LOWER UNIT OF RESPIRATORY SYSTEM Russian patent published in 2008 - IPC B63C11/16 

FIELD: sport.

SUBSTANCE: lower unit of respiratory system contains common housing for bite-board and air ducts with inspiratory and expiratory limbs, inspired and expired valves. Inspired valve with elastic membrane and frame having seat and radial bridges with central rod to hold membrane is situated in inspiratory limb groove near limb outlet. Expired valve is similar to inspired valve but its frame is situated inside the expiratory limb flush to limb inlet, unit wall and opposite to inspired valve. Bottom part of expired valve frame inlet is situated on the level of common unit housing bottom. Both valve frames are either solid with unit housing or split into separate elements. Expiratory limb is 10÷12 cm long and bent to the side and upwards. It has external screw near outlet to hold expiration conduit end by tightening threaded O-ring washer.

EFFECT: excludes recirculation of expired air.

1 dwg