DEVICE FOR PROTECTING RESPIRATORY APPARATUS Russian patent published in 2005 - IPC

FIELD: medical engineering.

SUBSTANCE: device has half-mask manufactured from filtering material having reinforcing members, squeezing nose plate and fastening members. Lower half-mask base is shaped as isosceles triangle having convex sides. Triangle side chord length ratio is selected as 1.2:1:1 The greater triangle side has sealed squeezing nose plate in its middle part and welt obturator placed before welding seam and two other sides have canals formed by intermittent welding parallel seams connecting two layers of the half-mask for flexible fastening members to pass through and narrow welts before the seams. The reinforcing members of the half-mask are manufactured as ribs thermally formed along cone generatrix. The half-mask has two regulators for adjusting half-mask dimensions manufactured as squeezing collars set over canal inlet openings for fitting flexible fastening member formed with narrow canal parts as a result of thickening welding seams and fastening member tension control unit designed as elastic bushing.

EFFECT: improved sealing conditions; wide range of functional applications.

2 cl, 6 dwg