45 results about "Respiratory Protective Device" patented technology

A quantitative fit test (QNFT) system and method for assessing the biological fit factor (FF) performance of respiratory protective devices. The biological QNFT system includes the following three main elements: an aerosol generation system; an exposure chamber; and an aerosol sampling subsystem. The aerosol sampling subsystem includes an aerosol spectrometer that counts particles in discrete size units ranging from 0.5 to 20 micrometers (μm) making it possible to obtain several size-specific FF measurements from a single respirator fit test. A virtual impactor in the aerosol generation system increases the number of challenge particles in the primary target size of interest (1 to 5 μm) and increases the sensitivity of the method allowing FF values of up to one million to be measured without the need to correct for in-mask background particles.

A respiratory device includes a face seal and a unitary body that forms an interface with the face seal and includes a lens and a chassis. The chassis includes at least one port for fluidic connection.

A respiratory protective device in which a face piece (11) is located within the volume of a filter canister (10). The filter canister (10) can be in the form of a hollow section or sections which fit around all or part of the face piece (11) or on either side thereof. Contaminated air that has been purified in the filter canister (10) is ducted in an airtight manner through a hollow assembly (18) into the face piece (11).

A retractable drink system for providing fluid delivery to a wearer with a donned protective mask covering the mouth, the drink system including a drink tube mounted within the interior of the mask, the drink tube having a retracted position and a deployed position; and an actuation coupling externally accessible with respect to the mask, the actuation coupling moving the drink tube between the retracted and deployed positions.

The invention discloses a shoulder type respiratory protection hood. The shoulder type respiratory protection hood comprises a head body part and a shoulder body part, the head body part and the shoulder body part are connected in a sealed mode to form an integral structure, a wearing supporting point of the hood is transferred from the head to the shoulder and is prevented from making contact with the face skin of a wearer, a face transparent area of the hood is enlarged, an air filtering device adopts a disposable filtering element and is suitable for other filtering elements, a supporting device carries a ventilation device, a heat dissipation and dehumidification device and other electronic equipment, and a sealing connection mechanism for forming a whole-body protection suit is reserved. According to the shoulder type respiratory protection hood, comprehensive head respiratory protection is provided for the wearer through the overall structure, meanwhile, the wearing mode is improved, the obstacles of face recognition and expression communication of the wearer are overcome, the air filtering mode and the applicability of the air filtering mode are improved, the comfort consideration of a respiratory protection device is increased, the intelligent function of the respiratory protection device is expanded, and the shoulder type respiratory protection hood can be developed into the integral protection suit.

The invention belongs to the technical field of medical appliances, and discloses a transparent respiratory protective device. The transparent respiratory protective device comprises a fixing strap, and a protective mask and a protective eye mask which are connected with each other; the protective mask comprises a transparent snout panel and a first sealing ring; the first sealing ring and the transparent snout panel form a closed respiratory chamber together; the protective eye mask comprises a transparent eye panel and a second sealing ring; and the second sealing ring and the eye panel forma closed eyeglass chamber together. The transparent respiratory protective device disclosed by the invention has the advantages of simple structure, uneasiness in fogging, better virus blocking effect, facilitating communication with external and the like. Protective clothing with the transparent respiratory protective device disclosed by the invention has the advantages of good protecting effect, more convenience and smoothness in communication with the external and the like, is higher in cost performance, can be widely applied to routine prevention and control work of medical personnel, quarantine personnel or disinfection workers in respiratory infectious diseases, and has a very wide market application prospect.

The invention discloses a breath protection device and further discloses a protection wearing system with the breath protection device. The breath protection device comprises a shell, a fan device, acontrol device and an air flow sensor, the shell is provided with a mounting opening used for allowing a filter box to be mounted, the fan device is arranged in the shell, the fan device is provided with an air inlet and an air outlet, the air inlet communicates with the mounting opening, the control device is arranged in the shell, the control device is electrically connected with the fan device,the air flow sensor is arranged at the air inlet or the air outlet so as to detect the air flow, and the air flow sensor is electrically connected with the control device. By arranging the air flow sensor, the actual air flow can be detected, the control device adjusts the rotating speed of the fan device according to the change of the air flow, when the air flow is lower than a set threshold value, the control device can control the fan device to increase the rotating speed, it is guaranteed that enough air can be conveyed to a user, the air flow can be relatively constant, and normal breathof the user can be guaranteed.

