Rigid helmet for e.g. protecting blood circulation of brain, has mouth piece connected with external air, where helmet is manufactured from transparent plastic and sealed with flexible sealing band against shoulder, neck and chest

摘要

The helmet (2) has a mouth piece (4) that is connected with an external air. The helmet is manufactured from a transparent plastic, and is sealed with a flexible sealing band (3) against shoulder, neck and chest of a person. The helmet covers a whole head (1) of the person, and the helmet has a pump or a blower for producing a low pressure in the helmet.