Abstract: Masks for various uses and methods for manufacture thereof, including masks for use in continuous positive air pressure (CPAP) therapies. An example includes a mask having a first, relatively softer material for contact with the face of the user, and a second, relatively harder or more structural material used away from the face of the user, with a gradient therebetween. The mask can be produced by additive manufacturing to avoid a discernible boundary between the first and second materials.

Abstract: Masks for various uses and methods for manufacture thereof, including masks for use in continuous positive air pressure (CPAP) therapies. An example includes a mask having a first, relatively softer material for contact with the face of the user, and a second, relatively harder or more structural material used away from the face of the user, with a gradient therebetween. The mask can be produced by additive manufacturing to avoid a discernible boundary between the first and second materials. The mask may include a foam element, which can be removable for replacement in some examples, for contacting the patient's skin.

Abstract: A collar for prevention of sleep apnea is disclosed. An illustrative collar includes upper and lower portions to provide a comfortable and generally air-sealed interface to the upper neck and jaw, and lower neck and chest, respectively, of the patient. In between, an intermediate section defines a chamber over the anterior neck to which negative pressure is applied, drawing tissue forward and away from the patient's airway, improving air flow for the patient and preventing sleep apnea.

Abstract: Masks for various uses and methods for manufacture thereof, including masks for use in continuous positive air pressure (CPAP) therapies. An example includes a mask having a first, relatively softer material for contact with the face of the user, and a second, relatively harder or more structural material used away from the face of the user, with a gradient therebetween. The mask can be produced by additive manufacturing to avoid a discernible boundary between the first and second materials. The mask may include a foam element, which can be removable for replacement in some examples, for contacting the patient's skin.

Abstract: Masks for various uses and methods for manufacture thereof, including masks for use in continuous positive air pressure (CPAP) therapies. An example includes a mask having a first, relatively softer material for contact with the face of the user, and a second, relatively harder or more structural material used away from the face of the user, with a gradient therebetween. The mask can be produced by additive manufacturing to avoid a discernible boundary between the first and second materials.

Abstract: A Signal Activated Door Hinge is typically a three-hinge door's central hinge. The lower part of the hinge plates attaches to an upper sprocket pinned to a lower sprocket which supports a central drop shaft extending to the bottom of the cover tube. An annular drop weight slides on the drop shaft, latching to a pivoted release lever near the drop shaft top. A bi-metallic muscle wire controls the pivoted release lever. As electric signal reaches the muscle wire, the release lever rotates away from the drop weight which unlatches and slides down the drop shaft under gravity, impacting the bottom of the drop shaft and pulling it down to open the sprocket connections. A coiled spiral activation spring inside the upper sprocket unwinds, rotating a hinge plate. To reset, the signal is canceled and the drop weight raised to the latched position in the release lever.