Patent ID: 8579873
Filing Date: 2013-11-12
Classification: A61F,A61M

Abstract:
1. A drainage device, comprising: a substantially hollow outer cylinder having at least a first side and a second side; a first opening disposed in the first side of the outer cylinder; an inlet tube disposed in fluid communication with the first opening; a second opening disposed in the second side of the outer cylinder; an outlet tube disposed in fluid communication with the second opening; a valve piston, disposed within the outer cylinder and moveable between a first position and a second position; a biasing means disposed between the a valve piston and the outer cylinder, whereby the biasing means biases the inner cylinder into the second position; and a through-channel disposed within the valve piston wherein the through-channel is oriented perpendicular to the longitudinal axis of the valve piston; wherein the through-channel is in fluid communication with the first opening and the second opening disposed on the sides of the outer cylinder when the a valve piston is in the first position; and wherein the through-channel is occluded by the outer cylinder when the inner cylinder is in the second position.