U.S. patent application number 16/048254 was filed with the patent office on 2019-05-02 for explosion proof assembly.
The applicant listed for this patent is Xciel, Inc.. Invention is credited to Xavier Balourdet.
Application Number | 20190132434 16/048254 |
Document ID | / |
Family ID | 63685434 |
Filed Date | 2019-05-02 |
View All Diagrams
United States Patent
Application |
20190132434 |
Kind Code |
A1 |
Balourdet; Xavier |
May 2, 2019 |
EXPLOSION PROOF ASSEMBLY
Abstract
An explosion proof assembly that includes a first portion with a
window; an outer touchscreen adhesively sealed around a perimeter
of the first portion rear face; and a second portion releasably
coupled to the first portion. The second portion has a second
portion inner surface defined by a second portion inner edge that
transitions into a first dissipation wall. The first portion has a
second dissipation wall. The assembly includes a mobile device
operable via a mobile device touchscreen. Upon assembly, the outer
touchscreen is transmissive to the mobile device touchscreen.
Inventors: |
Balourdet; Xavier; (Houston,
TX) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Xciel, Inc. |
Katy |
TX |
US |
|
|
Family ID: |
63685434 |
Appl. No.: |
16/048254 |
Filed: |
July 28, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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15798080 |
Oct 30, 2017 |
10097677 |
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16048254 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04M 1/18 20130101; G06F
3/041 20130101; G06F 1/1656 20130101; H02J 7/025 20130101; H04B
1/3888 20130101; G02B 7/02 20130101 |
International
Class: |
H04M 1/18 20060101
H04M001/18; H04B 1/3888 20150101 H04B001/3888; H02J 7/02 20160101
H02J007/02; G06F 1/16 20060101 G06F001/16 |
Claims
1. An explosion proof assembly comprising: a first portion
comprising a first portion rear face, a first portion outer edge, a
first portion inner edge, a second dissipation wall, a pin housing
receptacle, and a window; an outer touchscreen adhesively sealed
around a perimeter of the first portion rear face; a second portion
comprising a second portion inner face, a pin housing, a second
portion inner surface defined by a second portion inner edge that
transitions into a first dissipation wall; a mobile device disposed
between the window and the second portion inner face, the mobile
device being operable via a mobile device touchscreen; wherein the
first portion and the second portion are releasably coupled to each
other to form an enclosure, wherein the pin housing mates within
the pin housing receptacle, wherein upon assembly the outer
touchscreen is engaged with and transmissive to the mobile device
touchscreen, wherein the second dissipation wall is adjacent to the
first dissipation wall, wherein a portion of the first dissipation
wall protrudes into the second dissipation wall, the portion being
square in shape in lateral side cross section view of the explosion
proof assembly.
2. The explosion proof assembly of claim 1, wherein the mobile
device comprises an on-off button, wherein the pin housing
comprises a movable pin, wherein upon assembly the movable pin is
aligned with the on-off button, and wherein depressing of the
movable pin results in depressing the on-off button.
3. The explosion proof assembly of claim 2, wherein the first
portion comprise a plurality of first mating apertures, wherein the
second portion comprises a plurality of second mating apertures
corresponding to the plurality of first mating apertures, wherein
each respective first mating aperture and second mating aperture
has a fastener disposed therein, wherein each fastener is tightened
to a torque value in the range of 5 Newtonmeter to 6
Newtonmeter.
4. The explosion proof assembly of claim 3, wherein the mobile
device is configured for taking photos via a camera lens, wherein
the second portion comprises a lens window, and wherein upon
assembly the camera lens and the lens window are aligned.
5. The explosion proof assembly of claim 1, wherein the mobile
device is configured for taking photos via a camera lens, wherein
the second portion comprises a lens window, and wherein upon
assembly the camera lens and the lens window are aligned.
6. The explosion proof assembly of claim 5, wherein the mobile
device is configured for electromagnetic wireless recharging
functionality, and wherein the second portion comprises a second
portion window sealingly closed off.
7. The explosion proof assembly of claim 1, wherein the mobile
device is configured for electromagnetic wireless recharging
functionality, and wherein the second portion comprises a second
portion window sealingly closed off.
8. The explosion proof assembly of claim 1, wherein upon coupling
the assembly is configured to at least partially dissipate a flame
resultant from an explosion of the mobile device.
9. An explosion proof assembly comprising: a first portion
comprising a first portion rear face, a first portion outer edge, a
first portion inner edge, a second dissipation wall, a pin housing
receptacle, and a window; an outer touchscreen adhesively sealed
around a perimeter of the first portion rear face; a second portion
comprising a second portion inner face, a pin housing, a second
portion inner surface defined by a second portion inner edge that
transitions into a first dissipation wall; a mobile device disposed
between the window and the second portion inner face, the mobile
device being operable via a mobile device touchscreen; wherein the
first portion and the second portion are releasably coupled to each
other to form an enclosure, wherein the pin housing mates within
the pin housing receptacle, wherein upon assembly the outer
touchscreen is engaged with and transmissive to the mobile device
touchscreen, wherein the second dissipation wall is adjacent to the
first dissipation wall, wherein a ridged portion of the first
dissipation wall protrudes into the second dissipation wall,
wherein the mobile device comprises an on-off button, wherein the
pin housing comprises a movable pin, wherein upon assembly the
movable pin is aligned with the on-off button, wherein depressing
of the movable pin results in depressing the on-off button, and
wherein upon coupling the assembly is configured to at least
partially dissipate a flame resultant from an explosion of the
mobile device.
10. The explosion proof assembly of claim 9, wherein the mobile
device is configured for taking photos via a camera lens, wherein
the second portion comprises a lens window, and wherein upon
assembly the camera lens and the lens window are aligned, and
wherein the ridged portion is square-shaped in lateral
cross-section.
11. The explosion proof assembly of claim 10, wherein the first
portion comprise a plurality of first mating apertures, wherein the
second portion comprises a plurality of second mating apertures
corresponding to the plurality of first mating apertures, wherein
each respective first mating aperture and second mating aperture
has a fastener disposed therein, and wherein each fastener is
tightened to a torque value in the range of 5 Newtonmeter to 6
Newtonmeter.
12. The explosion proof assembly of claim 11, wherein the mobile
device is configured for electromagnetic wireless recharging
functionality, and wherein the second portion comprises a second
portion window sealingly closed off.
13. The explosion proof assembly of claim 9, wherein the mobile
device is configured for electromagnetic wireless recharging
functionality, and wherein the second portion comprises a second
portion window sealingly closed off.
14. An explosion proof assembly comprising: a first portion
comprising a first portion rear face, a first portion outer edge, a
pin housing receptacle, a first portion inner edge, a second
dissipation wall, and a window; an outer touchscreen adhesively
sealed around a perimeter of the first portion rear face; a second
portion releasably coupled to the first portion to form an
enclosure, the second portion further comprising a pin housing, a
second portion inner surface defined by a second portion inner edge
that transitions into a first dissipation wall extending
substantially therearound, and a third dissipation wall; and a
mobile device disposed within the enclosure, the mobile device
being operable via a mobile device touchscreen; wherein the pin
housing mates within the pin housing receptacle, wherein upon
coupling the outer touchscreen is transmissive to the mobile device
touchscreen of a touch actuation signal made thereon, wherein the
mobile device comprises an input connector, wherein the mobile
device comprises an on-off button, wherein the pin housing
comprises a movable pin, wherein upon assembly the movable pin is
aligned with the on-off button, and wherein depressing of the
movable pin results in depressing the on-off button.
15. The explosion proof assembly of claim 14, wherein the first
portion comprise a plurality of first mating apertures, wherein the
second portion comprises a plurality of second mating apertures
corresponding to the plurality of first mating apertures, wherein
each respective first mating aperture and second mating aperture
has a fastener disposed therein, wherein each fastener is tightened
to a torque value in the range of 5 Newtonmeter to 6
Newtonmeter.
16. The explosion proof assembly of claim 14, wherein the mobile
device is configured for taking photos via a camera lens, wherein
the second portion comprises a lens window, and wherein upon
assembly the camera lens and the lens window are aligned.
17. The explosion proof assembly of claim 16, wherein upon coupling
the assembly is configured to at least partially dissipate a flame
resultant from an explosion of the mobile device prior to any
portion of the flame exiting the assembly.
18. The explosion proof assembly of claim 17, wherein the mobile
device is configured for electromagnetic wireless recharging
functionality, and wherein the second portion comprises a second
portion window sealingly closed off.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. non-provisional
application Ser. No. 15/798,080, filed Oct. 30, 2017. The entirety
of each application is incorporated herein by reference for all
purposes.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not Applicable.
BACKGROUND
Background of the Disclosure
[0003] The use of electrical devices in hazardous areas may lead to
an increased risk of a fire or explosion triggered by the presence
of the electrical device. For instance, an electrical device may
serve as an ignition source in a hazardous area containing
flammable gasses, vapors or dust. For this reason, electrical
devices used in hazardous areas are often required to be certified
according to the requirements specified in that particular
jurisdiction. Further, often the types of protections required vary
depending on the risks and hazards involved.
