{
  "$type": "site.standard.document",
  "description": "A seat belt device has a gas generator (11) for generating a high pressure gas when the vehicle is in emergency, a cylinder (17) for conducting the high pressure gas from the gas generator, a piston (20) received movably within the cylinder and pressed and moved by the high pressure gas, and a…",
  "path": "/patents/1101451",
  "publishedAt": "2002-09-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60R22/4633",
    "NSK AUTOLIV CO LTD [JP]"
  ],
  "textContent": "A seat belt device has a gas generator (11) for generating a high pressure gas when the vehicle is in emergency, a cylinder (17) for conducting the high pressure gas from the gas generator, a piston (20) received movably within the cylinder and pressed and moved by the high pressure gas, and a drive unit for rotating a winding shaft (4) of a seat belt retractor in a direction of removing the slack of a belt, using the movement of the piston, wherein the pretensioner is employed with an energy absorbing mechanism, for reversely rotating the winding shaft if a tension acting on the belt exceeds a predetermined value after removing the slack of the belt. For facilitating this reverse rotation, a venting mechanism (22a) having a gas passageway for exhausting the high pressure gas from a space filled with the high pressure gas to the outside of the space is provided, wherein at least a part of the gas passageway is expanded as the high pressure gas is exhausted.",
  "title": "Seat belt device"
}