{
  "patent_number": "US 3043625",
  "country": "US",
  "title": "How the Modern Three-Point Car Seatbelt Works",
  "original_title": "Safety belt",
  "summary": "The foundational 1959 patent for the three-point seatbelt, which secures both the torso and lap to prevent injury during vehicle collisions.",
  "what_it_does": "This patent describes a restraint system that uses a single continuous strap to form both a lap belt and a diagonal shoulder belt. The system anchors at three specific points: two on the floor and one on the door pillar. By pulling the strap across the chest and hips, it distributes the force of a sudden stop across the strongest parts of the human body, such as the pelvis and ribcage, rather than focusing pressure on the soft abdomen.",
  "what_it_does_not_cover": [
    "Does not cover two-point lap-only belts common in early aviation or older cars.",
    "Does not cover automatic motorized seatbelt systems that move along a track.",
    "Does not cover airbag deployment systems or their integration with belts.",
    "Does not cover child-specific restraint systems like five-point harnesses."
  ],
  "filed": "1959-08-17",
  "granted": "1962-07-10",
  "expires": "1979-08-17",
  "status": "expired",
  "holder": "Volvo AB",
  "holder_url": "https://patentbrief.org/company/volvo-ab",
  "inventors": [
    {
      "name": "Bohlin Nils Ivar",
      "url": "https://patentbrief.org/inventor/bohlin-nils-ivar"
    }
  ],
  "times_cited": 17,
  "tags": [
    "automotive",
    "mechanical"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/3043625/three-point-seatbelt",
  "markdown_url": "https://patentbrief.org/patent/us/3043625/three-point-seatbelt/md",
  "google_patents_url": "https://patents.google.com/patent/US3043625",
  "relatedPatents": [
    {
      "patentNumber": "3552770",
      "countryCode": "US",
      "title": "How Early Vehicle Airbag Safety Systems Work",
      "url": "https://patentbrief.org/patent/us/3552770/automotive-airbag-safety-device"
    },
    {
      "patentNumber": "1462456",
      "countryCode": "US",
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      "url": "https://patentbrief.org/patent/us/1462456/free-fall-parachute-smith-irvin"
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      "patentNumber": "31128",
      "countryCode": "US",
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    },
    {
      "patentNumber": "1475024",
      "countryCode": "US",
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      "url": "https://patentbrief.org/patent/us/1475024/traffic-signal-morgan"
    },
    {
      "patentNumber": "387571",
      "countryCode": "US",
      "title": "How the Revolving Door Was Invented",
      "url": "https://patentbrief.org/patent/us/387571/revolving-door-van-kannel"
    }
  ]
}