Patent ID: 6443151
Filing Date: 2002-09-03
Classification: A61M

Abstract:
A triggering mechanism comprising:a) a housing, having proximal and distal ends; b) a piston slidably disposed within said housing, said piston comprising proximal and distal ends and an orifice, wherein said piston is adapted to slidably house a plug means, wherein said housing and an inner surface of said piston together define a fluid channel having an inlet in said piston proximal end, and an outlet in said housing distal end; c) a resistance means which abuts said piston distal end, for positioning said piston near the proximal end of said housing, wherein said resistance means prevents said piston from moving toward the distal end of said housing until air velocity passing through said piston orifice exceeds a predetermined threshold; d) a plug means disposed within said piston; and e) a trigger signal means, wherein elements (a) through (e) are configured in such a way that passage of air having sufficient velocity through said piston orifice moves said piston toward the housing distal end, thereby actuating said trigger signal means.