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Enhanced chest compressor

  • US 8,790,285 B2
  • Filed: 05/18/2007
  • Issued: 07/29/2014
  • Est. Priority Date: 05/18/2007
  • Status: Active Grant
First Claim
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1. Apparatus for use by an emergency worker for applying compressions to the chest of a patient to enhance breathing and blood circulation, which comprises:

  • a cylinder (12) and a piston (14) that is movable in the cylinder in repeated upstrokes away from the patient, including;

    a spring (60) that engages said piston, to slow its downward movement and reduce its downward force and reverse piston movement, only when the piston has completed at least two-thirds of its downstroke, said spring having a sufficient diameter to not only slow piston downward movement but to help reverse piston movement to begin an upstroke.

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