Threaded fastener and manufacture thereof |
|||||||
| 申请号 | JP17729589 | 申请日 | 1989-07-11 | 公开(公告)号 | JPH02118209A | 公开(公告)日 | 1990-05-02 |
| 申请人 | Rover Group Plc:The; | 发明人 | RARUFU SUCHIYUWAATO EMARII; | ||||
| 摘要 | PURPOSE: To reduce changes of a fixed load at the time of yield by forming at least one groove in the circumferential direction in a handle part so that a generation effective stress area is smaller than the minimum effective stress area of an external screw part and the yield of a threaded fastener occurs at a predetermined load during use. CONSTITUTION: In a threaded fastener 11 including a part having an external screw part 13 and a handle part 12, at least one groove 15 in substantially circumferential direction is formed in the handle part 12, and a depth of the groove 15 is such that an area of effective stress generated by it is smaller than the minimum stress area of the external screw part 13 and the yield of the threaded fastener occurs in a region of each groove at a predetermined and applied load during use. In this way, it is possible to reduce changes of a fixed load generated when the threaded fastener such as a bolt is tightened and yielded. COPYRIGHT: (C)1990,JPO |
||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