PHONENDOSCOPE Russian patent published in 1999 - IPC

FIELD: medical engineering. SUBSTANCE: phonendoscope has acoustic tubes with olives, headband springs, sound ducts coupled to head body via branch pipe, and funnels. Branch pipe channel accommodates switch which has at least one moving element with channels. Moving element is mounted in phonendoscope head for movement about its longitudinal axis, for reciprocating motion or for combined reciprocating and rotary motions. Funnels are secured to moving element ends. EFFECT: simplified adjustment for operation, enhanced reliability. 1 cl, 13 dwg