US 11,988,238 B2
Bolt and fastening structure
Yuichiro Suzuki, Niwa-Gun (JP); Mitsuki Yoshida, Niwa-Gun (JP); Akihiro Furukawa, Niwa-Gun (JP); and Yukinori Fujimoto, Niwa-Gun (JP)
Assigned to Aoyama Seisakusho Co., Ltd., Niwa-Gun (JP)
Filed by AOYAMA SEISAKUSHO CO., LTD., Niwa-Gun (JP)
Filed on Sep. 21, 2020, as Appl. No. 17/026,480.
Application 17/026,480 is a continuation of application No. PCT/JP2019/018468, filed on May 9, 2019.
Claims priority of application No. 2018-095857 (JP), filed on May 18, 2018.
Prior Publication US 2021/0003163 A1, Jan. 7, 2021
Int. Cl. F16B 35/00 (2006.01); F16B 33/02 (2006.01); F16B 33/00 (2006.01); F16B 33/04 (2006.01)
CPC F16B 33/02 (2013.01) [F16B 35/007 (2013.01); F16B 33/008 (2013.01); F16B 33/04 (2021.08)] 3 Claims
OG exemplary drawing
 
1. A bolt for fastening comprising: a shaft; and
a head having a length in a direction perpendicular to the central axis longer than the diameter of the shaft, wherein
a first thread is provided on a head side of the shaft,
a second thread provided larger in diameter than the first thread and a third thread provided wider than the first thread are provided on a tip end side of the shaft, a diameter of a second thread is larger than a diameter of a third thread and the third thread is provided wider than the second thread, and only the third thread is provided with a notch.