The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2022
Filed:
Mar. 31, 2017
Koki Holdings Co., Ltd., Tokyo, JP;
Masaya Nagao, Ibaraki, JP;
Koki Holdings Co., Ltd., Tokyo, JP;
Abstract
A fastening tool is provided, wherein a relief valve piston () is arranged that blocks an air passage from an air plug () to an accumulator chamber () and that opens/closes a flow path of a discharge port of compressed air from the accumulator chamber () to the atmosphere. When a state in which a trigger lever () is pulled while a push lever is released continues for a prescribed time or longer, a portion of the compressed air in the accumulator chamber () is released to the outside from the discharge port to notify the operator that the trigger lever () has not returned. If the trigger lever () is not returned even after the notification, the compressed air in the accumulator chamber () is discharged to the atmosphere at once and an air passage from an air plug () to the accumulator chamber () is blocked.