| 摘要 |
The collar has a substantially cylindrical metal belt (16) and at least one pair of lugs (18, 20) that project relative to said belt and that define a tightening space (22) between them. It also has tightening equipment for bringing the lugs together. Each of the lugs (18, 20) has an extension (19, 21) that is folded back towards the back of said lug, away from the other lug, and that is provided with a hole (22B, 23B) for receiving the tightening rod (24) and the tightening equipment, which hole is situated facing a hole (22A, 23A) in the front portion of the same lug. A bracing space (26, 27) is provided between the folded-back extension and said front portion. Each of the holes (22B, 22A) in the extension (19) and in the front portion (18A) has an edge portion provided with a visor (26B, 26A, 27A) that extends into the bracing space (26, 27), and an edge portion that is not provided with a visor and that extends facing the visor of the other hole. Advantageously, the front portion of each of the lugs has a concave shape over the entire height of the holes. |