[0004] Hazardous environments have been categorized and regulated,
but the specific classification, regulating, and governing thereof
depends on jurisdiction. Electrical codes and standards for
hazardous areas are generally understood as having two distinct
paths. In North America, a `Class, Division` system has been
utilized, whereas other parts of the world use a `Zone System`
based predominantly on standards from the International
Eletrochemical Commission (IEC) and European Community for
Electrotechnical Standardization (CENELEC). A main difference is in
the Zone system is that the level of hazard probability is divided
into three `zones` as opposed to two `divisions`
[0005] The types of hazardous environments are broken down into
three classes, with each class focusing on different types of
hazardous materials in the surrounding atmosphere. For instance:
Class I areas include flammable gasses or vapors present in the air
in sufficient quantities to produce an explosion in the presence of
an ignition source; Class II areas include the presence of
combustible dusts; and Class III areas include ignitable fibers or
other materials too heavy to be suspended in the air in sufficient
quantities to produce an ignitable mixture (e.g., wood chips,
cotton, nylon, etc.).
[0006] Two common types of hazardous areas requiring protection for
electrical devices are areas that contain flammable vapors and
areas containing dust or other particulates susceptible to
ignition. Further, each class is divided into two divisions based
on the probability of hazardous materials being present in an
ignitable or combustible concentration in the surrounding air.
Division 1 defines hazardous environments where the pertinent
hazardous material (e.g., vapors, dust, fibers) is present during
normal conditions. Division 2 defines hazardous environments where
the pertinent hazardous material is present only in abnormal or
fault conditions (e.g., in the event of a container failure or
other leak).
[0007] Regarding Class I hazardous environments involving flammable
vapors, an electrical device may be used in such an area via an
explosion proof enclosure or assembly configured to keep an
internal explosion within the explosion proof enclosure from
escaping outward, where it would ignite vapors outside of the
enclosure. Thus, with regard to environments having flammable
vapors, explosion proof assemblies are designed to both reduce the
entry of flammable materials into the enclosure and also, in the
event of an explosion within the enclosure, to prevent the escape
of hot or burning material from escaping the enclosure.
[0008] Regarding Class II hazardous environments involving
ignitable dusts and particulates, an electrical device may be used
in such an area via a dust-ignition proof enclosure or assembly
that is configured to prevent ignitable materials from entering the
enclosure and by containing any arcs, sparks or heat within the
enclosure that may ignite dust or other particulates in the
surrounding environment. Also, there exists assemblies and
enclosures for use with an electrical device that are referred to
as "intrinsically safe," where an intrinsically safe assembly
including an electrical device is incapable of releasing sufficient
electrical or thermal energy to cause ignition of a specific
hazardous substance (i.e., Class I, Class II and Class III
substances) under normal or abnormal conditions. Further,
"non-incendive" components are non-sparking and can be used in
Div1, Zone1 areas when coupled with explosion proof enclosure.
[0009] While assemblies or enclosures have been developed for use
in hazardous areas, these components are often expensive and not
configured for use with particular electrical devices. Also, these
components may only satisfy the requirements for a particular class
and division, and thus may not be used in other hazardous
environments or in hazardous environments under abnormal conditions
(i.e., Division 2 conditions). Further, these components may be
permanently coupled to the protected electrical device, restricting
the use of multiple electrical devices with the same enclosure.
Thus, there is a need in the art for an intrinsically safe or
explosion proof assembly and/or enclosure capable of being safely
used in varying types of conditions hazardous environments. Also,
it would be beneficial if such an enclosure was not permanently
coupled to or formed integrally with the protected electrical
device, allowing the use of different electrical devices with the
same enclosure.
[0010] It should be noted that standards differ depending on what
part of the world a user is in. It is desirous to have an explosion
proof assembly for a mobile device capable of meeting stringent
ATEX/IECEx (International Electrotechnical Commission) for zones 1
and 2, in addition to North America Class 1, Divisions 1 and 2 for
safe operation around hazardous gas, vapor and dust-based
atmospheres. This means any such assembly should be able to meet
the most difficult part of any specification, which may be
different by way of example each of ATEX, IECEx, and NA.
SUMMARY
[0011] Embodiments of the disclosure pertain to an explosion proof
enclosure that may include a first portion that may further have a
first portion rear face, a first portion outer edge, a first
portion inner edge, a second dissipation wall, an isolator housing
receptacle, a pin housing receptacle, and a window; an outer
touchscreen adhesively sealed around a perimeter of the first
portion rear face; a second portion releasably coupled to the first
portion, the second portion may further have a second portion inner
surface defined by a second portion inner edge that transitions
into a first dissipation wall, an isolator housing, and a pin
housing.
[0012] Other embodiments of the disclosure pertain to an explosion
proof assembly that may include a first portion releasably
coupleable to a second portion. The first portion may include any
of a first portion rear face, a first portion outer edge, a first
portion inner edge, a second dissipation wall, a pin housing
receptacle, and a window. There may be an outer touchscreen
adhesively sealed around a perimeter of the first portion rear
face. The second portion may include any of a second portion inner
face, a pin housing, and a second portion inner surface defined by
a second portion inner edge that transitions into a first
dissipation wall. The second portion may include a third
dissipation wall.
[0013] Coupling of the portions may form an enclosure. The first
portion and the second portion are releasably coupled to each other
to form the enclosure. There may be a mobile device within the
enclosure. The mobile device may be disposed between the window and
the second portion inner face. The mobile device may be operable
via a mobile device touchscreen.
[0014] The pin housing may mate within the pin housing receptacle.
Upon assembly the outer touchscreen may be engaged with the mobile
device touchscreen and/or the outer touchscreen may be transmissive
to the mobile device touchscreen.
[0015] In aspects, the second dissipation wall may be adjacent to
the first dissipation wall. The second dissipation wall may be
adjacent to the third dissipation wall. The second dissipation wall
may be adjacent to each of the first and third dissipation
walls.
[0016] The mobile device may have an on-off button. The pin housing
may include a movable pin. Upon assembly, the movable pin may be
aligned with the on-off button. In aspects, depressing of the
movable pin may results in depressing the on-off button.
[0017] The first portion may include a plurality of first mating
apertures. The second portion may include a plurality of second
mating apertures corresponding to the plurality of first mating
apertures. One or more of any respective first mating aperture and
second mating aperture may have a fastener disposed therein. Any
respective fastener may be tightened, such as to a torque value in
the range of about 3 Newton meter to about 7 Newton meter.
[0018] The mobile device may be configured for taking photos via a
camera lens. The second portion may include a lens window. Upon
assembly the camera lens and the lens window may be aligned.
[0019] The mobile device may be configured for taking photos via a
camera lens. The second portion may include a lens window. Upon
assembly the camera lens and the lens window may be aligned. The
mobile device may be configured for electromagnetic wireless
recharging functionality. The second portion may include a second
portion window sealingly closed off.
[0020] Upon coupling the assembly may be configured to at least
partially dissipate a flame resultant from an explosion of the
mobile device.
[0021] Other embodiments herein pertain to an explosion proof
enclosure having a mobile device therein, thereby forming an
assembly.
[0022] The enclosure may include a first portion having any of a
first portion rear face, a first portion outer edge, a first
portion inner edge, a second dissipation wall, a pin housing
receptacle, and a window. There may be an outer touchscreen
adhesively sealed around a perimeter of the first portion rear
face. The enclosure may include a second portion having nay of a
second portion inner face, a pin housing, a second portion inner
surface defined by a second portion inner edge that transitions
into a first dissipation wall, and a third dissipation wall.
[0023] The mobile device may be disposed between the window and the
second portion inner face. The mobile device may be operable via a
mobile device touchscreen. The first portion and the second portion
may be releasably coupled to each other to form an enclosure.
[0024] The second dissipation wall may be adjacent to the first
dissipation wall, and/or may be adjacent to the third dissipation
wall.
[0025] The mobile device may be configured for electromagnetic
wireless recharging functionality. The second portion may include a
second portion window sealingly closed off. Still other embodiments
of the disclosure pertain to an explosion proof assembly that may
include a first portion having any of a first portion rear face, a
first portion outer edge, a pin housing receptacle, a first portion
inner edge, a second dissipation wall, and a window. There may be
an outer touchscreen adhesively sealed around a perimeter of the
first portion rear face.
[0026] The second portion may be releasably coupled to the first
portion to form an enclosure. The second portion may include any of
a pin housing, a second portion inner surface defined by a second
portion inner edge that transitions into a first dissipation wall
extending substantially therearound, and a third dissipation wall.
There may be a mobile device disposed within the enclosure. The
mobile device may be operable via a mobile device touchscreen.
[0027] Upon coupling the assembly may be configured to at least
partially dissipate a flame resultant from an explosion of the
mobile device prior to any portion of the flame exiting the
assembly.
