounter significantly high temperature during operation of the
vehicle propelling the track, for example, temperatures of 150
degrees Celsius (C) and above, 170 deg C. and above, or even 190
deg C. and above.
[0024] FIG. 2 is a diagram illustrating a sectional perspective and
cut away view of the track 100 in accordance with one or more
embodiments. FIG. 2 shows the sectional perspective and cut away
view of track 100 including tethered temperature sensors embedded
in track 100. FIG. 2 is provided for illustrative purposes as an
example and it is appreciated that suitable variations are
contemplated.
[0025] The tethered temperature sensors include electronic
component 210, sensor component 208, within a single ground
engaging lug 106, and which are connected by lead(s) 212. It is
noted that electronic component 210, sensor component 208, and
lead(s) 212 are contained within the individual ground engaging lug
106, in the embodiment shown. In some aspects, the electronic
component 210 is located where there is not direct contact with
wheels.
[0026] The temperature sensors that could be used in the tethered
temperature sensors, include thermocouples, thermistors, infrared
sensors, resistance temperature detectors, s/c devices, and the
like.
[0027] The tethered temperature sensors have capability of
transmitting temperature data to any suitable receiving apparatus,
such as, but not limited to, those disclosure in U.S. Pat. No.
8,742,915B2, the disclosure of which is incorporated herein in it
is entirety, by reference thereto. On example of a suitable
temperature receiving apparatus is a Continental Tire Pressure
Monitoring System having temperature monitoring capability. Some
non-limiting examples of transmitting modulations including AM, FM,
FSM to optimize signal transmission.
[0028] FIG. 3 is a diagram illustrating a tethered temperature
sensor 300 in accordance with one or more embodiments. In this
example, the tethered temperature sensor 300 includes a potted
electronic component 302 having an electronic circuit board and
battery therein. A plurality of leads 304 (or otherwise electrical
conductors) are connected to temperature sensor component 308, and
may also perform as an antenna structure. In some aspects, the
leads 304 are partially disposed in a temperature protecting sheath
306, where located in a hot region of a rubber product.
[0029] The temperature protecting sheath 306 can extend from the
component 302 to the sensor component 308. In another example, the
sheath 306 extends from the sensor component 308 until a distance
from the electronic component 302. In yet another example, the
sheath 306 extends from the electronic component until a second
distance from the sensor component 308.
[0030] The sensor component 308 is a temperature sensor. The sensor
component 308 can include one or a plurality of temperature
sensors. Furthermore, the sensor component 308 can include other
types of sensors in addition to and/or instead of temperature
sensors such as, but not limited to, pressure sensor, humidity
sensor, and the like.
[0031] The electronic component 302 can include a housing that at
least partially encases and/or protects the electronic component
302. The housing has a material selected to mitigate temperature
and/or strain from impacting the electronic component 302.
[0032] The electronic component 302 includes circuitry configured
to obtain measurement information and the like from the sensor 308.
The electronic component 302 can also include other elements such
as transceivers, antennas, signal processing circuitry, modulation
circuitry, and the like.
[0033] The electronic component 302 is typically positioned to be
in a lower strain and/or lower temperature regions of the rubber
product whereas the sensor component 308 is located in a higher
strain and/or higher temperature region of the rubber product. In
one example, a lower temperature region is a region that is less
than about 150 degrees Fahrenheit (F) during operational use of the
rubber product. In another example, a lower temperature region is a
region that is less than about 140 degrees F. during operation use
of the rubber product. An example of a lower strain region is a
region having a strain less than about 100 percent, 200 percent and
the like. An example of a higher temperature region is a region
that has a temperature exceeding 150 degrees F. An example of a
higher strain region is a region having a strain level greater than
about 200 percent or 300 percent. The higher strain region can also
be a load bearing region, such as a load bearing tread of a vehicle
track.
[0034] In yet another example, the electronic component 302 is the
component 210 described above and can be positioned in the cold
region 102. The lead 304 is the leads 212 and the sensor component
308 is the sensor component 208, which is positioned in the hot
region 104.
[0035] FIG. 4 is a diagram illustrating the electronic component
302 in additional detail in accordance with one or more
embodiments. The component 302 can be used with the
embodiments/examples shown in the above figures. It is appreciated
that suitable variations are contemplated.
[0036] The component 302 includes a housing 406, circuitry 402, one
or more transceivers 404 and an encapsulating or potting material
408. The housing 406 is configured to protect the circuitry 402
and/or the transceivers 404.
[0037] The electronic component 302 can also include other elements
such as, antennas, signal processing circuitry, modulation
circuitry, power storage, battery and the like.
