Abstract: A harness for use with breathing apparatus has: a flexible hip plate 12 and a flexible bandolier-style shoulder panel 14, linked together by a strap 15, and a waist belt 16 fastenable by a sprung fastener. In use, the flexible hip plate 12 rests against the hip of a user (the left hip in this example), the waist belt is fitted around the waist of the user, and the shoulder panel 14 rests against the shoulder opposite to the hip against which the flexible plate is resting (the right shoulder in this example). At least the bandolier-style panel 14, and optionally also the hip plate 12 of the harness 10, are made of a resilient material which, though flexible, allows the harness substantially to retain its operational configuration even when not being worn. The material is preferably a composite, and may comprise closed cell, open face foam, such as compression moulded EVA foam. Two layers of such foam may be used in a sandwich construction, and may be glued or otherwise bonded together.

Abstract: A gas regulator includes a delivery valve assembly having a delivery outlet and a delivery valve member engageable with the delivery outlet for controlling flow of a gas from a gas source. A timing gas chamber receives gas from the gas source. Gas pressure within the timing gas chamber controls the operation of the delivery valve member. An adjustment system controls the amount of time required for the gas to fill the timing gas chamber so as to control the length of time that the delivery valve assembly is opened to conserve gas. In other embodiments, a capacity adjustment system can adjust the capacity of a gas reservoir system.

Abstract: A breathable air safety system and method having a fill station are disclosed. In one aspect, a method of safety of a building structure is described. A prescribed pressure of an emergency support system is ensured to be maintained within a threshold range of the prescribed pressure by including a valve of the emergency support system to prevent leakage of breathable air from the emergency support system. A filling process of a breathable air apparatus is safeguarded by enclosing the breathable air apparatus in a secure chamber of a fill site of the emergency support system of the building structure. The prescribed pressure of the emergency support system is designated based on a municipality code that specifies a pressure rating of the breathable air apparatus. The prescribed pressure of the emergency support system is maintained such that a system pressure is compatible with the breathable air apparatus.

Abstract: A breathable air safety system and method having at least one fill site is disclosed. In one aspect, a method of safety of a tunnel structure is disclosed. A prescribed pressure of an emergency support system is ensured to be within a threshold range of the prescribed pressure by including a valve of the emergency support system to prevent leakage of breathable air from the emergency support system. The prescribed pressure of the emergency support system is designated based on an authority agency that specifies a pressure rating of the breathable air apparatus. An air extraction process is expedited from the emergency support system by including a RIC (rapid interventions company/crew)/UAC (universal air connection) fitting to a fill panel to fill a breathable air apparatus.

Abstract: A powered air-purifying respirator that includes an enclosure, defining a single contiguous enclosed interior, an inlet duct, including an inlet and a distribution portion, that guides ambient air to the interior of the enclosure, a plurality of filter canisters disposed within the interior of the enclosure, and a blower that forces air through the at least one inlet, into the interior of the enclosure and through the plurality of filter canisters to produce filtered air suitable for breathing. A valve controls the flow of ambient air through the inlet duct. A fluid dam, disposed in an air path between the inlet and the filter canisters prevents liquids from reaching the filter canisters. The enclosure is reinforced and is adapted to provide protection for the filter canister from flame and heat while the filter canister is in use. A recirculation valve recycles previously-filtered air back into the enclosure.

Abstract: An improved self contained breathing apparatus (SCBA) includes a large cylindrical tank of a first diameter having a first weight when holding a first quantity of a breathable gas under a first pressure, an on/off valve, a pressure regulator and a gas distribution device. The improvement comprises replacing the large tank with at least two smaller cylindrical tanks, each of a second diameter which is substantially smaller than the first diameter and a pressure header in fluid communication with each smaller tank and the on/off valve. The smaller tanks and the pressure header have a second combined weight when holding a second quantity of the breathable gas under a second pressure. The second combined weight is substantially the same as or less than the first weight when the first and second pressures are substantially the same and the first and second quantities of the breathable gas are substantially the same.