[0028] These and other embodiments, features and advantages will be
apparent in the following detailed description and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] A full understanding of embodiments disclosed herein is
obtained from the detailed description of the disclosure presented
herein below, and the accompanying drawings, which are given by way
of illustration only and are not intended to be limitative of the
present embodiments, and wherein:
[0030] FIG. 1A shows a front exploded or disassembled view of an
embodiment of an explosion proof tablet assembly according to
embodiments of the disclosure;
[0031] FIG. 1B shows a rear exploded or disassembled view of an
embodiment of an explosion proof tablet assembly according to
embodiments of the disclosure;
[0032] FIG. 2A shows a front view of the explosion proof tablet
assembly of FIG. 1A in an assembled configuration according to
embodiments of the disclosure;
[0033] FIG. 2B shows a back view of the explosion proof table
assembly of FIG. 1A in an assembled configuration according to
embodiments of the disclosure;
[0034] FIG. 3 shows a perspective view of an enclosure of the
assembly of FIG. 1A in an assembled configuration according to
embodiments of the disclosure;
[0035] FIG. 4 shows a front-side zoomed-in view of an enclosure of
the explosion proof table assembly of FIG. 1A according to
embodiments of the disclosure;
[0036] FIG. 5 shows a rear-side zoomed-in view of an enclosure of
the explosion proof table assembly of FIG. 1A according to
embodiments of the disclosure;
[0037] FIG. 6A shows a front-side exploded view of another
embodiment of an explosion proof tablet assembly according to
embodiments of the disclosure;
[0038] FIG. 6B shows a rear-side exploded view of another
embodiment of an explosion proof tablet assembly according to
embodiments of the disclosure;
[0039] FIG. 7 shows a zoomed-in view of an enclosure of the
explosion proof table assembly of FIGS. 6A and 6B according to
embodiments of the disclosure;
[0040] FIG. 8 shows a zoomed-in view of an enclosure of the
explosion proof table assembly of FIGS. 6A and 6B according to
embodiments of the disclosure;
[0041] FIG. 9 shows another embodiment of an explosion proof
enclosure according to embodiments of the disclosure;
[0042] FIG. 10A shows a frontward isometric view an explosion proof
assembly according to embodiments of the disclosure;
[0043] FIG. 10B shows a frontward isometric component breakout view
the assembly of FIG. 10 according to embodiments of the
disclosure;
[0044] FIG. 10C shows a rearward isometric component breakout view
of the assembly of FIG. 10 according to embodiments of the
disclosure;
[0045] FIG. 10D shows a side cross-sectional view of an unassembled
enclosure according to embodiments of the disclosure;
[0046] FIG. 10E shows a side cross-sectional view of an assembled
enclosure having a mobile device therein according to embodiments
of the disclosure;
[0047] FIG. 10F shows a side view of an input connector of a mobile
device accessible through an isolator bore of an explosion proof
assembly according to embodiments of the disclosure;
[0048] FIG. 11A shows a close-up cross-sectional view of a flame
path an assembled enclosure according to embodiments of the
disclosure;
[0049] FIG. 11B shows a close-up cross-sectional view of a flame in
the flame path of the assembled enclosure of FIG. 11A according to
embodiments of the disclosure;
[0050] FIG. 12 shows a back isometric component breakout view of an
explosion proof assembly having a modified second portion according
to embodiments of the disclosure;
[0051] FIG. 13A shows a top view of a hand-held accessory
releasably coupled to a rear side of an explosion proof assembly
according to embodiments of the disclosure;
[0052] FIG. 13B shows a top view of the hand-held accessory of FIG.
13A according to embodiments of the disclosure;
[0053] FIG. 13C shows a side profile view of a user holding the
explosion proof assembly of FIG. 13A according to embodiments of
the disclosure;
[0054] FIG. 14A shows a top view of a magnetic attachment accessory
releasably coupled to a rear side of an explosion proof assembly
according to embodiments of the disclosure; and
[0055] FIG. 14B shows a side profile view of a user using the
explosion proof assembly of FIG. 14A while magnetically attached to
a surface according to embodiments of the disclosure.
DETAILED DESCRIPTION
[0056] Herein disclosed are novel apparatuses, systems, and methods
that pertain to an explosion proof assembly, details of which are
described herein.
[0057] Embodiments of the present disclosure are described in
detail with reference to the accompanying Figures. In the following
discussion and in the claims, the terms "including" and
"comprising" are used in an open-ended fashion, such as to mean,
for example, "including, but not limited to . . . ". While the
disclosure may be described with reference to relevant apparatuses,
systems, and methods, it should be understood that the disclosure
is not limited to the specific embodiments shown or described.
Rather, one skilled in the art will appreciate that a variety of
configurations may be implemented in accordance with embodiments
herein.
[0058] Although not necessary, like elements in the various figures
may be denoted by like reference numerals for consistency and ease
of understanding. Numerous specific details are set forth in order
to provide a more thorough understanding of the disclosure;
however, it will be apparent to one of ordinary skill in the art
that the embodiments disclosed herein may be practiced without
these specific details. In other instances, well-known features
have not been described in detail to avoid unnecessarily
complicating the description. Directional terms, such as "above,"
"below," "upper," "lower," "front," "back," "right", "left",
"down", etc., are used for convenience and to refer to general
direction and/or orientation, and are only intended for
illustrative purposes only, and not to limit the disclosure.
[0059] Connection(s), couplings, or other forms of contact between
parts, components, and so forth may include conventional items,
such as lubricant, additional sealing materials, such as a gasket
between flanges, o-rings, PTFE between threads, and the like. The
make and manufacture of any particular component, subcomponent,
etc., may be as would be apparent to one of skill in the art, such
as molding, forming, machining, additive manufacturing, etc.
Embodiments of the disclosure provide for one or more components to
be new, used, and/or retrofitted to existing machines and systems.
One or more components may be made from a metallic material, such
as stainless steel, aluminum, metal alloy, etc.
[0060] The various characteristics mentioned above, as well as
other features and characteristics described in more detail below,
will be readily apparent to those skilled in the art upon reading
the following detailed description of the embodiments, and by
referring to the accompanying drawings.
Terms
[0061] The term "connected" as used herein can refer to a
connection between a respective component (or subcomponent) and
another component (or another subcomponent), which can be fixed,
movable, direct, indirect, and analogous to engaged, coupled,
disposed, etc., and can be by screw, nut/bolt, weld, and so forth.
Any use of any form of the terms "connect", "engage", "couple",
"attach", "mount", etc. or any other term describing an interaction
between elements is not meant to limit the interaction to direct
interaction between the elements and may also include indirect
interaction between the elements described.
[0062] The term "fluid" as used herein can refer to a liquid or gas
and is not solely related to any particular type of fluid such as
hydrocarbons.
[0063] The terms "pipe", "conduit", "line" or the like as used
herein can refer to any fluid transmission means, and can be
tubular in nature.
[0064] The term "combustion" as used herein can refer to an
exothermic reaction between a fuel and an oxidant that can result
in the production of a flame (the visible part of a fire) and a
gaseous product.
[0065] The term "explosion" as used herein can refer to a
combustion in the form of a release of energy in an extreme manner,
usually with the generation of high temperatures and the release of
gases. An explosion can produce a flame, heat, a shock wave, a
pressure wave, or other effects. An explosion can be referred to as
a form of combustion.
[0066] The term "flame" as used herein can refer to the visible
part of a fire. Flame can refer to a product of a combustion
reaction emitting visible, infrared, and sometimes ultraviolet
light, the frequency spectrum of which depends on the chemical
composition of the burning material and intermediate reaction
products.
[0067] The term "explosion proof assembly" as used herein can refer
to an assembly that can adequately prevent an explosion in an
environment external to the assembly as a result of an explosion or
ignited fire within the assembly.
[0068] The term "flame extinguishing enclosure" as used herein can
refer to an assemblable enclosure that upon proper coupling
together provides or otherwise configures the enclosure with a
flame path that is suitable to extinguish (or quench, etc.) a flame
that results from a combustion, explosion, or other form of ignited
fire from within the enclosure. The term can be further in
reference to accomplishing a desired configuration and result in
light of certain industry, standards, specifications, requirements,
etc. The term "flame dissipating" can be analogous to flame
extinguishing.
[0069] The term "flame path" as used herein can refer to a spatial
region of some amount of direction and/or distance (linear or
non-linear) within an explosion proof assembly where a flame may
traverse. The explosion proof assembly can be configured in a
manner to provide a suitable flame path that ultimately results in
the extinguishing of the flame before it (or any part thereof) can
leave or otherwise exit the assembly.
[0070] The term "transmissive" as used herein can refer to the
ability of a material to pass a signal therethrough. For example, a
touchscreen of an explosion proof assembly can be transmissive of a
signal created by human touch thereto to a touchscreen of a mobile
device retained within the assembly that is in contact with
therewith. This can occur, for example, by changing an electrical
property of both the touchscreens, such as resistance or
capacitance.
[0071] The term "CNC machined" can refer to a computer numerical
control (CNC) process whereby a robot or machinist runs
computer-operated equipment to create machine parts, tools and the
like.
[0072] The embodiments described herein include an explosion proof
assembly that includes a tablet computer having a touch screen,
such as the iPad.RTM. or iPhone produced by Apple, Inc.
Particularly, the explosion proof assembly includes a tablet
computer or phone disposed within a removably coupled enclosure.