[0038] The potting material 408 can be made of a ceramic type
material or equivalent (to extend the life of a battery) where the
potting material has been selected where the thermal conductivity
is significantly lower then that of rubber and where a
significantly lower thermal conductive material is used as a
potting compound the internal sensor is mounted close to the
external surface of the potting material or the sensor is exposed
to the outer shell via a thermally conductive metal strip.
[0039] It is appreciated that in some embodiments, methods or
mechanisms for saving battery life are used. For example, sensor
activation may be based on motion. Additionally, a supervisor
beacon may be enabled allowing for security monitoring of the
asset.
[0040] As described above, in some aspects, the electronic
component and sensor component are separated due to environmental
conditional requirement for temperature range, where the
temperature sensor will be measuring temperatures above the
survivability of the electronic circuit board and battery. Rigid
durable packaging for the electronic may be used to provide
isolation from rubber strains, or even potted electronic packages
may also offer strain isolation while being able to handle the high
stresses associated with application.
[0041] The leads, or otherwise conductive elements, are used to
link the electronic component to the temperature sensor component.
In some aspects, linking the electronic component to the
temperature sensor component may be made by a connection such as a
sine wave pattern of wire, flexible conductive element(s), braided
conductive element(s), rigid protected conductive element, and the
like. Some examples of flexible conductive elements include those
disclosed in U.S. Pat. Nos. 9,452,892 and 6,352,149, the
disclosures of which is incorporated herein in their entirety, by
reference thereto.
[0042] In some aspects of the disclosure, embodiments also provide
survivability of the high applied stresses during operation,
survivability of sensors in the high strain areas during operation,
or even electronic component survivability at temperatures required
to be monitored. Additionally, reliable transmission of sensor data
is possible from electronics embedded in rubber, as well as
proximity to metallic components of the rubber product and
surrounding structure of the equipment. Additionally, some
embodiments according to the disclosure have the ability to provide
temperature sensor and electronics which survive molded and cured
rubber product manufacturing processes. In some other aspects,
reduction of battery requirements by using regenerative
technologies such as piezoelectric transducer, or even use of
pyroelectric devices to energize electronic circuits when track is
in use, are possible advantages.
[0043] In addition to the track applications described above,
embodiments of the disclosure may be integrated and used with other
suitable rubber products, such as but not limited to, tires,
conveyor belts, air springs, molded products, high temperature
hoses, and the like. Additionally, in some aspects, temperature
measurements made in accordance with the disclosure could be used
to control a vehicle through a vehicle control module to slow the
speed of, or even stop the vehicle, as a proactive measure. In some
further aspects, systems may capture an absolute threshold, or rate
of rise in temperature, or both to provide direct feedback to slow
or stop the vehicle.
[0044] In one example, the remote sensor 308 is located directly
under a wheel and or where the exposed pressure is enough to crush
remote sensor circuitry. The remote sensor is protected with a
metal structure or equivalent as a sensor housing to mitigate or
prevent damage to the remote sensor. An example of a suitable metal
structure is a metal cylinder. It is appreciated that other
structurers and the like that protect and/or mitigate crushing of
the sensor 308 are contemplated.
[0045] In another example, a battery is used as a power source for
the electronics component 302. A potting material can be used to
encase the battery and/or circuitry. The potting material can be
made of a ceramic type material or equivalent (to extend the life
of the battery) where the potting material has been selected where
the thermal conductivity is significantly lower then that of rubber
and where a significantly lower thermal conductive material is used
as a potting compound the internal sensor is mounted close to the
external surface of the potting material or the sensor is exposed
to the outer shell via a thermally conductive metal strip.
[0046] In another example, a hard epoxy, ceramic material and the
like can be used to mitigate sheer as the tether/lead transitions
from the hard epoxy or ceramic like material into the rubber a
silicon or like material, which is introduced in the molding
process at the boundary of the as the tether exits the mold.
[0047] In yet another example, to support the manufacture of the
electronics/circuitry of the electronics component 302, a
pre-molded thin walled cup is used to position and support the
electronics and hold a silicon like transition material. The epoxy
or like material is poured into the cup with the electronics. The
cup becomes part of the enclosure/housing.
[0048] In another example, a rubber material or the like is located
around or surrounds the temperature sensor 308 to facilitate
conduction of heat (thermal energy) to the sensor 308 to assist
accuracy and real time temperature reading. In another example, a
material is selected to surround the sensor 308 based on a selected
or desired time delay in the detection of the temperature.