Abstract: A wearable oxygen concentrator system is provided. The wearable oxygen concentrator system includes a pumping system configured to receive air and to remove nitrogen gas from the air to obtain concentrated oxygen. The pumping system is further configured to deliver the concentrated oxygen via a cannula tube to a person. The wearable oxygen concentrator system further includes a clothing member configured to be worn by the person. The clothing member is configured to hold the pumping system therein.

Abstract: A flexible, high pressure, tubular storage vessel for storing and dispensing a compressed gas. The vessel has a gas impermeable inner core member comprising a flexible material and defining an inner diameter of a fluid-carrying channel adapted to store the compressed gas. A flexible reinforcing material is circumferentially disposed about the inner core member. The flexible reinforcing material is surrounded by an air-tight gas barrier wrapping defining an outer diameter. The vessel is configured to be coiled or shaped having a plurality of bends. The bend areas may have a variable inner diameter and are preferably provided with additional reinforcing material.

Abstract: A scuba mask purging apparatus and method providing selective introduction of pressurized air into a scuba mask to initiate purging, pressure balancing, and de-fogging. An inlet valve, typically positioned conveniently on the top or the side of the mask may control the release of pressurized air into the mask. A pressure-sensitive outlet valve releases the pressurized air to force water from the mask. The outlet valve may be positioned on the lower portion of the mask or at a location where water is likely to collect.

Abstract: A system (20) is provided for a firefighter or other emergency worker and includes a protective coat (10) and a self-contained breathing apparatus (12). The self-contained breathing apparatus includes a regulator (14) connected by a high pressure hose (16) to an oxygen/air tank (18) that is carried by the coat (10).

Abstract: A system is provided for a firefighter or other emergency worker and includes a protective coat and a self-contained breathing apparatus. The self-contained breathing apparatus includes a regulator connected by a high-pressure hose to a gas tank that is releasibly carried on the coat by shoulder straps and waist straps.

Abstract: A combination of an SCBA system for providing bottled air to a user and a PAPR system for purifying ambient air for use by a user wherein the two systems are used alternatingly depending on the contaminated condition of the ambient air and the oxygen content of the ambient air.

Abstract: A rebreather apparatus having a gas scrubber canister with a generally oval or elliptical cross section. The canister being configured so that exhaled gases pass through the adsorbent in a radial manner through a generally hollow tube having the same cross sectional shape as the canister. The shape of the canister allows for increasing the volume of the canister relative to round cylinder shaped canisters without making it too cumbersome such that it effects the efficiency of a diver. The canisters have at least one removable end cap and the end caps are configured for housing gas addition and control systems. The rebreather apparatus can be rapidly reconfigured to provide a variety of fully closed or semi closed circuit configurations and it can be reconfigured to be worn in a variety of ways based on tasks to be performed and diver preference.

Abstract: The present invention concerns a method for detecting the start of a dive for implementation in a portable electronic device (1) of the diving computer type. More specifically, the method is for implementation in a device of this type having at least a first operating mode and a second operating mode, called the dive mode. This device includes a pressure sensor (5) for measuring the ambient pressure value (P) and electronic circuits (2) for processing the pressure measurement results including a time base (4) and at least one memory zone (7, 8). The detection method according to the present invention more particularly proposes making correction to certain measured pressure values before storing them as reference pressure values (Pref). Thus, the start of a dive can be detected with a high level of reliability solely on the basis of ambient pressure measurements.

Abstract: An information processing device for a diver used for diving by using a plurality of mixed gases in which the mixture ratios of a plurality of diving gases are the same or different determines the switch timing of the mixed gas on the basis of a preset scheduled dive pattern and an actual dive pattern up to present. A notification is issued regarding the switch timing and information for specifying the mixed gas to which a switch is to be made based on this switch timing. When the diver selects one of the cylinders as the cylinder to which the switch is to be made and in which the mixture ratio of the diving gas is different, processing is carried out that prohibits switching to the selected cylinder when it is determined that the selected cylinder may create a danger of oxygen deficiency or oxygen poisoning.