The enclosure allows for the use of the tablet computer or phone in
hazardous areas including flammable vapors and ignitable dust,
corresponding to Class 1 Div2 Class II Div 2, Class 1 Div I, Class
2 Div I, Zone2, Zone22, Zone1 and Zone21 areas. Also, the enclosure
allows for the use of the tablet or phone in hazardous areas during
Zone/Division 1, 2 conditions. Further, the assembly is configured
to be non-incendive such that the assembly does not allow for the
release of any sparks or electrical/thermal energy sufficient to
cause ignition of hazardous substances in the surrounding
environment.
[0073] In an embodiment, a non-incentive, non-modified tablet
computer or phone (e.g., iPad2, iPad3, etc.) with an accompanying
enclosure is provided that allows a user to operate the tablet in
hazardous environments, including Class I/Division 2, Class
II/Division 2, Class I/Division 1, Class II/Division 1, ATEX Zone
2, Zone 1 and IECEx classified areas.
[0074] Referring initially to FIGS. 1A-1B, an explosion proof
assembly 10 is shown in an exploded or disassembled configuration
and generally includes a tablet computer or phone 100 and an
enclosure 200 having a first or upper portion 300 that is
releasably coupled to a second or lower portion 400. In this
embodiment, tablet 100 is an iPad.RTM. produced by Apple, Inc.
However, in other embodiments tablet 100 may comprise other varying
types and styles of tablet computers or phones, including but not
limited to those from other manufacturers. In this embodiment,
enclosure 200 is formed from milled aluminum satisfying the NEMA 4
standard.
[0075] However, in other embodiments enclosure 200 may be formed
from other rugged materials. Tablet 100 has a flat front face 101
defined by a front outer edge 103, which includes a touch screen
102. Tablet 100 also includes a flat rear face 105 that is defined
by a rear outer edge 107. Extending between front outer edge 103
and rear outer edge 107 is a chamfered surface 109 having four
chamfered corners 111. Tablet 100 also includes a first button 104
(home button) disposed on front face 101, a camera lens 106
disposed on rear face 105 and a second button 108 (on/off button)
disposed on chamfered edge 109. An input connector 110 is disposed
on chamfered surface 109. Input connector 110 is configured to
allow for data and/or electrical power transfer between tablet 100
and an external electrical device.
[0076] Referring now to FIGS. 1A-1B and 2A-2B, while FIGS. 1A-1B
show assembly 10 in an exploded or disassembled configuration,
FIGS. 2A-2B show assembly 10 in a closed or assembled configuration
where there is no wiring or other conductor exposed to the
surrounding environment. Regarding enclosure 200, first portion 300
includes a flat front face 301 having a central window 302
extending therethrough that is defined by an outer edge 303.
Extending from face 301 is a curved outer surface 305 that extends
around face 301. A first aperture 304 and a second aperture 306 are
also disposed on front face 301 and extend therethrough. Thus,
first aperture 304 provides a means for actuating first button 104
disposed on front face 101 of tablet 100. Also, second aperture 306
provides a window for a front cameral 12 (FIG. 2A) of tablet 100,
that may be disposed on front face 101 of tablet 100.
[0077] First portion 300 also includes a flat rear face 307 (FIG.
1B) disposed opposite of front face 301 and having a sealing
surface 308 that extends from face 307. Sealing surface 308 extends
between an outer edge 309 and the outer edge 303 of window 302.
Surface 308 is configured to sealingly engage the front face 101 of
tablet 100 so as to prevent or at least substantially restrict
fluids or particles (e.g., dust, particulates, fibers, etc.) from
entering or exiting enclosure 200 when assembly 10 is in its
assembled configuration (FIGS. 2A-2B). Sealing surface 308 also
includes a first portion 308a that extends about first aperture 304
and a second portion 308b that extends about second aperture 306.
Extending from curved surface 305 is a sealing mechanism 320, which
is configured to seal against a corresponding sealing assembly 420
of second portion 400 when first portion 300 and second portion 400
are coupled to each other.
[0078] Second portion 400 includes an inner flat face 401 defined
by a rectangular outer edge 402. Extending from edge 402 of face
401 is an inner chamfered surface 403 extending about inner face
401 and having four chamfered corners 405. Portion 400 also
includes a flat outer face 411 defined by an outer edge 404.
Extending from edge 404 is an outer chamfered surface 407 that
extends about outer face 411 and has four chamfered corners 409.
Sealing mechanism 420 is disposed between inner chamfered surface
403 and outer chamfered surface 407.
[0079] A ledge 408 extends from chamfered outer surface 407 and
includes an aperture 410, allowing access to actuate second button
108 of tablet 100. Referring briefly to FIG. 3, enclosure 200 in
the assembled configuration includes an internal chamber 440
disposed between first section 300 and second section 400. Sealing
assemblies 320, 420, and sealing surface 308 of portion 300 are
configured to seal internal chamber 440 from the external
environment once tablet 100 has been disposed in chamber 440, as
shown in FIGS. 2A-2B.
[0080] Referring now to FIGS. 4 and 5, sealing mechanism 320 of
first portion 300 includes an inner surface 321 that extends from
an outer edge 322 of curved surface 305. Mechanism 320 also
includes a tab 323 that extends inward (relative to second portion
400) from surface 321. Tab 323 includes four rounded corners 323a
and has a vertical inner surface 324 and an oppositely disposed
vertical outer surface 325. Correspondingly, sealing mechanism 420
of second portion 400 includes an inner surface 421 that extends
from an outer edge 422 of chamfered surface 407. Mechanism 420 also
includes a tab 423 that extends inward (relative to first portion
300) from surface 421. Tab 423 includes four rounded corners 423a
and has a vertical inner surface 424 and an oppositely disposed
vertical outer surface 425.
[0081] When assembly 10 is in the assembled configuration, as shown
in FIGS. 2A-2B, outer surface 325 of tab 323 is configured to
sealingly engage inner surface 424 of tab 423, thus preventing or
at least substantially restricting fluids or particles (e.g., dust,
particulates, fibers, etc.) from entering or exiting enclosure 200
when assembly 10 is in its assembled configuration. First portion
300 and second portion 400 may be releasably coupled to each other
by mechanical means, such as evenly distributed bolts or screws
extending through curved surface 305 of first portion 300 and
chamfered surface 407 of second portion 400. An adhesive or other
substance may also be disposed on either surface 321 of portion 300
or on surface 421 of portion 400, thus causing portions 300 and 400
to adhere to each other upon assemblage.
[0082] Referring now to FIGS. 6A and 6B, another embodiment
includes an explosion proof assembly 20 that generally includes
tablet 100 and an enclosure 500 having a first portion 600 and a
second portion 700. Enclosure 500 includes similar features as
enclosure 200 and thus identical features are numbered similarly.
In this embodiment, enclosure 500 is formed from milled aluminum
satisfying the NEMA 4 standard. However, in other embodiments
enclosure 500 may be formed from other rugged materials. As with
assembly 10, when assembly 20 is in the assembled configuration
there is no wiring or other conductor exposed to the surrounding
environment, as will be explained further herein. In this
embodiment, second portion 600 includes a data and/or recharging
interface 740 coupled to inner face 401 and outer face 411 of
portion 600.
[0083] Referring now to FIGS. 7 and 8, data interface 740 generally
includes a cable 742 having a first end 742a coupled to a first
connector 744 and a second terminal end 742b coupled to a second
connector 750. First connector 744 is a 30-pin dock connector
configured to electrically couple with input connector 110 of
tablet 100 (FIGS. 5A and 5B). Second connector 750 is a universal
serial bus (mini-USB) connection port having an opening 752
disposed on surface 411, which is coupled to second portion 400 by
two screws 751 extending into surface 401. Thus, when assembly 20
is in an assembled configuration (similar to the assembled
configuration of assembly 10 shown in FIGS. 2A-2B), connector 744
is coupled to input 110, establishing an electrical connection
between tablet 110 and USB port 750, which may be accessed by an
external cable. A dust cap 753 is disposed on surface 411 and is
coupled to surface 411 via a flange 754 and screw 755 that extends
through flange 754 and into surface 411 of portion 400. A cap
portion 756 is disposed directly over opening 752 to prevent dust,
fibers and other matter from contacting any pins or other
electrical connectors within opening 752 of port 750. In order to
access opening 752 of port 750, cap 753 may be rotated about screw
755, such as to expose opening 752 to allow for the insertion of a
male connector (FIG. 7 shows cap 753 in the covered position).
[0084] Referring now to FIG. 9, another embodiment includes an
enclosure 250 configured for use in an explosion proof assembly
(e.g., assembly 10). Enclosure 250 includes similar features as
enclosure 200 and thus identical numerals are numbered similarly.
Enclosure 250 includes a first portion 350 and a second portion
450, where portions 350 and 450 are configured to releasably couple
to each other via a plurality of screws 454 Inner surface 321 of
first portion 350 and chamfered surface 407 of second portion 450
each include an evenly distributed plurality of apertures 352, 452,
respectively, for receiving the plurality of screws 454.
[0085] Referring to FIGS. 1-5, a method of forming explosion proof
assembly 10 generally includes placing or disposing tablet 100
within the second portion 400 of enclosure 200 and sealing tablet
100 within enclosure 200 by coupling first portion 300 with second
portion 400. Once coupled, assembly 10 is in the assembled
configuration such that assembly 10 satisfies the requirements of
Class I, Division 2 and Class II, Division 2 hazardous area
classifications. Also, touch screen 102 of tablet 100 may be safely
actuated within Class I, Division 2 and Class II, Division 2
hazardous areas without violating the safety requirements of these
areas. In other words, the assembly 10 includes an explosion-proof
sealing or compartment for the enclosed tablet.
