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US 11,988,238 B2Granted
Bolt and fastening structure
AssigneeAoyama Seisakusho Co., Ltd.
InventorsYuichiro Suzuki, Mitsuki Yoshida, Akihiro Furukawa, Yukinori Fujimoto
Life of this patent
Estimating the term…
Abstract
To threadedly engage a bolt and a female screw with each other, thereby making it possible to shave off a deposit on the inner surface of the female screw and to make it easy for a worker to sense the seating, there is provided a bolt including a shaft 2 and a head, wherein a first thread 11 is provided on a head side of the shaft, and at least one of a thread provided larger in diameter than the first thread and a thread provided wider than the first thread is provided on a tip end side of the shaft.
Claims3
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.
2 more elements
Dependencies are inferred from the claim text.