Abstract: An improved underwater breathing apparatus includes a gas- and liquid-tight helmet, with an attached air valve, tank coupling and tank bracket. The helmet further includes a flange generally conforming to the shoulders of a user, and incorporates ballast material. The air valve is attached to the helmet with the tank coupling and the tank bracket is attached to the tank coupling. When worn, the tank bracket is oriented substantially parallel to, and a finite distance away from, the user, whereby only the flange contacts the user. In other embodiments the helmet further includes an optically transparent face shield, or the entire helmet is may be manufactured from an optically transparent material. A handle may be attached to the helmet to aid in lifting and storage. The air valve may include an air flow regulator, a compressed air supply coupling or an air flow gauge.

Abstract: The invention relates to breathing apparatus, particularly of the open-circuit type, comprising a backpiece equipped with means, particularly involving straps, to allow it to be worn on the back of a wearer, the backpiece being intended to support at least one cylinder equipped with a valve, the backpiece being equipped with a coupling which, intended to collaborate with the valve, is connected to a regulator. The coupling comprises an air intake tube on which a bushing is mounted such that it can pivot and move in terms of axial translation. The bushing is mounted in a sleeve that forms an operating knob, is prevented from turning in the sleeve and is free in terms of translational movement with respect to the latter. The sleeve is mounted such as to pivot on the coupling about the axis of the tube and is prevented from translational movement with respect to this tube.

Abstract: Modes, methods, systems and devices are described for providing assisted ventilation to a patient, including wearable ventilation systems with integral gas supplies, special gas supply features, ventilation catheters and access devices, and breath sensing techniques.

Abstract: An improvement to a combination of an SCBA system for providing bottled air to a user and a PAPR system for purifying ambient air for use by a user wherein a sensor is included to determine the oxygen content of the breathing gas and the presence of contaminations in the atmosphere to control operation of the two systems depending on the contaminated condition of the ambient air and the oxygen content of the ambient air.

Abstract: A breathing gas feed assembly for the flight crew of an airplane comprises an emergency breathing mask and a stowage box for the mask. The box is adapted to receive the mask diagonally and it is closed by two doors hinged about respective hinge axes situated on two adjacent edges of the box.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to fluid pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element which is sufficient to close the inlet opening to fluid flow absent a pre-established level of fluid pressure exerted on the pressure responsive element. A fluid filter element is also disposed within the passageway; and a retainer device is positioned for removably securing the filter element within the passageway.

Abstract: Transportable device for storing and delivering oxygen includes a casing containing a cryogenic tank, a heating circuit connected to the tank including at least one member for heating/vaporizing the oxygen originating from the tank for the purpose of its being supplied to a user, a circuit for filling the cryogenic tank including a fluidic connection member designed to be connected, in a filling direction, to a matching connector of a liquid oxygen reserve, a venting valve connected inside the tank, a manually actuated movable member for controlling the venting valve, the control member being movable relative to the casing for actuating the valve via a system for transmitting movement between closed and open positions of the venting valve so in moving from closed to open positions, the control member describes a movement having at least one component oriented substantially towards the inside of the casing and/or in the filling direction.

Abstract: A portable liquid oxygen (LOX) storage/delivery apparatus is provided, including an insulated (LOX) container having an interior, a top portion, a bottom portion and a sidewall, the sidewall including a first side portion and a second side portion, both extending between the top portion of the bottom portion, and a port system in communication with the interior of the container for charging the container and for withdrawing LOX and gaseous oxygen from the container.

Abstract: An on-off valve mounted in a high pressurized gas container, which has a holding portion for holding a flow amount controlling member in a path formed in an upper stream side of the body of the valve, and in which a flow amount controlling member is movably held. In the flow amount controlling member, an orifice is formed. When the valve moves into an opening position, a high pressurized oxygen gas is flowed into a valve chamber by gas pressure, the flow amount controlling member moves and closes the path. At this time, the gas flow amount is restricted by the orifice, so that the pressurizing speed of the gas pressure at the down stream side of the orifice becomes slow and then heat generation due to the adiabatic compression is reduced.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element sufficient to close the inlet opening to fluid flow absent a pre-established level of pressure exerted on the pressure responsive element in opposition to the bias force. Finally, a retainer device is positioned for removably securing the pressure responsive element and bias force exerting mechanism within the passageway.