A helmet having a movable and openable jaw shield is disclosed. The movable jaw shield is pivotable about a hinge located on the front of the helmet chin bar. The movable jaw shield in open configuration clears the space in front of the user's mouth to facilitate communications from the user. Preferably, the movable jaw shield may also be detached from the pivot to be removed or interchanged. The movable jaw shield is suited with a breath guard configured to mate with a protrusion on the lower front portion of goggles frames. The mating of the goggles and breath guard preferably substantially prevent environmental foreign materials from entering between the breath guard and goggles.

The invention provides a respiratory protection device. The device comprises an outer shell part, a sound amplifying element, a filter part, a main body, a base and a mask. A ventilation opening is formed in the end of the main body, the filter part and the outer shell part are arranged on the end of the main body, a preset spacing distance is arranged between the outer shell part and the main body, the filter part is arranged between the outer shell part and the main body, a ventilation gap is spaced between the filter part and the outer shell part, the main body is arranged on one side of the base, a cavity with an air outlet is formed between the main body and the base, the mask is arranged on the other side of the base, and the sound amplifying element is arranged in the respiratory protection device and used for amplifying the received sound. According to the respiratory protection device, the ventilation gap is formed between the outer shell part and the filter part, the filter part can be protected, the air inlet efficiency is improved, the condition of expiratory dyspnea or depressing is avoided to a certain degree, the sound amplifying element can amplify the sound sent out by a user, and the user can communicate with other persons normally when wearing the respiratory protection device.

A filter unit for use in a filter box assembly, the filter unit comprising a particulate filter layer and a gas filter layer, the particulate filter layer being configured to bias towards the gas filter layer, exerting pressure thereon. There is also described filter box assemblies (including a duel filter assembly) comprising the filter unit, and a respiratory protective device comprising the filter unit. Also described is a method of manufacturing a filter unit with a gas filter layer and a particulate filter layer, wherein a force is applied to the particulate filter layer causing it to fix the gas filter layer in place. Also described is a method of manufacturing a dual filter assembly wherein a casing is twice reversibly attached to and detached from a support surface, filter units being added to the casing when the casing is attached to the surface.

A helmet breath guard add-on which is capable of effectively preventing steam formation in a helmet shield, thereby removing inconveniences when wearing a helmet, is disclosed. The breath guard may be made from a flexible yet solid elastomeric material providing for an adequate elastic adjustment, and allowing a fit to a wide variety of different helmet user faces. Preferably, the single piece nature of the breath guard allows for the prevention of leaks for adequate helmet fog reduction. The elastic nature of the material allows the breath guard to generally keep its shape even when distorted from the putting on and the removal of the helmet.

The invention relates to the technical field of respiratory protection devices, and discloses a defogging mask for field operation medical treatment. The defogging mask comprises a main body, a mask body is arranged on one side of the main body, and damping springs are arranged on the left side and the right side of the upper portion of the top of the left side of the mask body. According to the defogging mask for field operation medical treatment, through the combined action of a fixing plate, an extension spring, an arc-shaped scraping plate, a traction rod, a fixing sleeve and a pull ring in a scraping mechanism, the fixing plate plays a role in fixing, the pull ring is pulled downwards to drive the traction rod to move downwards, therefore the arc-shaped scraping plate is pulled to do up-down stretching movement on the inner wall of the mask body, the extension spring can move along with the arc-shaped scraping plate, the fixing sleeve can fix the rod body of the traction rod, the pull ring is loosened after the rod body of the traction rod is pulled to the bottom, the extension spring can automatically pull the arc-shaped scraping plate back to the original position, and therefore when fog exists inside the mask body, the effect that fog can be rapidly removed without disassembling the mask can be achieved.