[0086] In the embodiment of FIGS. 1-5, placing tablet 100 within
second portion 400 includes disposing tablet 100 such that the flat
rear face 105 of tablet 100 is aligned with and/or engages the
inner flat face 401 of second portion 401 of second portion 400.
Also, chamfered surface 109 and corners 111 of tablet 100 are
aligned with and/or engage chamfered surface 403 and corners 405 of
portion 400. Coupling first portion 300 with second portion 400 of
enclosure 200 includes aligning and engaging the sealing mechanism
320 of portion 300 with the sealing mechanism 420 of second portion
400, such that inner surface 321 engages inner surface 421 and
outer surface 325 of tab 323 engages surface 424 of tab 423.
[0087] In the embodiment shown in FIG. 9, coupling the first
portion 300 to the second portion 400 further includes extending
the plurality of screws 454 through the plurality of apertures 352
and 452. However, in other embodiments coupling portions 300 and
400 may include disposing an adhesive on one or more of the
surfaces of either sealing mechanism 320, 420, respectively. In
this embodiment, engagement between mechanisms 320 and 420 of
enclosure 200 creates a seal satisfying the IP67 standard. However,
in other embodiments the seal may satisfy other standards such as
IP68 or IP65, etc. In some embodiments, an explosion-proof sealing
or compartment is provided thereby.
[0088] Referring now to FIGS. 6A-8, a method of forming explosion
proof assembly 20 generally includes placing or disposing tablet
100 within the second portion 700 of enclosure 500 and sealing
tablet within enclosure 500 by coupling first portion 600 with
second portion 700. As with assembly 10, once coupled assembly 20
is in the assembled configuration and thus satisfies the
requirements of Class I, Division 2 and Class II, Division 2
hazardous area classifications. Also, touch screen 102 of tablet
100 may be safely actuated within Class I, Division 2 and Class II,
Division 2 hazardous areas without violating the safety
requirements of these areas. Tablet 100 is disposed within portion
700 in a similar fashion to how tablet 100 is disposed within
portion 400. However, in the embodiment of assembly 20, disposing
tablet 100 within portion 700 further includes coupling connector
110 of tablet 100 with interface 740 of portion 700. Specifically,
coupling connector 110 with interface 740 includes coupling
connector 110 with first connector 744 of interface 740. Once
coupled, an electrical signal may be communicated between tablet
100 and port 750.
[0089] As with enclosure 200 of assembly 10, portions 600 and 700
of assembly 20 are coupled in a similar fashion as portions 300 and
400 are coupled to form assembly 10 (e.g., sealing mechanisms 320,
420, respectively, of portions 600 and 700 are engaged with each
other). Portions 600 and 700 may also be coupled via a plurality of
screws (e.g., screws 454) that extend through apertures (e.g.,
apertures 352, 452) disposed in portions 600 and 700. In this
embodiment, engagement between mechanisms 320 and 420 of enclosure
500 creates a seal satisfying the IP65 standard. However, in other
embodiments the seal may satisfy other standards such as IP68 or
IP65, etc.
[0090] Once assembly 20 is in the assembled configuration an
electrical signal may be communicated between an external
electrical device and tablet 100. A method for communicating a
signal between an external device and tablet 100 includes rotating
cap portion 756 of dust cap 753 about screw 755 such that opening
752 is exposed. Once opening 752 is exposed, a connector of the
external device or conduit is coupled to port 750 of interface 740
such that an electrical signal may be communicated between tablet
100 and the external device or conduit. In this manner, tablet 100
may be safely recharged within enclosure 500 while assembly 20 is
in a hazardous area (e.g., Class I, Division 2 and Class II,
Division 2 areas).
[0091] Referring now to FIGS. 10A, 10B, 10C, 10D, 10E, and 10F
together, a front isometric assembled view, a front isometric
component breakout view, a back isometric component breakout view,
an unassembled lateral cross-sectional view, an assembled lateral
cross-sectional view, and a side view of an accessible input
connector of a mobile device, respectively, of an explosion proof
assembly, in accordance with embodiments disclosed herein, are
shown.
[0092] As illustrated, explosion proof assembly 1000 may include a
mobile device 1100 associated with a flame extinguishing enclosure
1200. The enclosure 1200 may include a first or upper portion 1300
configured for releasable coupling to a second or lower portion
1400. In aspects, the mobile device 1100 may be an iPad.RTM. or
iPhone.RTM. produced by Apple, Inc., including the recent iPhone 8.
However, the mobile device 1100 is not meant to be limited, and
include other varying types and styles of computer-related devices,
including but not limited to those from other manufacturers.
[0093] Embodiments herein provide for an explosion proof assembly
1000 configured to pass a `resistance to impact` test in accordance
with IEC 60079-0 (see Section 26.4.2 describing a drop-ball test).
In the drop-ball test, an object, usually a ball of 1 kg mass, is
dropped from a range of 0.2 m to 0.4 m. Accordingly, outer
touchscreen 1302 must be configured to withstand the impact of the
dropped ball without effecting the ability of assembly 1000 to be
`explosion proof`.
[0094] "Explosion proof" as referenced to the assembly 1000 may
refer to the enclosure 1200, when assembled, being able to contain
any explosion originating therein. The enclosure 1200, when
assembled, may be configured and able to completely extinguish a
flame generated from therein, such as from an explosion or other
similar failure of mobile device 1100.
[0095] Enclosure 1200 may be formed from milled aluminum satisfying
the NEMA 4 standard. However, in other embodiments enclosure 1200
may be formed from other rugged materials. Of significance, the
explosion proof assembly 1000 may be configured for use in
hazardous areas, including: North America Class I, Division 1;
Class I, Division 2; Class II, Division 2 areas; and Class II,
Division 1, and non-US Zone 2 and 1 ATEX and IECEx classified
areas. As would be apparent to one of skill in the art, in order to
certified by these bodies for satisfactory use within such a
setting, various requirements must be met.
[0096] Standards pertain to impact, dropping, thermal conditioning
(or endurance), thermal shock, temperature requirements, explosive
pressure, overpressure, torque test, and so forth.
[0097] FIGS. 10B and 10C together show assembly 1000 in a breakout
view, while FIG. 10A shows assembly 1000 in a closed or assembled
configuration where there is no wiring or other conductor exposed
to the surrounding environment. When assembled the assembly 1000
may be configured for use in Class I, Division 1; Class I, Division
2; Class II, Division 2 areas; and Class II, Division 1, and non-US
Zone 2 and 1 ATEX and IECEx classified areas.
[0098] The assembly 1000 may be configured for use in the setting
when the upper portion 1300 is sealingly coupled with the lowered
portion 1400, with the mobile device 1100 disposed therein.
`Sealingly coupled` may include the portions 1300, 1400 being
sealingly engaged to certain specification, but some amount of
disconnect is permissible. In this sense `sealing` may refer to a
metal-to-metal seal.
[0099] Regarding the enclosure 1200, the first portion 1300 may
include a front face 1301. The first portion 1300 may include a
rear face 1307 disposed opposite of front face 1301. The rear face
1307 may provide a suitable surface for sealing between the rear
face 1307 and an outer touchscreen 1302. The surface for sealing
may extend between an inner edge 1303 and a rear face inner edge
1303a, and therearound the rear face 1307. As would be apparent the
first portion 1300 may thus have its `window` (or opening) closed
off by the presence of the outer touchscreen 1302.
[0100] The outer touchscreen 1302 may be a thin, flat piece of
rigid and durable material suitable to meet various specifications
identified herein. One of skill in the art would appreciate the
outer touchscreen 1302 may be configured to withstand the
aforementioned drop-ball test. Accordingly, the outer touchscreen
1302 may have a thickness T1 in the range of about 0.5 mm to about
1.2 mm. The thickness T1 may depend on the size of the touchscreen
1302, which may further depend on the particular mobile device
desired for use.
[0101] The second portion 1400 may include a second portion inner
face 1401. The inner face 1401 may be bordered by a second portion
outer edge 1402. There may be an inner chamfered surface 1403
extending around the outer edge 1402. The inner surfaces of the
second portion 1400 may be machined in a manner to accommodate to
specification a particular mobile device. In this respect,
chamfered or rounded surfaces may instead be linear.
[0102] The second portion 1400 may include a second portion rear
outer face 1411. The rear outer face 1411 may be generally flat.
The second portion 1400 may include one or more chamfered corners
1405, which may be configured to coincide with any respective
chamfered corners of the first portion 1300 (as well as chamfered
corners 1011 of the mobile device 1100).
[0103] The outer touchscreen 1302 may have a planar underside 1302a
configured for complete transmissive mating and engagement with the
touchscreen 1002 via contact point (or interface, layer, etc.)