Abstract: Provides an emergency air supply system that is worn around the arm, presumably the wrist, and intended for use in air restrictive emergency conditions. Primarily it has been designed for the need to improve safety for water recreation or water sports where an individual is often caught gasping for air. This device is purposely designed to be no more obtrusive than a piece of clothing, such as a bathing suit, or a watch band would be, in order that it does not unduly restrict the water activity or water sport or any other potentially air restrictive activity you may engage in. The design is intended to encourage usage and increase safety, by way of its structural design that uses the strap-band itself as the mechanical structure of the entire mechanism. Thus creating a unique compact design, that is convenient to wear and provides air when you most need it.

Abstract: There is described a wearable garment capable of supplying air to a user comprising a plurality of compartments disposed about the garment, a plurality of air storage vessels for fitting into respective ones of the compartments, an air regulator, a connector for connecting the plurality of air storage vessels to the regulator, and a breathing member connected to the regulator in fluid communication therewith, wherein the breathing member allows a user to receive air from the plurality of air storage vessels.

Abstract: A valve device, particularly for a breathing regulator for divers, including an inlet chamber which can be connected to a source of gas under super-atmospheric pressure, and an outlet chamber which is under a regulated pressure. A seating, which is movable under the influence of the super-atmospheric pressure and the regulated pressure, seals between the inlet chamber and the outlet chamber and has a through-passing passageway that interconnects the chambers. Also included is a valve body which is movably arranged in the seating such as to open and close the through-passing passageway in the seating. A servo element exerts on the valve body a force that depends on the position of the movable seating, so that varying force-influence on the valve body from the super-atmospheric pressure will be compensated for by a corresponding varying force from the servo element. This results in an essentially constant valve characteristic, while providing a mechanically simple solution at the same time.

Abstract: The invention provides an emergency medical kit for use immediately upon the onset of symptoms of an attack of a vascular disease such as a heart attack or a stroke. The emergency medical kit at least includes breathable oxygen in a light weight container and may include medications for preventing thrombosis, inducing arteriolar relaxation or assisting in diminishing oxygen demand by the victim. The kit including oxygen and medication dosage may be prescribed by a physician to a person with a known susceptibility to a serious unexpected attack of a vascular disease. The treatment provided by the contents of the kit is specifically intended to save the life of an attack victim and or to reduce permanent tissue damage in the victim during the time interval between the onset of the attack and the arrival of a professional medical service provider. The kit is lightweight and readily carried by the user or stored in a location for easy access.

Abstract: A dual air supply breathing apparatus that allows a user to quickly and easily switch between two or more sources of air or compressed gas, such as filtered air from a Powered Air Purifying Respirator (PAPR) and compressed air from a Self-Contained Breathing Apparatus (SCBA). In one variation, the dual air supply breathing apparatus uses a Y-shaped changeover valve with two input tubes and one output tube. The first input tube receives filtered air from a PAPR and the second input tube receives compressed air from a tank. An actuator controls a flap valve within the changeover valve to seal off one of the input tubes while creating a flow path between the other input tube and the output tube. The changeover valve may be controlled by manipulating the high-pressure valve on the tank of compressed gas and/or by manipulating the switch that activates the PAPR.

Abstract: A warning device for a respirator product with a valve (11), which comes into action in a state of warning and releases a gas flow. The warning does not hinder the user of the apparatus and only a very small portion of the gas supply carried with the user is used by the warning device. The gas flow is brought into the range of perception of a person via a scent cartridge (9).

Abstract: Breathing equipment with a circuit for breathing gas and with a flat calcium hydroxide absorber (1) is cooled by an evaporating agent with improved cooling. A gas volume flow of at least 60 L per minute is admitted to the outer surface (14) of the calcium hydroxide absorber (1) receiving the evaporating agent by at least one gas delivery device (5). The evaporating agent is delivered to the outer surface (14) of the calcium hydroxide absorber (1) by an admitted pressure from an evaporating agent reservoir (10) via at least one connection line (12).