The invention discloses a tunnel respiratory protection device with the detection and alarm prompt. The tunnel respiratory protection device comprises a cylindrical mounting block and a first circular groove in the surface of the rear side of the cylindrical mounting block. A respiratory mechanism is arranged in the first circular groove. A fixing mechanism is arranged on the side surface of the cylindrical mounting block. An alarm detection prompting mechanism is arranged on the side surface of the cylindrical mounting block. A controller is arranged on the side surface of the cylindrical mounting block. The input end of the controller is electrically connected with a first arc-shaped electronically-controlled orifice plate, an oxygen concentration detection sensor, an infrasonic wave detection sensor, a gas concentration detection sensor and a temperature sensor. The output end of the controller is electrically connected with alarming lamps. The tunnel respiratory protection device has the beneficial effects of being simple in structure and high in practicability.

A helmet breath guard add-on which is capable of effectively preventing steam formation in a helmet shield, thereby removing inconveniences when wearing a helmet, is disclosed. The breath guard may be made from a flexible yet solid elastomeric material providing for an adequate elastic adjustment, and allowing a fit to a wide variety of different helmet user faces. Preferably, the single piece nature of the breath guard allows for the prevention of leaks for adequate helmet fog reduction. The elastic nature of the material allows the breath guard to generally keep its shape even when distorted from the putting on and the removal of the helmet.

The invention belongs to the technical field of medical devices and relates to a protective device, in particular to a protective device for a respiratory clinician. The protective device comprises abase, two symmetrical openings are formed in the base, a rotation area is arranged on the base, and a rotary base is rotationally connected in the rotation area; the rotary base is provided with seatareas corresponding to the openings, a middle area is arranged at the portion, between the seat areas, in the rotary base, and a left area and a right area are arranged on the two sides of the middlearea respectively. A second containing chamber is arranged in the left area, a grabbing support corresponding to the second containing chamber is arranged in the middle area, and an accessory supportcorresponding to the grabbing support is arranged in the right area. A baffle structure is arranged in the middle of the base, a front cover plate structure and a rear cover plate structure which arematched with the rotary base are arranged on the two sides of the baffle structure respectively, the front cover plate structure is fixedly connected with the base, the rear cover plate is slidably connected with the base, and the grabbing support and the second containing chamber are arranged below the rear cover plate structure. By means of the protective device, the problem is effectively solved that an existing respiratory protective device is poor in protection effect.

The invention discloses a pressure flow regulator, which belongs to components of respiratory protective devices or respiratory devices. A high-pressure cavity, a low-pressure cavity and a diaphragm cavity are disposed inside a regulator, and the purpose of automatic air supply is achieved by means of controlling deformation of a diaphragm by the aid of negative pressure generated by a breather. The pressure flow regulator has the advantages that the volume of air which enters an air sac within unit time can be automatically regulated according to inspiration capacity of a wearer, the purpose of automatically regulating the inspiration capacity is achieved, and the sensation of asphyxia of the wearer is prevented.

The invention discloses a respirator and an active air supply type breathing protective device with the respirator. The respirator is matched with a mouth and a nose, and a breathing cavity is formedin the inner side of the respirator. The respirator is further provided with an air supplying channel and an air inlet fan located in the air supplying channel. An air supplying opening of the air supplying channel communicates with the breathing cavity. The air supplying opening is located above the mouth and the nose of a user when the user wears the respirator. An air inlet of the air supplyingchannel communicates with the outside through a filtering net covering the outer side of the air supplying channel. The respirator further includes an air exhausting opening. The air exhausting opening is located below the mouth and the nose of the user when the user wears the respirator. The active air supplying type breathing protective device is small in occupied three-dimensional space and beautiful in appearance and can be accepted by the public; by arranging the filtering net externally, not only is daily replacing of the filtering net convenient, but also the use area of the filteringnet is effectively increased; and exhaust gas circulation is avoided through the excellent airflow channel and follow-up design of air flow, and the utilization rate of airflow is improved.

