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:
Dec. 01, 2020
Filed:
Oct. 03, 2018
Astra Co., Ltd., Fukushima, JP;
Hirotaka Ichijo, Fukushima, JP;
Masakuni Anada, Fukushima, JP;
Katsuhito Sasahara, Fukushima, JP;
Takahiro Karino, Fukushima, JP;
ASTRA Co., LTD., Fukushima, JP;
Abstract
In an exemplary embodiment, a blade portionis formed by a plurality of bladesbeing arrayed on a front surface of a main body at an even interval while forming blade striation portionsbetween adjacent blades. Each bladeis cut into a circular-arc shape. A pitch between the bladesis in a range of 1 to 3 mm. A recess-portion apex composed of a cut surface of each bladehas a rounded shape with a radius of 1.0 to 3.0 mm. A protrusion-portion apex of the blade striation portionhas a rounded shape with a radius of 0.1 to 0.5 mm. A tip of the bladeformed by the blade striation portionhas a rounded shape with a radius of 0.1 to 0.5 mm.