Seizure prevention bolt
US9664223B2 · kind B2 · utility
0Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2013 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Apr 18, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/047
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is provided a seizure prevention bolt capable of preventing seizure caused by oblique insertion as well as seizure caused by invasion of a foreign matter such as a spatter. An incomplete screw portion having an outer diameter d that is larger than an inner diameter D1 of a female screw and smaller than (D+D1)/2 is formed at a front end of a normal screw portion formed in a bolt shaft over one or more pitches, and a vertical groove for cutting out a foreign matter such as a spatter is formed in the incomplete screw portion. D in the above expression is a nominal diameter of the bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.