Patent ID: 6290681
Filing Date: 2001-09-18
Classification: A61M,G01P,Y10S

Abstract:
A fluid flow monitoring device comprising:a transparent fluid conducting means enclosing a stem body movable along the fluid conducting means and biased against a proximal interior shoulder of the fluid conducting means, said shoulder defining a fluid inlet; anda signal emitter-sensor means positioned externally to the fluid conducting means for transmitting a signal across the fluid conducting means from an emitter of the emitter-sensor means, to a sensor of the emitter-sensor means, such that with the stem body in a first stem body position within the fluid conducting means, the signal is blocked, and with the stem body in a second stem body position within the fluid conducting means, the signal is not blocked, said second stem body position adapted by the stem body as a result of a fluid flow within the conducting means wherein the fluid flow is sensed by the emitter-sensor means as the stem body moves.