Abstract: A respiratory mask comprises a sealing flange connected to a mask body by a sinusoidal shaped cushioning member. The cushioning member resiliently compresses when the sealing flange is pressed against the face of a wearer to ensure an airtight seal between the sealing flange and the face of the wearer. The cushioning member functions as a spring, compressing to allow the sealing member to better conform to the face of the wearer but resiliently urging the sealing flange outward against the face of the wearer to prevent leaks.

Abstract: A respiratory mask comprises a sealing flange connected to a mask body by a sinusoidal shaped cushioning member. The cushioning member resiliently compresses when the sealing flange is pressed against the face of a wearer to ensure an airtight seal between the sealing flange and the face of the wearer. The cushioning member functions as a spring, compressing to allow the sealing member to better conform to the face of the wearer but resiliently urging the sealing flange outward against the face of the wearer to prevent leaks.

Abstract: A tube seal adaptor for forming a seal around a tube inserted between a respiratory mask and the face of the mask wearer comprises a curved strip of flexible and pliable material having a tacky base and a slotted curved outer surface which curves downward to a relatively sharp angle with the ends of the strip. A slot extends into the curved strip from an outer surface thereof medially between the ends. The slot is sized to receive a feeding tube or the like in such a manner that the material forming the adaptor will seal around the tube when a mask is pressed or pulled against the seal on the wearer's face.

Abstract: A calibration apparatus for checking the accuracy of DLco testing machines includes a pair of syringes mounted side by side in a frame and joined by a valve controlled gas passageway to a coupling adapted to mate with the testing machine. The first syringe receives gas from the testing machine and the second syringe has a chamber from which gas of a known concentration is returned to the testing machine. The chamber of the second syringe is flow connected by a valve to a source of test gas. The gas passageway is constructed in such a manner to reduce dead air space and to allow purging with test gas to eliminate contamination with ambient air or gas of previous tests.

Abstract: A nasal mask configured to be as unobtrusive as possible while providing an air-tight seal around the nose of a wearer comprises a flexible nasal cup having a nasal opening formed by an inner circumferential edge or rim thereof and opening into a nasal chamber. The cup also includes inner and outer sealing flanges extending around the rim for forming an air-tight seal during use. The nasal cup is sized such that, when the nasal cup is positioned over a wearer's nose, the rim generally extends across the wearer's upper lip, around the alae of the nose, and across the dorsum of the nose. Opposite ends of a malleable strip are secured to the outer sealing flange and the strip extends across the portion of the outer sealing flange adapted to be positioned over the nasal dorsum. The strip is manually adjustable so that a user may selectively adjust the shape of the mask about the nose to improve the seal across the nose.

Abstract: An apparatus includes a respiratory mask and a seal. The mask is adapted to encircle the mouth of a user and convey gasses to and from the mouth of a user through a port therein. The seal is a hydrogel seal that is relatively sticky and resilient so as to provide a tight seal between the mask and the user during usage thereof.

Abstract: An improved airflow delivery system wherein a primary conduit extends from a source of a stream of breathable gas to a patient or wearer. The primary conduit is rotatably connected to a manifold positioned on the top of the wearer's head. The manifold distributes the stream of breathable gas through at least two secondary conduits extending on generally opposite sides of the wearer's head to an airflow entrance structure for directing airflow into the nostrils of a wearer. This airflow entrance structure is a nasal mask or alternatively a nasal puff assembly. The secondary conduits are preferably secured to or integrally formed with straps connecting the airflow entrance structure to the manifold and used for securing the device to a user's head.

Abstract: An oral respiratory mouth mask for breath-by-breath ventilatory measurements on humans constructed of silicone or like material. The mouth mask has a curved face sealing flange adapted to sealably engage the user's skin about the mouth and nose including an internal mouth-enclosing chamber having a relatively small dead space within the mask for improved accuracy in ventilatory and metabolism measurements. A direction airflow tubing assembly secured to and in flow communication with the mouth-enclosing chamber operates to effectively direct exhalation products and inhaled air while producing minimum restrictions to normal airflow. The mask is held in a sealed position about a user's mouth by a securing assembly comprising a flexible skull cap, adjustable elastic straps and quick connect fasteners which cooperate with pendulatory eccentric buttons integrally formed on the outer surface of the face mask.

Abstract: A pneumotach apparatus for measuring gas flows comprises a flow head with a passageway and having a plurality of screens positioned in the pasageway to provide a variance in pressure on different sides of one of the screens, a pressure transducer to convert the pressures into a flow value and a display or recorder for conveying the pressure readings to an operator. The apparatus includes improved seals between the screens, improved seals between pressure taps and the screens, improved sealing between a mounting plate for the taps and a housing for the screens, and knife edges on tube adaptors for the housing that are positioned in close proximity to the screens to improve the accuracy of flow measurements taken by the apparatus.