1503. In this respect the assembly 1000 may provide the synergistic
effect of being able to isolate effects of any internal explosion
from the surrounding environment, and yet a user can still access
and operate the touchscreen interface (and buttons 1004, 1008) of
the mobile device 1100. One of skill would appreciate the contact
point 1503 may be refer to a suitable amount of contact between the
surface of the touchscreen 1002 and the outer touchscreen 1302,
whereby the mobile device is accessibly operable via interfacing
with the outer touchscreen.
[0104] The front face 1301 may have an outer perimeter surface edge
1309 that may extend at around the face 1301 and to the rear face
1307.
[0105] Referring particularly to the enclosure 1200 as shown in
FIGS. 10C and 10D, the first portion 1300 may include the front
face 1301, and the rear face 1307 disposed opposite of the front
face 1301. The rear face 1307 may provide a suitable surface for
sealing between the rear face 1307 and the outer touchscreen 1302.
The surface for sealing may extend between an inner edge 1303 and
the rear face inner edge 1303a, and therearound the rear face
1307.
[0106] As illustrated, the outer touchscreen 1302 may be adhesively
and sealingly connected with the first portion 1300, such as via a
layer of an adhesive 1500. The layer of adhesive 1500 may provide
for a complete perimeter seal between the outer touchscreen 1302
and the first portion 1300. The adhesive may be suitable to
withstand changes of significance in temperature, or chemicals,
both from internal and external to the enclosure 1200.
[0107] The sealing engagement between the outer touchscreen 1302
and the first portion 1300 may be beneficial to so as to prevent or
at least substantially restrict fluids or particles (e.g., dust,
particulates, fibers, etc.) from entering or exiting the enclosure
1200 when the assembly 1000 is in its assembled configuration
(e.g., FIG. 10A).
[0108] The second portion 1400 may include a second portion inner
face 1401. The inner face 1401 may be bordered by a second portion
outer edge 1402. There may be an inner chamfered surface 1403
extending around the outer edge 1402.
[0109] The second portion 1400 may include a second portion rear
outer face 1411. The rear outer face 1411 may be generally flat.
The inner face 1401 may trail off into a surface forming the first
dissipation wall 1417, which may extend outward and upward from
edge 1402, including in an arcuate manner, into proximate
engagement with the outer touchscreen 1302. As shown, the first
dissipation wall 1417 may be the first (lateral) contact point of
any flame resulting from failure of the mobile device 1100.
[0110] The first portion 1300 may similarly have a second
dissipation wall 1317. In the event of any remnant flame moving
past the first dissipation wall 1417, the flame will be resisted
from passing any further beyond the second dissipation wall 1317.
As a further measure of added redundancy, the second portion may
have a third dissipation wall 1418. One of skill would appreciate
the first portion 1300 may have a grooved surface or region to
accommodate mating with the first dissipation wall 1417 and the
third dissipation wall 1418. And similarly the second portion 1400
may have a grooved surface or region to accommodate mating with the
second dissipation wall 1318.
[0111] Referring again to FIGS. 10A-10F together, the surface edge
1309 of the first portion 1300 may be flat, planar, rounded, or any
suitable shape, and is not meant to be limited. The surface edge
1309 may have one or more bumper mating holes 1313, whereby a
respective bumper 1012 may be coupled therewith (via bumper
couplers 1013, which may be screws). Accordingly, one or more
bumpers 1012 (only one shown here) may be coupled to the enclosure
1200.
[0112] The bumper 1012 may be of a material suitable for providing
extra protection to the mobile device 1100, particularly for shock
absorption in the case of inadvertent dropping of the assembly
1000. Although not limited, the bumper 1012 may be made of rubber,
plastic, silicone, or other comparable material. Moreover, although
the Figures may illustrate one or more corner bumpers, the bumper
1012 could have other shapes, including being disposed around the
entire perimeter (or in addition or alternatively to other
portions) of the assembled enclosure 1200.
[0113] Of significance, the mating faces--namely rear face 1307
(including respective undulations, edges, and so forth) and inner
surfaces 1401, 1402, 1403 (including respective undulations, edges,
and so forth)--may be configured for sealing engagement
therebetween. The sealing engagement may be metal-to-metal. In
order to facilitate the flame extinguishing characteristic of the
enclosure 1200, it is desirous to have significantly reduced
separation between the corresponding mating surfaces of the first
portion 1300 and the second portion 1400.
[0114] Any or both of the first portion 1300 and the second portion
1400 may be made from CNC machining.
[0115] In this respect, when the first portion 1300 and the second
portion 1400 are coupled together, the distance between any
respective and proximate surface of the portions 1300, 1400 may be
less than about 0.05 inches. In aspects, the gap at any particular
proximate contact point may be in the range of about 0.01 inches to
about 0.05 inches. The use of an extremely tight or close tolerance
seal around the portions 1300, 1400 is of significance in meeting
specification for a certified explosion proof assembly.
[0116] The first portion 1300 may have one or more first mating
apertures 1310. The first mating apertures 1310 may be configured
for receiving respective fasteners 1511. In aspects, the fasteners
1511 may be screw-type fasteners. As a non-limiting example, the
fasteners 1511 may be A2 Stainless M5.times.0.8.times.8 mm Torx
head screws. The fasteners 1511 may be insertable through
respective second portion apertures 1408. Although shown as being
insertable through the second portion 1400 and threadingly into
apertures of the first portion 1300, this configuration could just
as well be reversed.
[0117] Although not limited to any particular arrangement or
number, there may be sufficient placement and use of fasteners 1511
to promote or otherwise contribute to the desired tolerance fit
between the first portion 1300 and the second portion 1400. The
fasteners 1511 may be tightened to a fastener torque value in the
range of about 3 Nm to about 8 Nm. In aspects, the fastener torque
value may be at least 5 Nm. The fastener torque value may be in the
range of about 5 Nm to about 6 Nm.
[0118] Mobile device 1100 may have a front face 1001 that may
further include a front outer edge 1003, as well as an operable
touch screen 1002. The mobile device 1100 may include a rear face
1005 that may be defined by a rear outer edge 1007. There may be a
chamfered surface or edge 1009, which may extend between the outer
edge 1003 and the rear outer edge 1007. In aspects, there may be
one or more chamfered corners 1011.
[0119] The mobile device 1100 may include a first button 1004
(which may be a `home` button or switch as would be understood by
one of skill in the art) disposed on the front face 1001. There may
be other buttons that provide various functionality based on user
interaction, such as and a second button 1008 (which may be an
`on/off` button or switch as would be understood by one of skill in
the art). The second button 1008 may be disposed on chamfered
surface 1009. In accordance with embodiments herein the first
button 1004 and the second button 1008 may be completely accessible
and actuatable when the portions 1300, 1400 are coupled
together.
[0120] The mobile device 1100 may include a camera lens 1006
(associated with respective camera circuitry), which may be
disposed on the rear face 1005. In accordance with embodiments
herein the camera function of the mobile device 1100, including
being able to take pictures via lens 1006, may be completely
accessible and actuatable when the portions 1300, 1400 are coupled
together. The lens 1006 may align with outer lens window 1406. The
outer lens window may be configured to meet or exceed specification
for the explosion proof assembly 1000.
[0121] The mobile device 1100 may include an input connector 1010.
The input connector 1010 may be configured to allow for data and/or
electrical power transfer between mobile device 1100 and any
external electrical device, such as a power charger (including
respective cord and connector--not shown here). In accordance with
embodiments herein the input connector 1010 may be completely
isolated from the external environment of the assembly 1000 when
the portions 1300, 1400 are coupled together. Still, the input
connector 1010 may be completely accessible when the portions 1300,
1400 are coupled together.
[0122] The difference in isolation or accessibility to the input
connector 1010 may be as a result of the presence of an isolator
member 1513. In this respect the assembled enclosure 1200 may
provide the ability for a user to gain access to the input
connector 1010 without having to resort to disassembly. Although
not meant to be limited to any particular type of isolation/access
configuration, the Figures show the lower portion 1400 may have a
generally block- or cubical-shaped isolator housing 1414, with an
isolator bore 1415.
[0123] The housing 1414 may be configured for mating into a housing
receptacle 1313 formed in the first portion 1300. The isolator bore
1415 may be configured with threads for a threaded engagement with
respective threads of the isolator member 1513. In embodiments, the
isolator member 1513 may be a screw.
[0124] The threaded engagement may have a suitable tolerance for
sufficient prevention of a flame traveling therethrough. In
embodiments, the isolator member 1513 may be tightened within the
bore 1415 to a torque value in the range of about 15 Newton Meters
("Nm") to about 25 Nm. The torque value may be at least 20 Nm. The
isolator member 1513 may have a raised head configured for easy
tool access, such as via wrench, allen wrench, or other type of
feature suitable for a tool to provide the requisite torque value
to the tightened isolator member 1513. In other embodiments, the
enclosure 1200 may have a non-torque configuration. For example,
the isolator member 1513 may be self-locking.
[0125] There may be a gasket 1514 and a gasket plate 1515
configured to provide sealing engagement with the enclosure 1200 in
the proximity of the housing 1414 and the receptacle 1313. This
configuration may be able to further prevent or at least
substantially restrict fluids or particles (e.g., dust,
particulates, fibers, etc.) from entering or exiting enclosure 1200
via bore 1415 when the enclosure 1200 is assembled. For convenience
there may be a retention member 1516 configured to retain the
isolator member 1513 with the assembly 1000. The retention member
1516 may be a chain link having one end connected to the isolator
member 1513, and an other end connected to part of the assembly
1000, such as the second portion 1400 or the gasket plate 1515.
