| 摘要 |
PCT No. PCT/SE88/00380 Sec. 371 Date Feb. 13, 1990 Sec. 102(e) Date Feb. 13, 1990 PCT Filed Jul. 14, 1988 PCT Pub. No. WO89/00874 PCT Pub. Date Feb. 9, 1989.A respiratory mask supplies air to a user from an external air source. The mask includes a face shield which sealingly engages the user's cheeks at the sides. The top of the face shield is open. The bottom is fixed to a pliable air hose having a U-shape, which sealingly engages the user's face just below the lower lip. Nozzles in the pliable air hose direct air upward into the mask. Another air hose connected to the U-shaped air hose extends away from the mask and connects to the external air source. |