A helmet having a cheek pad is provided. The helmet for use with the cheek air pad includes an outer shell having an inside surface, an inner liner surrounding the head of the user and operatively mounted to the helmet outer shell, a chin bar disposed below the face visor, the chin bar having an inside surface facing toward the person when wearing the helmet and a breath guard. The inner liner generally has an inner face and a transparent face visor is attached to the helmet outer shell. The cheek pad is preferably embodied as a deformable element extending upwardly and / or inwardly from the helmet inner liner on the right and / or left inner side of the face visor or goggles. The deformable element is configured to be in contact with the face of the user and the inner edge of the breath guard and the inner liner.

The invention relates to the technical field of respiratory protection devices, in particular to a filtering layer structure based on a mask, two sides of a filtering layer are provided with continuous and crossed rack-shaped ventilating grooves, and the ventilating grooves comprise a first ventilating groove, a second ventilating groove, a third ventilating groove or a fourth ventilating groove; each ventilation groove comprises a first ventilation groove wall and a second ventilation groove wall which are connected with each other, and the first ventilation groove wall and the second ventilation groove wall are formed by folding the filter layer; the ventilation grooves are composed of one or more of the first ventilation groove, the second ventilation groove, the third ventilation groove and the fourth ventilation groove. The filtering layer structure can effectively reduce the exhalation resistance under the condition of keeping the filtering effect unchanged, and is more comfortable to wear and use for a long time.

A double-layer transparent breathing filtering mask comprises a double-layer transparent frame shell used for covering the face of a user, the double-layer transparent frame shell is made of hard and double-layer transparent materials in an overlapped mode, and in a visible area of a wearer, the top face and the front face of the double-layer transparent frame shell are of a visible structure, each face of the frame shell is provided with an interlayer and forms a double-layer structure, and air holes used for achieving air exchange inside and outside the frame shell are formed in the double-layer structure area of the frame shell, and a filter layer which is arranged in an inner and outer interlayer of the frame shell and is used for filtering airflow entering the frame shell. Through the structural design, the interlayer respirator provided by the invention not only provides a filtering function, but also can be perspective, the temperature difference and the air pressure difference between the inner layer and the outer layer can be kept to reduce fog formation, and all the parts are matched to form a closed breathing system to serve as a filtering and perspective medical breathing protection device.

The invention relates to a filter-type respiratory protective device which includes a facepiece, two ear loops and an air valve. The air valve is connected to the facepiece and provided with a partition to divide an internal cavity into a first chamber and a second chamber. The second chamber is formed with a perforation for connection to an external equipment. The air valve is configured to manage the exhaled air to flow unidirectionally from an interior space defined by the facepiece to the ambient through the first chamber.

The invention discloses an expiratory valve used for a respiratory protection device. The expiratory valve comprises a through hole and a gas exhaust tube, wherein the through hole is formed in a proper position of a cover body of the respiratory protection device; the gas exhaust tube penetrates through the through hole; the edge of one end of the gas exhaust tube is fixedly connected to the edge of the through hole in a gastight mode, and the other end of the gas exhaust tube extends to the outer side of the cover body of the respiratory protection device; the gas exhaust tube is a hose which is made of thin, soft and gastight plastic, rubber or a composite material; the end, at the outer side of the cover body, of the hose is curled; part of the hose wall of the hose is fixedly arranged at the outer side of the cover body of the respiratory protection device; and a nose plug tube is connected with the through hole in the gastight mode. The expiratory valve disclosed by the invention has the advantages of being simple in structure, convenient to process, low in cost and the like, further has the characteristics of being flexible in design, neat in appearance and the like; and after the nose plug tube is additionally arranged, expiration and inspiration can be separately carried out, so that formation of a dead space is completely avoided, and the problems in the prior art are effectively solved.