[0049] One general aspect includes a tethered temperature sensor
for use within a vehicle track. The tethered temperature sensor
also includes one or more sensors for measuring temperature located
in a high strain and high temperature region of the vehicle track.
The sensor also includes circuitry configured to control and/or
monitor the one or more sensors and located in a low strain and low
temperature region of the vehicle track. The sensor also includes a
housing to contain the circuitry. The sensor also includes an
encapsulating material that fills an interior of the housing.
[0050] Implementations may include one or more of the following
features. The sensor may include a conductive tether configured to
electrically connect the one or more sensors to the circuitry. The
sensor, may include a transceiver configured to transmit measured
temperatures from the one or more sensors. The sensor may include
one or more antenna connected to the transceiver. The transceiver
is configured to utilize one or more communication protocols or
standards selected from a group may include, radio frequency (RF),
RFID, Bluetooth, Wifi, 4G and 5G. The transceiver is external to
the housing. The transceiver is positioned within the housing. The
transceiver is configured to transmit measured temperatures from
the one or more sensors and the circuitry to a remote tracking
system. The remote tracking system is configured to generate an
alert based on a selected alarm range of temperatures. The
circuitry is configured to determine a track temperature of a tread
portion of the track based on measurements of the one or more
temperature sensors. The circuitry determines a track temperature
based on an average of measured temperatures from the one or more
temperature sensors over a time period. The time period is selected
from a range of 10 milliseconds (ms) to 60 seconds. The one or more
sensors may include an integrated circuit (IC). The sensor may
include a conductive tether embedded within the rubber track and
configured to connect to the one or more sensors. The conductive
tether is/can be configured to operate as an antenna. The
conductive tether is may include of a flexible conductive material
and provides at least 300 percent elongation. The one or more
sensors may include one or more thermistors. The sensor may include
a power source configured to supply power for operation of the one
or more sensors and the circuitry. The power source is a battery.
The power source is configured to passively provide power to the
one or more sensors. The circuitry is configured to generate
temperature over time and/or over distance traveled.
[0051] The foregoing description of the embodiments has been
provided for purposes of illustration and description. Example
embodiments are provided so that this disclosure will be
sufficiently thorough, and will convey the scope to those who are
skilled in the art. Numerous specific details are set forth such as
examples of specific components, devices, and methods, to provide a
thorough understanding of embodiments of the disclosure, but are
not intended to be exhaustive or to limit the disclosure. It will
be appreciated that it is within the scope of the disclosure that
individual elements or features of a particular embodiment are
generally not limited to that particular embodiment, but, where
applicable, are interchangeable and can be used in a selected
embodiment, even if not specifically shown or described. The same
may also be varied in many ways. Such variations are not to be
regarded as a departure from the disclosure, and all such
modifications are intended to be included within the scope of the
disclosure.
[0052] Also, in some example embodiments, well-known processes,
well-known device structures, and well-known technologies are not
described in detail. Further, it will be readily apparent to those
of skill in the art that in the design, manufacture, and operation
of apparatus to achieve that described in the disclosure,
variations in apparatus design, construction, condition, erosion of
components, gaps between components may present, for example.
[0053] Although the terms first, second, third, etc. may be used
herein to describe various elements, components, regions, layers
and/or sections, these elements, components, regions, layers and/or
sections should not be limited by these terms. These terms may be
only used to distinguish one element, component, region, layer or
section from another region, layer or section. Terms such as
"first," "second," and other numerical terms when used herein do
not imply a sequence or order unless clearly indicated by the
context. Thus, a first element, component, region, layer or section
discussed below could be termed a second element, component,
region, layer or section without departing from the teachings of
the example embodiments.
[0054] Spatially relative terms, such as "inner", "adjacent",
"outer," "beneath," "below," "lower," "above," "upper," and the
like, may be used herein for ease of description to describe one
element or feature's relationship to another element(s) or
feature(s) as illustrated in the figures. Spatially relative terms
may be intended to encompass different orientations of the device
in use or operation in addition to the orientation depicted in the
figures. For example, if the device in the figures is turned over,
elements described as "below" or "beneath" other elements or
features would then be oriented "above" the other elements or
features. Thus, the example term "below" can encompass both an
orientation of above and below. The device may be otherwise
oriented (rotated 90 degrees or at other orientations) and the
spatially relative descriptors used herein interpreted
accordingly.
[0055] Although a few embodiments of the disclosure have been
described in detail above, those of ordinary skill in the art will
readily appreciate that many modifications are possible without
materially departing from the teachings of this disclosure.
Accordingly, such modifications are intended to be included within
the scope of this disclosure as defined in the claims.
* * * * *