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Portable ventilator apparatus

  • US 4,807,616 A
  • Filed: 11/12/1987
  • Issued: 02/28/1989
  • Est. Priority Date: 07/09/1987
  • Status: Expired due to Term
First Claim
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1. Ventilator apparatus comprising:

  • a pump including a negative-pressure air inlet and a positive-pressure air outlet;

    delivery means connected to the positive-pressure air outlet for delivering pressurized air to a patient;

    and a relief valve communicating with said delivery means for preventing the pressure in the delivery means from rising above a predetermined peak value;

    characterized in that said apparatus further includes;

    s sensor located in said delivery means between the positive-pressure outlet of the pump and the patient for sensing the positive pressure in said delivery means;

    and control means effective to energize said pump when the sensed positive pressure in the delivery means is below said peak value, and to deenergize the pump whenever the sensed positive pressure is substantially equal to said peak value.

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