Patent ID: 7060041
Filing Date: 2006-06-13
Classification: A61H

Abstract:
1. Apparatus for applying compressions to the chest of a patient to stimulate blood circulation, comprising: an energized compressor assembly which includes an actuator and a source of pressured fluid; a torso wrap that couples to said actuator and that wraps to the back of the patient, so downward forces of the piston against the patient's chest are withstood by upward forces applied to the patient's back; said actuator includes a cylinder which has an inside surface and a piston with a plurality of telescoping piston parts that telescope in one another and that are exposed to pressured fluid in said cylinder, including an upper piston part that fits closely in said cylinder and a lowermost piston part, and including a pressing member on a lower end of said lowermost piston part for pressing against the patient's chest; said lowermost piston part having a lower piston inside surface which is exposed to said pressured fluid and which has at least half the diameter of said inside surface of said cylinder.