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:
May. 28, 2024
Filed:
Aug. 31, 2018
Koki Holdings Co., Ltd., Tokyo, JP;
Kengo Tamura, Hitachinaka, JP;
Junichi Toukairin, Hitachinaka, JP;
Yoshihiro Komuro, Hitachinaka, JP;
KOKI HOLDINGS CO., LTD., Tokyo, JP;
Abstract
An electric tool to restrain stress concentration is provided. The electric tool includes a housing (), a motor (), an anvil (), and an impact mechanism (). The motor is accommodated in the housing and rotatable. The anvil supported by the housing and rotatable about an axis (A). The impact mechanism is configured to convert a rotational force generated by the motor into a rotational impact force about the axis, and to apply the rotational impact force to the anvil. The anvil includes a base portion (), an end bit attachment portion (), and a connecting portion (). The base portion is rotatably supported by the housing. An end bit is attachable to the end bit attachment portion. The end bit attachment portion has a flat surface portion. The connecting portion integrally connects together the base portion and the end bit attachment portion. The connecting portion has a diameter gradually reduced in a direction from the base portion toward the end bit attachment portion. The connecting portion is formed with a recessed portion (A,B,). The connecting portion has an outer peripheral surface portion where the recessed portion is formed. The recessed portion is recessed, in an axial direction from the end bit attachment portion toward the base portion, from a point where the recessed portion is connected to the outer peripheral surface portion in a cross-section taken along a plane parallel to the flat surface portion and passing through the recessed portion.