There may be a washer 1517 for sealing between the head 1513a and
the gasket plate 1515. The gasket plate 1515 may be coupled to the
enclosure 1200 via one or more gasket fasteners 1518 inserted into
respective gasket fastener apertures 1519. In aspects, the gasket
fasteners 1518 may be threadingly engaged into the apertures
1519.
[0126] One of skill would appreciate that enclosure 1200 could be
configured to swap the housing 1414 into the first portion 1300,
and the receptacle 1313 into the second portion 1400.
[0127] In accordance with embodiments herein the second button 1008
may be completely isolated from the external environment of the
assembly 1000 when the portions 1300, 1400 are coupled together.
Still, the second button 1008 may be completely accessible when the
portions 1300, 1400 are coupled together.
[0128] The difference in isolation but yet accessibility to the
second button 1008 may be as a result of the presence of a sealed
depressible pin 1407. The pin 1407 may be biased, such as via
spring or other suitable manner, whereby when a top 1407a of the
pin 1407 is depressed, it will subsequently depress a bottom 1407b
of the pin 1407 against the second button 1008; however, when the
pin 1407 is released, the pin 1407 releases from depression of the
second button 1008.
[0129] The pin 1407 may be sealingly disposed within a pin bore
1409. In this respect the assembled enclosure 1200 may provide the
ability for a user to gain access to or otherwise actuate the
second button 1008 without having to resort to disassembly, and
still maintain desired isolation from the surrounding environment.
Although not meant to be limited to any particular type of
isolation/access configuration, the Figures show the second portion
1400 may have a generally block- or cubical-shaped pin housing
1416, with the pin bore 1409.
[0130] The pin housing 1416 may be configured for mating into a pin
housing receptacle 1312 formed in the first portion 1300. One of
skill would appreciate that enclosure 1200 could be configured to
swap the pin housing 1416 into the first portion 1300, and the pin
housing receptacle 1312 into the second portion 1400. If an
explosion occurs within the enclosure 1200, the pin 1407 may will
be pushed (urged) against pin housing 1416 to prevent any flame to
pass through 1416.
[0131] Referring now to FIGS. 11A and 11B together, a zoom-in
cross-sectional view of a flame path, and a zoom-in cross-sectional
view of a flame path with a flame therein, of an explosion proof
assembly, in accordance with embodiments disclosed herein, are
shown.
[0132] As should be readily apparent, FIGS. 11A and 11B may not be
to scale. Instead, the Figures are intended to illustrate that upon
zoom-in inspection, various passageways, gaps, and interstices may
be present when the enclosure 1200 is assembled together (i.e.,
first portion 1300 and second portion 1400 are coupled together).
For example, there may be a gap 1512 having a distance of less than
about 0.04 inches (.about.1000 microns) between various contact
points of the first portion 1300 and the second portion 1400.
[0133] Although theoretically this could result in passage of, for
example, gaseous material, air, and so forth, one of the key
attributes of the assembled enclosure 1200 is the ability to
dissipate a flame.
[0134] Regarding the enclosure 1200, the first portion 1300 may
include a front face 1301. The first portion 1300 may include a
rear face 1307 disposed opposite of front face 1301. The rear face
1307 may provide a suitable surface for sealing between the rear
face 1307 and an outer touchscreen 1302. The surface for sealing
may extend between an inner edge 1303 and a rear face inner edge
1303a, and therearound the rear face 1307.
[0135] The outer touchscreen 1302 may be adhesively and sealingly
connected with the first portion 1300, such as via a layer of an
adhesive 1500. The layer of adhesive 1500 may provide for a
complete perimeter seal between the outer touchscreen 1302 and the
first portion 1300. The adhesive may be suitable to withstand
changes of significance in temperature, or chemicals, both from
internal and external to the enclosure 1200.
[0136] The sealing engagement between the outer touchscreen 1302
and the first portion 1300 may be beneficial to so as to prevent or
at least substantially restrict fluids or particles (e.g., dust,
particulates, fibers, etc.) from entering or exiting the enclosure
1200 when the assembly 1000 is in its assembled configuration
(e.g., FIG. 10A). The sealing may further prevent any flame path
between portion 1300 and the outer touchscreen 1302.
[0137] The second portion 1400 may include a second portion inner
face 1401. The inner face 1401 may be bordered by a second portion
outer edge. There may be an inner chamfered surface 1403 extending
around the outer edge.
[0138] The second portion 1400 may include a second portion rear
outer face 1411. The rear outer face 1411 may be generally flat.
The inner face 1401 may trail off into a surface forming the first
dissipation wall 1417, which may extend outward and upward from
edge 1402, including in an arcuate manner, into proximate
engagement with the outer touchscreen 1302. As shown, the first
dissipation wall 1417 may be the first (lateral) contact point of
any flame resulting from failure of the mobile device 1100.
[0139] The first portion 1300 may similarly have a second
dissipation wall 1317. In the event of any remnant flame moving
past the first dissipation wall 1417, the flame will be resisted
from passing any further beyond the second dissipation wall 1317.
Still, as a further measure of added redundancy, the second portion
may have a third dissipation wall 1418. One of skill would
appreciate the first portion 1300 may have a grooved surface or
region to accommodate mating with the first dissipation wall 1417
and the third dissipation wall 1418. And similarly the second
portion 1400 may have a grooved surface or region to accommodate
mating with the second dissipation wall 1318. To the naked eye the
first portion 1300 and second portion 1400 may fit seamlessly
together.
[0140] Referring specifically to FIG. 11B, the first portion 1300
and the second portion 1400 may be configured for assembly together
whereby a flame extinguishing (or quenching) path 1509 may be
formed. The extinguishing path 1509 may be likened to a path of
least resistance. That is, in the event of an explosion within the
enclosure 1200, the resultant flame 1510 travels therein. Like any
joint, where the first portion 1300 and second 1400 are coupled
together may be the path of flame travel.
[0141] To meet various standards, such as the more stringent
requirements for Class 1 Div I or Zone 1, the enclosure 1200 is
required to be able to withstand the effects of an internal
combustion or explosion that may produce a flame, which could in
turn be an ignition source for various materials that may be
associated with the Class 1 Div I or Zone 1.
[0142] It has been discovered that the flame 1510 (or its energy)
may be extinguished or otherwise dissipated by the presence of one
or more flame barriers or dissipation walls 1417, 1317, 1418.
[0143] Referring now to FIG. 12, a back isometric component
breakout view of an explosion proof assembly having a modified
second portion, in accordance with embodiments disclosed herein, in
shown.
[0144] While it need not be exactly the same, an assembly 2000 may
be like that of assembly of FIGS. 10A-10F, and components thereof
may be duplicate or analogous. Thus, only a brief discussion of the
assembly 2000 is provided, recognizing that differences, if any,
would be discernable by one of skill in the art, especially in view
of the present disclosure.
[0145] As illustrated, explosion proof assembly 2000 may include a
mobile device 2100 associated with a flame extinguishing enclosure
2200. The enclosure 2200 may include a first or upper portion 2300
configured for releasable coupling to a second or lower portion
2400. In aspects, the mobile device 2100 may be an iPad.RTM. or
iPhone.RTM. produced by Apple, Inc., including the recent iPhone 8.
However, the mobile device 2100 is not meant to be limited, and
include other varying types and styles of computer-related devices,
including but not limited to those from other manufacturers.
[0146] In the case of the new iPhone 8, and comparable, the
enclosure 2200 may include a rear window 2318. The use of the rear
window 2318 may aid to prevent or mitigate interference with any
electromagnetic "wireless" recharging functionality of the mobile
device 2100. Accordingly, the second portion 2400 may have an
opening 2419 configured to receive the rear window 2318.
[0147] The assembly 2000 may be configured for use in the setting
when the upper portion 2300 is sealingly coupled with the lowered
portion 2400, with the mobile device 2100 disposed therein.
`Sealingly coupled` may include the portions 2300, 2400 being
sealingly engaged to certain specification, but some amount of
disconnect is permissible. In this sense `sealing` may refer to a
metal-to-metal seal.
[0148] Although not limited, the rear window 2318 may be adhesively
and sealingly connected with the second portion 2400, such as via a
layer of an adhesive (not viewable here). The layer of adhesive may
provide for a complete perimeter seal between the rear window 2318
and the second portion 2400. The adhesive may be suitable to
withstand changes of significance in temperature, or chemicals,
both from internal and external to the enclosure 2200.
[0149] Referring now to FIGS. 13A, 13B, and 13C together, a top
view of a hand-held accessory releasably coupled to a rear side of
an explosion proof assembly, a top view of the hand-held accessory
of FIG. 13A, and a side view of a user holding the explosion proof
assembly of FIG. 13A, respectively, in accordance with embodiments
disclosed herein, are shown.
