{
  "abstract": "A door opening and closing robot according to one or more embodiments may include a base; a robot arm connected to the base that includes an arm that is rotatable and a motor that rotates the arm; and a door operating tool that is connected to the robot arm and moves with a rotation of the arm. The robot arm drives the motor to rotate the door operating tool and detects presence of the door based on a change in torque of the motor.",
  "assignees": [
    "KAWASAKI HEAVY IND LTD",
    "KAWASAKI ROBOTICS USA INC"
  ],
  "authors": [
    "ISODA HIDEKI",
    "MIYAZAKI KENICHI",
    "YAMAGUCHI SHUSAKU"
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  "published_at": "2026-09-15T19:05:02.415449Z",
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  "source_date": "2026-03-31",
  "source_id": "US-12589501-B2",
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  "title": "Door opening and closing robot and method of opening and closing door using the same",
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