Valve device intended for use in an apparatus for examining human metabolism processes through analysis of the breathing air, provided with a connection for a patient mouth-piece and a connection for the hose to the apparatus, an inhalation valve which opens as a result of inhalation and an exhalation valve which opens as a result of exhalation wherein the two connections are disposed in line with each other on a substantially cylindrical housing, and wherein the inhalation valve is formed by se...

Breathing aid comprising a tube (4) which forms a main channel (5) and which is intended to be connected by its distal end (3) to a breathing tract of a patient so that the main channel (5) connects the breathing system of the patient to the outside. The breathing aid further comprising at least one auxiliary channel (8,8.1) for injecting a gas jet for ventilating the patient and opening into the main channel (5) close to the distal end (7) thereof. According to the invention this device is char...

A breathing device for tracheotomy patients, comprising a holder (12) detachably connected to the outer end of a tracheal cannula (11) or to a stoma in the patient's throat, the holder holding detachably a regenerative heat-moisture exchanger (14). The holder (12) is an air-proof receptacle having a first opening (12a) communicating with the outer end (11b) of the tracheal cannula (11) or with the stoma in the throat and a second opening (12b) situated opposite the first opening. The heat-moistu...

A breathing apparatus has first bellows and second bellows, the first bellows being so designed as to expand by a part of air exhaled by the diver or wearer of the breathing apparatus being supplied thereto through a mouth piece and the second bellows being so designed as to contract as the pressure of a surrounding atmosphere around the breathing apparatus, i.e., the atmospheric pressure under water. When the sum of an expanded amount of the first bellows and a contracted amount of the second m...

A breathing apparatus of the type having a rebreathing system from which the user inhales and into which he exhales and which receives fresh gas making up for consumed oxygen. The rebreathing system alternately operates as a fully closed system and a fully open system; it operates in the closed mode during a series of breaths until the oxygen in the system has been consumed, and then it operates in the open mode to permit exhalation to the ambient medium. The switching of the system between the ...

A breathing device for use by a postoperative patient to prevent pneumonia comprises: a closed elongated tube having a volume of about 800 cc to about 1,500 cc; a mouthpiece at one end of the tube; air openings at the other end of the tube for admitting air when air is inhaled from the tube and for expelling air when air is exhaled into the tube; a valve associated with the air openings and adapted to admit air readily into the tube when air is inhaled therefrom but to restrict the flow of exhal...

A breathing valve of the type having concentric inhalation and exhalation valves has an exhaust passage with tapered inlet ports that provide a variable orifice to minimize flutter. Flutter is further reduced by having the exhalation valve mounted on an unsupported rubber sleeve that can flex to accommodate pressure variations, and by a mushroom inhalation valve that has a U-shaped flex ring with its open end facing the inhalation chamber so that the periphery of the valve lifts as a whole. A mo...

An improved breathing aid device comprises an elongated arched conduit portion and a hollow neck portion extending from one end of the conduit portion and a flange portion located at the end of the neck portion opposite the conduit portion. The device includes a plurality of parallel ribs extending lengthwise within the interior of the conduit portion providing a plurality of channels for guiding a catheter inserted into the device.

A breathing sensor, adapted to be attached to a conduit between a source of breathing gas and an animal, said sensor comprising a substantially vertical conduit having a float therein which is movable in response to breathing of the animal, a sensor for detecting the motion of the float and for actuating, preferably, an audio signal.

An inhalation opening 6 and an exhalation-opening 4 are formed in the facepiece 2 of a breathing apparatus 1 and the openings can be closed with an inhalation valve 8 and exhalation valve 7, respectively. If a person wearing the breathing apparatus 1 inhales, the inhalation valve 8 is open and the exhalation valve 7 is closed. A photointerrupter 11 senses the closing operation of the exhalation valve 7 and supplies electric power to a motor 9 to drive a blower 16.