[0150] While it need not be exactly the same, an assembly 3000 may
be like that of assembly of FIGS. 10A-10F, 12, etc., and components
thereof may be duplicate or analogous. Thus, only a brief
discussion of the assembly 3000 is provided, recognizing that
differences, if any, would be discernable by one of skill in the
art, especially in view of the present disclosure.
[0151] As illustrated, explosion proof assembly 3000 may include a
mobile device (not shown here) associated with a flame
extinguishing enclosure 3200. The enclosure 3200 may include a
first or upper portion 3300 configured for releasable coupling to a
second or lower portion 3400. In aspects, the mobile device 2100
may be an iPad.RTM. or iPhone.RTM. produced by Apple, Inc.,
[0152] The assembly 3000 may be configured for use in the setting
when the upper portion 3300 is sealingly coupled with the lowered
portion 3400, with the mobile device disposed therein. `Sealingly
coupled` may include the portions 3300, 3400 being sealingly
engaged to certain specification, but some amount of disconnect is
permissible. In this sense `sealing` may refer to a metal-to-metal
seal.
[0153] To aid in use of the assembly 3000, various accessories may
be utilized, including those that provide additional grip, shock
absorption, hand-holding, and the like. As shown in FIGS. 13A-13C,
an attachable hand-holding accessory 3520 may be coupled to the
assembly, such as to the rear side 3411 of the second portion
3400.
[0154] Although not limited to any particular hand-holding
accessory configuration (and material selection thereof), the
accessory 3520 may be made of a nylon-based material.
[0155] The accessory 3520 may have an attachment backing 3521,
which may be of minimal thickness and generally polygonal in shape.
The backing 3521 may be configured for releasable attachment to the
rear face 3411. In this respect, the backing 3521 may have one or
more apertures (not viewable here) for receiving a respective
attachment fastener 3528 therethrough. As shown, there may be a
fastener 3528 inserted through four corner apertures. Accordingly,
the second portion 3400 may also have receptacles (not viewable
here) that align with the apertures, to which the fastener 3528 may
be securely positioned therein. In aspects, the fasteners 3528 may
be screwed into the second portion 3400.
[0156] It may be desirous to attach and detach the accessory 3520
without having the jeopardize the integrity of the assembled
enclosure 3200. Thus, the receptacles need not have a depth that
extends all the way through the thickness of the second portion
3400. Accordingly, the second portion 3400 may have various raised
faces 3530 to accommodate and appreciable amount of material depth
to which the fastener 3528 may extend.
[0157] In other aspects, it may be desirous to disassemble the
enclosure 3200 without removing the accessory 3520. Thus, the
accessory 3520 may be shaped in a manner to provide access to
enclosure fasteners 3511. As shown, the accessory 3520 may have one
or more arcuate segments 3527.
[0158] The accessory 3520 may have a hand hold strap 3522. The
strap 3522 may be movably, yet fixedly connected at strap
attachment point 3525. While not meant to be limited to any
particular hand hold configuration, the hand hold strap 3522 may be
of sufficient length for inserting into an eyelet 3524, and then
wrapping back over for self-securing to itself, such as via a
Velcro layer (e.g., a mini-hook/loop) 3526. The layer 3526 may be
of suitable size to provide adjustment for accommodation of hands
of various sizes, as would be apparent to one of skill in the
art.
[0159] As shown in FIG. 13C, a user 3532 can slide his/her hand
into the hand-insertion region 3523. Using the hand on the back of
the enclosure 3520 may provide extra stability as the user 3532
interfaces with the mobile device via outer touchscreen 3302.
[0160] For further convenience, a carrying handle 3530 may be
coupled to the enclosure 3200. As illustrated in FIG. 13A, the
handle 3530 may be coupled to the second portion 3400 via handle
couplers 3529 on each side of the handle.
[0161] Referring now to FIGS. 14A and 14B together, a top view of a
magnetic attachment accessory releasably coupled to a rear side of
an explosion proof assembly and a side view of a user using the
explosion proof assembly of FIG. 14B while magnetically attached to
a surface, respectively, in accordance with embodiments disclosed
herein, are shown.
[0162] While it need not be exactly the same, an assembly 4000 may
be like that of any assembly disclosed herein, and components
thereof may be duplicate or analogous. Thus, only a brief
discussion of the assembly 4000 is provided, recognizing that
differences, if any, would be discernable by one of skill in the
art, especially in view of the present disclosure.
[0163] As illustrated, explosion proof assembly 4000 may include a
mobile device (not shown here) associated with a flame
extinguishing enclosure 4200. The enclosure 4200 may include a
first or upper portion 4300 configured for releasable coupling to a
second or lower portion 4400.
[0164] To aid in use of the assembly 4000, various accessories may
be utilized, including those that provide additional grip, shock
absorption, hand-holding, and the like. As shown in FIGS. 14A-14B,
magnetic attachment accessory 4520 may be coupled to the assembly,
such as to the rear side 4411 of the second portion 4400.
[0165] Although not limited to any particular accessory
configuration (and material selection thereof), the accessory 4520
may include various magnetic and non-magnetic components coupled
together. As shown in the Figures, the accessory 4520 may include
at least on non-magnetic support bar 4532 coupled to raised faces
4531. The support bar 4532 may have a generally rectangular prism
shape
[0166] The backing support bar(s) 4532 may be configured for
releasable attachment to the rear face 4411. In this respect, the
support bar 4532 may have one or more apertures (partially viewable
here) for receiving a respective attachment fastener 4528
therethrough. As shown, there may be a fastener 4528 inserted
through apertures on each end of the support bar 4532. Accordingly,
the second portion 4400 may also have receptacles (not viewable
here) that align with the apertures, to which the fastener 4528 may
be securely positioned therein. In aspects, the fasteners 4528 may
be screwed into the second portion 4400.
[0167] Although a magnet 4544 may be directly coupled to the rear
face 4411, the Figures show the magnet 4544 coupled onto the
support bar 4532. In aspects, there may be a first magnet on one
end of the support bar 4532, and a second magnet disposed on the
opposite end of the support bar. An other side of second portion
4400 may have a similar support bar/magnet configuration (e.g., a
support bar 4532 on each side, and a magnet on each end of the
respective support bar).
[0168] It may be desirous to attach and detach the accessory 4520
without having the jeopardize the integrity of the assembled
enclosure 4200. Thus, the receptacles need not have a depth that
extends all the way through the thickness of the second portion
4400. Accordingly, the second portion 4400 may have various raised
faces 4531 to accommodate and appreciable amount of material depth
to which the fastener 4528 may extend and engage therein. As shown
the presence of the raised faces 4531 may provide suitable
clearance 4533 so that the support bar 4532 does not come into
inadvertent contact with enclosure fasteners 4511.
[0169] As shown in FIG. 14B, a user 4532 may magnetically attach
the assembly 4000 to a suitable surface, which may provide extra
stability as the user 4532 interfaces with the mobile device via
outer touchscreen 4302. Moreover, the user 4532 is now relieved of
having to use one hand to hold the assembly 4000.
[0170] For further convenience, a carrying handle 4530 may be
coupled to the enclosure 4200. The handle 4530 may be coupled to
the second portion 4400 via handle couplers 4529 on each side of
the handle.
ADVANTAGES
[0171] Previously operators/users would not be allowed to carry an
electronic mobile device with them into hazardous areas
(C1D2/Zone2/Zone2/Zone1) as there was no guaranty these devices
will not create a spark (i.e., explosion). So they were using pen
and paper to do their job (inspection, maintenance, turn arounds,
etc.).
[0172] Embodiments of the disclosure advantageously provide for an
explosion proof assembly that may allow operators/users to now
carry their mobile devices within an explosion proof assembly of
the disclosure. Users can now advantageously and beneficially use
customized Apps, take pictures, take videos, and collaborate with
their peers, such via Skype or other Apps. Their work is a lot more
efficient and is still safe.
[0173] While embodiments of the disclosure have been shown and
described, modifications thereof can be made by one skilled in the
art without departing from the spirit and teachings of the
disclosure. The embodiments described herein are exemplary only,
and are not intended to be limiting. Many variations and
modifications of the disclosure presented herein are possible and
are within the scope of the disclosure. Where numerical ranges or
limitations are expressly stated, such express ranges or
limitations should be understood to include iterative ranges or
limitations of like magnitude falling within the expressly stated
ranges or limitations. The use of the term "optionally" with
respect to any element of a claim is intended to mean that the
subject element is required, or alternatively, is not required.
Both alternatives are intended to be within the scope of any claim.
Use of broader terms such as comprises, includes, having, etc.
should be understood to provide support for narrower terms such as
consisting of, consisting essentially of, comprised substantially
of, and the like.
[0174] Accordingly, the scope of protection is not limited by the
description set out above but is only limited by the claims which
follow, that scope including all equivalents of the subject matter
of the claims. Each and every claim is incorporated into the
specification as an embodiment of the present disclosure. Thus, the
claims are a further description and are an addition to the
preferred embodiments of the disclosure. The inclusion or
discussion of a reference is not an admission that it is prior art
to the present disclosure, especially any reference that may have a
publication date after the priority date of this application. The
disclosures of all patents, patent applications, and publications
cited herein are hereby incorporated by reference, to the extent
they provide background knowledge; or exemplary, procedural or
other details supplementary to those set forth herein.
* * * * *