FIELD: medicine. SUBSTANCE: device is made in form of outer and inner wire frames, intermediate shell located between frames, and means for creating alternating pressure. Frames members are welded to each other. Intermediate shell is made of flexible material. Attached to inner frame is inlet. Sealing is made in form of two flexible collars secured to inlet. One collar faces hollow of small pressure chamber with its free end, and the other collar is directed to main pressure chamber hollow. EFFECT: higher efficiency. 3 dwg
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Authors
Dates
1994-03-15—Published
1991-07-02—Filed