Title:
NUT
Document Type and Number:
Japanese Patent JP3390155
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nut capable of giving a large rotational resistance to a bolt, certainly preventing this and a bolt fixing an object from loosening, and assuring easy rotating operation of the nut relative to the bolt.
SOLUTION: The nut includes a body 2 and a loosening preventing member 3 installed on the nut body 2. The loosening preventing member 3 is equipped with resilient pieces 32b and 32c, which have a pressing part 33 and a resistance giving part 34 formed spirally. When the nut is engaged with a bolt 100 and rotated, the pressing part 33 abuts to an object H to generate pressing, and accordingly the resistance giving part 34 makes displacement and touches the threads 103 of the bolt 100 to give them a resilient force, and thereby the nut and bolt can certainly be prevented from loosening.
Inventors:
Takayuki Kasahara
Application Number:
JP30146299A
Publication Date:
March 24, 2003
Filing Date:
October 22, 1999
Export Citation:
Assignee:
Fuji Precision Co., Ltd.
International Classes:
F16B39/34; F16B37/00; (IPC1-7): F16B39/34; F16B37/00
Domestic Patent References:
| JP4157032A | ||||
| JP53113958A | ||||
| JP5433941A | ||||
| JP3140610A | ||||
| JP4956369U | ||||
| JP51120462U | ||||
| JP381415U | ||||
| JP115501Y1 | ||||
| JP347510Y1 |
Other References:
【文献】国際公開98/59178(WO,A1)
Attorney, Agent or Firm:
Takenobu Samejima