{
  "$type": "site.standard.document",
  "description": "According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.",
  "path": "/patents/1366436",
  "publishedAt": "2024-07-11T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F16F1/042",
    "NHK SPRING CO., LTD."
  ],
  "textContent": "According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.",
  "title": "COIL SPRING, SUSPENSION DEVICE, AND METHOD FOR PRODUCING COIL SPRING"
}