38 results about "Portable ventilators" patented technology

A portable ventilator uses a Roots-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that interact with a ventilator processor to provide user interface functions, exhalation control and flow control servos, and monitoring of patient status. The ventilator overcomes noise problems through the use of noise reducing pressure compensating orifices on the Roots blower housing and multiple baffling chambers. The ventilator is configured with a highly portable form factor, and may be used as a stand-alone device or as a docked device having a docking cradle with enhanced interface and monitoring capabilities.

A portable ventilator uses a Roots-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that interact with a ventilator processor to provide user interface functions, exhalation control and flow control servos, and monitoring of patient status. The ventilator overcomes noise problems through the use of a noise attenuating system comprising noise reducing pressure compensating orifices on the Roots blower housing and multiple noise reducing chambers. The ventilator is configured with a highly portable form factor, and may be used as a stand-alone device or as a docked device having a docking cradle with enhanced interface and monitoring capabilities.

The portable ventilator of the present invention provide a hands-free ventilatory support device in critical care, emergency and resource limited environments. The portable ventilator utilizes ambient air and includes a two dual head compressor system to provide a consistent air supply to the patient. The ventilator device is battery operated and is capable of providing up to 60 minutes of care. In a preferred embodiment, the portable ventilator of the present invention also includes a pneumatic subsystem, a control subsystem, a power subsystem and an alarm subsystem. The portable ventilator of the preferred embodiment includes a dual head and single head compressor system that operates alternatively, to provide a consistent and continuous inhalation and exhalation cycle.

A method and apparatus for controlling a brushless DC (BLDC) motor over a wide range of angular speeds is presented. Analog magnetic sensors provide continuous signal measurements related to the rotor angular position at a sample rate independent of rotor angular speed. In one embodiment, analog signal measurements are subsequently processed using an arctangent function to obtain the rotor angular position. The arctangent may be computed using arithmetic computation, a small angle approximation, a polynomial evaluation approach, a table lookup approach, or a combination of various methods. In one embodiment, the BLDC rotor is used to drive a Roots blower used as a compressor in a portable mechanical ventilator system.

The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers. The perforated tube has a port through which gas is accepted and at least one exterior tube through which gas exits. Impedance mismatches are created between the inlet chamber and the exterior tubes and between the exterior tubes and the chamber in which the perforated tube is located, which are useful in attenuating noise. One embodiment of the invention comprises a noise attenuating mounting system for a compressor. The mounting system comprises flexible mounts that cooperate to dampen vibrations generated by the compressor.

The portable ventilator of the present invention provides a hands-free ventilatory support device in critical care, emergency, and resource-limited environments. The portable ventilator utilizes ambient air and includes a two dual head compressor system to provide a consistent air supply to the patient. The ventilator device is battery operated and is capable of providing up to 60 minutes of care. In a preferred embodiment, the portable ventilator of the present invention also includes a pneumatic subsystem, a control subsystem, a power subsystem and an alarm subsystem. The portable ventilator of the preferred embodiment includes a dual head and single head compressor system that operates alternatively, to provide a consistent and continuous inhalation and exhalation cycle. A portable ventilator of a second preferred embodiment includes a sole dual-head compressor that operates to provide a consistent and continuous inhalation and exhalation cycle.

A patient ventilator secretion management system is disclosed. The system has a valve with an input in pneumatic communication with a therapeutic breathing gas source. The valve has variable positions, each of which corresponds to a specific flow rate of gas being output therefrom. A patient ventilation interface is in pneumatic communication with the valve over a gas delivery circuit. A controller in communication with the valve regulates the position thereof. The controller sequentially switches the valve from one of the variable positions to another to output a first range of fluctuating flow rates of gas for delivery to the patient ventilation interface during at least a selected one of patient expiratory and inspiratory phases.

Provided is a portable ventilator system, including a ventilator supply system having a ventilator mask, an air/oxygen source and an air/oxygen regulator system, and including a communications device that, during use, automatically contacts an emergency response entity in response to activation of the portable ventilator system. Also provided is a ventilator system that includes at least one ventilator mask sized to fit upon a selected range of sizes of human faces, a ventilator supply system having an air/oxygen source and an air/oxygen regulator system, and an air/oxygen flow regulation valve having an inlet, an inlet/outlet in communication with a ventilator mask coupled to the ventilator supply system, and an outlet in communication with a surrounding atmosphere. During use, air/oxygen flows through the inlet and the inlet/outlet to facilitate ventilation of a human, and air/oxygen flows through the inlet/outlet and the outlet to facilitate exhalation by a human to the surrounding atmosphere. Further, during use, one of the ventilator masks is coupled to the ventilator supply system to provide air/oxygen to a human, and the air/oxygen regulator system regulates air/oxygen flow parameters as a function of a size of the ventilator mask coupled to the ventilator supply system.