Abstract: A system controls and manages administration of a therapeutic gas, such as NO, O2, or the like, to a spontaneously breathing, non-ventilated patient such that concentrated NO is as low as reasonably possible while delivering the desired amount of NO to the distal portions of the lungs. The system includes an entrainment cell that provides remote, turbulent mixing with low temporal latency and can be used with a nasal cannula or a mask. The entrainment cell uses room air to dilute the therapeutic gas; however, supplementary gases can also be used. A baffle can be included to promote mixing and a flow sensor can also be used if desired. Multiple ports can be included in the entrainment cell. An equalizing valve is also disclosed.

Abstract: An isolation suit has a two-way air supply/disinfection pump attached to it. The pump has a pair of through-passages each communicating with an interior of the suit by respective airlines. There is a fan in each through-passage, one of which delivers air to the suit and the other of which extracts air from the suit. The isolation suit has an ultraviolet light in each through-passage for disinfecting air that is drawn through by the fans.

Abstract: A tank retaining device for inhibiting a scuba tank from slipping downwardly in reference to a buoyancy control device. The tank retaining device includes a ring member having a diameter smaller than a scuba tank designed for abutting a bottom the of the scuba tank, and a plurality of strap members operationally coupled to the ring member, each one of the plurality of strap members is couplable to a tank securing strap of a buoyancy control device operationally coupled to the ring member.

Abstract: A compressed air breathing apparatus having a base plate, at least one compressed air bottle detachably mounted to the base plate using a fastening strap and an additional fixing device, and a high-pressure fitting attached to the at least one compressed air bottle. The at least one additional fixing device has at least one mounting hole which is provided in the base plate and a fixing piece on the high-pressure fitting capable of being moved directly into and locked in the mounting hole.

Abstract: The present invention is directed to a nitric gas dispenser for mammals on the run. The dispenser has a housing that contains a valve mechanism. The valve mechanism is interconnected between a nitric gas dispersal component that provides nitric gas at a desired pressure and a gas delivery system that provides the nitric gas at the desired pressure to the mammal. The valve mechanism controls the flow of the nitric gas between the nitric gas dispersal component and the gas delivery system. The dispenser also has a pressure sensor that is positioned along the gas delivery system and determines when the mammal is taking a breadth. If the pressure sensor determines the mammal is taking a breadth, the pressure sensor transmits a breadth signal to a microprocessor. The microprocessor then determines if the mammal is within a prescribed time frame for the mammal to be administered nitric gas.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to fluid pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element which is sufficient to close the inlet opening to fluid flow absent a pre-established level of fluid pressure exerted on the pressure responsive element. A fluid filter element is also disposed within the passageway; and a retainer device is positioned for removably securing the filter element within the passageway.

Abstract: An air delivery system includes a coupling mechanism that is adapted to be connected between a source of oxygen-enriched air and an air cannula that can be worn by a user. The coupling mechanism includes a spool assembly for paying out and for winding up a predetermined length of tubing coupled between the air cannula and the source of oxygen-enriched air. The spool assembly has a sufficiently low drag factor to allow complete mobility of a user wearing the cannula without causing it to be dislodged during pay out of the predetermined length of tubing and without causing it to be dislodged during take up of the predetermined length of tubing.

Abstract: An automatic transfer regulator for automatically switching between a primary (hose line) breathing air source and a secondary source (escape cylinder). A pressure sensing system detects the line pressure of the primary source using a spring loaded poppet connected to one side of a transfer poppet valve, with the other side connected to the output of a reducer. The pressure sensing system is fed by the primary source through an orifice. When the sensor detects loss of hose line pressure, the system pressure is released to ambient. This bleeds the pressure from the system side of the transfer poppet valve, allowing the reducer output to force the poppet back, thus actuating the secondary source. A check valve prevents reducer output from escaping through the primary source inlet.

Abstract: A portable, handheld medicine delivery device capable producing atomized agents that are adapted to be inhaled through a nebulizer by a patient suffering from a respiratory condition. In addition, the present invention provides a means wherein the dose of the inhaled agent can be remotely monitored and, if required altered, by a physician or doctor. Finally, the present invention embodies an apparatus and method for reducing a high-pressure delivery gas into a lower pressure gas suitable for atomizing a medicinal agent and for inhalation.

