{
  "patent_number": "US 3191596",
  "country": "US",
  "title": "How Dr. Forrest Bird's Mechanical Respirator Controls Patient Breathing",
  "original_title": "Respirator",
  "summary": "A 1965 patent describing a mechanical ventilator that automatically switches between inhaling and exhaling based on pressure levels in a patient's airway.",
  "what_it_does": "The device acts as an automated breathing controller that connects a pressurized gas source to a patient's airway. It uses a main valve to toggle between inhalation and exhalation phases. The system monitors the air pressure at the patient's airway; when the pressure hits a specific threshold, the controller automatically closes the valve to end inhalation. If the pressure fails to reach that threshold within a set time, a secondary valve system triggers an additional flow of gas to ensure the patient receives the required volume of air.",
  "what_it_does_not_cover": [
    "Does not cover electronic or microprocessor-based control systems.",
    "Does not cover non-pressure-sensitive ventilation methods.",
    "Does not cover portable manual resuscitation bags (Ambu bags)."
  ],
  "filed": "1960-09-19",
  "granted": "1965-06-29",
  "expires": "1982-06-29",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Forrest M Bird",
      "url": "https://patentbrief.org/inventor/forrest-m-bird"
    },
    {
      "name": "Henry L Pohndorf",
      "url": "https://patentbrief.org/inventor/henry-l-pohndorf"
    }
  ],
  "times_cited": 78,
  "tags": [
    "mechanical",
    "biotech"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/3191596/bird-respirator-ventilator",
  "markdown_url": "https://patentbrief.org/patent/us/3191596/bird-respirator-ventilator/md",
  "google_patents_url": "https://patents.google.com/patent/US3191596",
  "relatedPatents": [
    {
      "patentNumber": "1906844",
      "countryCode": "US",
      "title": "How the Iron Lung Artificial Respirator Works",
      "url": "https://patentbrief.org/patent/us/1906844/iron-lung-respirator-drinker"
    },
    {
      "patentNumber": "5199424",
      "countryCode": "US",
      "title": "How CPAP Machines Gradually Increase Air Pressure for Sleeping Patients",
      "url": "https://patentbrief.org/patent/us/5199424/cpap-sleep-apnea-sullivan"
    },
    {
      "patentNumber": "2485039",
      "countryCode": "US",
      "title": "How the Aqua-Lung Scuba Regulator Works",
      "url": "https://patentbrief.org/patent/us/2485039/aqualung-scuba-cousteau-gagnan"
    },
    {
      "patentNumber": "2702035",
      "countryCode": "US",
      "title": "How the First Heart-Lung Machine Oxygenated Blood",
      "url": "https://patentbrief.org/patent/us/2702035/heart-lung-machine-gibbon"
    },
    {
      "patentNumber": "3552770",
      "countryCode": "US",
      "title": "How Early Vehicle Airbag Safety Systems Work",
      "url": "https://patentbrief.org/patent/us/3552770/automotive-airbag-safety-device"
    }
  ]
}