The invention discloses a portable ventilator. The portable ventilator comprises a shell, a draught fan box (101), a cut-off device (108) and a control device (113) are arranged in the shell, a draught fan (8) is mounted in the draught fan box (101) through a noise reducing device, an air outlet of the draught fan is connected with an interior breathing tube (107), the cut-off device (108) is arranged on the interior breathing tube (107), a sensor is arranged in the cut-off device (108), the sensor is connected with the control device (113), a humidifying device (106) is arranged in the shell, an air outlet of the cut-off device (108) is connected with the humidifying device (106) through the interior breathing tube (107), and the air outlet of the humidifying device is connected with a breathing tube (104) and a mask (105). The noise of the ventilator is low, and the breathing gas parameters can be precisely detected for realizing anti-backflow for 360 degrees.

A portable breathing machine includes a body case (100), wherein: a fan box (101), a cut-off device (108) and a control device (113) are arranged in the body case (100); a fan (8) is arranged in the fan box (101) through a fan noise reduction device (102); an air outlet of the fan box (101) is connected with an internal breathing tube (107); the cut-off device (108) is arranged on the internal breathing tube (107); an air outlet of the cut-off device (108) is connected with an external breathing tube (104) and a mask (105); the fan noise reduction device (102) includes a lower flexible cover (3) and an upper flexible cover (5); the lower and upper flexible covers cooperate to form an enclosed cavity for containing the fan (8). A working noise of the breathing machine is decreased to below 15 decibel.

The invention relates to a portable respirator based on the self-supply of oxygen, which comprises a respirator (1), and is characterized by also comprising a self-prepared oxygen source device (2), wherein the respirator (1) and the oxygen source device (2) are connected by an easily-detachable connecting structure; the oxygen source device (2) comprises a shell (2-1) with an air inlet; a filter (2-2), a supercharger (2-3), a cooler (2-4), an electromagnetic valve (2-5), a molecular sieve bed (2-6), an oxygen tank (2-7), a pressure regulating valve (2-8), a power module (2-14), a program logic controller (PLC) (2-15) and an operation state display mode (2-16) are arranged in the shell; one of the input/output (I/O) ports of the program logic controller (PLC) (2-15) is connected with the signal input/output end of the supercharger (2-3); another I/O port of the program logic controller (PLC) (2-15) is connected with the signal input and output end of the electromagnetic valve (2-5); and the left I/O port of the program logic controller (PLC) (2-15) is connected with the one of the signal input/output ends of the operation state display mode (2-16). In the invention, seamless connection and oxygen self-supply can be realized, and the portable respirator has the characteristics of portability, safety, reliability and wide application range.

A portable ventilator for removing deleterious gasses from a welding site provides a funnel-like collection head structurally carried by an electrically non-conductive rigid dispersement tube carrying a powering structure. The powering structure provides pressurized gas from an external source through an adjustment valve to an input nozzle carried in axial alignment in the channel defined by the dispersement tube spacedly adjacent the joinder of the collection head with the dispersement tube to output pressurized gas toward the distal output end of the dispersement tube.

The invention relates to an air circuit system for a portable respirator. The air circuit system comprises an air circuit communicating pipeline, a pressure reducing valve (REG1) and a flow adjusting valve (NV), wherein the air circuit communicating pipeline is connected between a respirator output end (22) and a unique air source input end (21); the REG1 and the NV are arranged on the air circuit communicating pipeline and are serially communicated by an input-output air circuit; the air circuit system further comprises a two-position and three-way control valve (SV1) and a free respiration valve (EV1); the air output end (32) of the SV1 is divided into two paths which are in respectively air circuit communication with a control end of the EV1 and a control end of the NV; a first air inlet end (31) of the SV1 is in bypass air circuit communication with an air circuit communicating pipeline between the REG1 and the NV; a second air input end (33) of the SV1 is in bypass air circuit communication with an air circuit communicating pipeline between the NV and the output end of the respirator; and the EV1 is in bypass air circuit communication with an air circuit communicating pipeline between the NV and the output end of the respirator. The air circuit system further comprises a linking adjustment device (GS1) for linking adjustment of the NV and adjusting the SV1 to conduct the switch frequency through a variable electronic element.

The invention discloses a portable respirator comprising a housing, a blower fan, an air outlet pipe and a control circuit board; the blower fan is connected with the air outlet pipe so as to convey air to the air outlet pipe; an air pressure and flow rate monitoring device is arranged in the housing; the air outlet pipe outlet is provided with an airway, and connected with the air pressure and flow rate monitoring device, thus detecting output air pressure and flow rate; the air pressure and flow rate monitoring device is connected with the control circuit board, and used for sending obtained electric signals to the control circuit board; the control circuit board can adjust the output air flow rate and air pressure according to the received signal. The portable respirator employs a more compact internal structure and miniature parts, and the airway components are simple, thus obvious reducing the equipment volume; the portable respirator is easy to move, easy to carry, and more economical and suitable; in addition, various damping and noise reduction measures are carried out, thus effectively controlling respirator working noises.

The invention provides a respirator system and method. A portable respirator includes a ventilation drive configured to drive ventilation gas from a gas source to a patient, where the portable respirator is configured to be removably connected to a host such that when the portable respirator is connected to the host, the ventilation drive drives the ventilation gas from the gas source to the patient. The ventilation driver drives ventilation gas from a host gas source to the patient when the portable ventilator is connected to the host, and drives ventilation gas from a portable gas source to the patient when the portable ventilator is not connected to the host.