Abstract: A combination of an SCBA system for providing bottled air to a user and a PAPR system for purifying ambient air for use by a user wherein the two systems are used alternatingly depending on the contaminated condition of the ambient air and the oxygen content of the ambient air.

Abstract: A combination of an SCBA system for providing bottled air to a user and a PAPR system for purifying ambient air for use by a user wherein the two systems are used alternatingly depending on the contaminated condition of the ambient air and the oxygen content of the ambient air.

Abstract: Inflator regulator having a threaded sleeve and a plurality of different size adapters for connection to a plurality of different size BC hoses. Connecting the inflator regulator to a selected BC hose is accommodated by selecting the corresponding size adapter. The selected adapter is inserted concentrically through the threaded sleeve and then mechanically affixed, such as by a plastic cable tie, to the end of the BC hose. The sleeve is then threaded onto the inflator regulator. In the event that it is desired to connect to a different size BC hose, the above process is simply reversed and repeated using an appropriately selected different adapter.

Abstract: A dive belt is provided for use by divers during underwater activities, such as scuba diving. The belt comprises a body member and a rapid release weight system which is quickly removal while the belt remains in place on the diver. The belt can also provide for horizontally mounted supplemental air supply system, for use in the event a main air supply is lost or not wanted. An elastic depth compensator can be built into the belt, insuring a snug fit of the belt at any depth. The belt has a plurality of D rings for convenient equipment management. A quick release tow clip is attached to the belt and may be used in conjunction with a surface air supply system for pulling the surface air supply system.

Abstract: It is described a portable equipment for providing a user with air purified from solid and/or gaseous polluting substances, comprising at least: —a housing (1) to be worn by the user (for example hanging from his/her belt), containing at least filtering means (2) for detaining the polluting substances which are present in the air and means (3) for sending to delivery means (5) the air coming out from the filtering means (2); —means (6) connecting the housing (1) to the delivery means (5), and —the delivery means (5) to be applied on the head of the user and comprising at least a diffuser (7) for conveying the filtered air to the nose and mouth of the user (thus creating an area filled with clean air) and supporting means (8) for the diffuser (7). The equipment has limited size and weight and can be easily carried by the user without limiting his/her free movements.

Abstract: A warning device for a respirator product with a valve (11), which comes into action in a state of warning and releases a gas flow. The warning does not hinder the user of the apparatus and only a very small portion of the gas supply carried with the user is used by the warning device. The gas flow is brought into the range of perception of a person via a scent cartridge (9).

Abstract: A breathing apparatus and method therefor having a frame capable of carrying a primary air storage tank and an emergency air storage tank, where the emergency air storage tank can either be released from the frame to replace a disabled person's tank, or the emergency air storage tank can remain on the frame and be coupled to a disabled person's face-mask by a hose thus allowing a rescuer to have both hands free in order to carry or drag a disabled person to safety

Abstract: Control valve (10) for a user-donnable breathing device for selectively switching from a normal breathing oxygen source to a pressurized emergency bottle. The valve (10) has a valve body (12) with a normal source inlet and a normal oxygen supply fitting, an emergency source inlet, and a delivery outlet for oxygen flow to the user of the device when donned. A poppet (30) permits normal source oxygen to flow into the valve body (12) and then out of the delivery outlet. The poppet (30) in its normal position maintains a piston (32) in a spring-biased cocked position. When the piston (32) is released from its cocked position, it causes rupturing of a seal (104) of the emergency bottle. A user-operated release permits the poppet (30) to move to a flow blocking position, blocking the normal source inlet and allowing the piston (32) to be driven for piercing the emergency bottle. Emergency breathing oxygen then flows for user emergency breathing in the device, which may be an escape hood for an aircraft passenger.

Abstract: This invention provides a medical diagnosis and therapy system particularly adapted for the combined uses of emergency cardiac defibrillation and pulmonary oxygen administration, including automated patient cardiopulmonary assessment and voice prompted therapy and resuscitation: electrocardio diagnosis/monitoring/defibrillation and electropulmonary blood oximetry/oxygen administration. The system has a case having access opening(s) and clear cover(s) to view the apparatus and contents, to dispel all doubt as to know how to open the case and to make it easy for a user to quickly find and use the various components.