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. 31, 2017
Filed:
Dec. 22, 2014
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
Mikihiko Tsunoda, Gunma, JP;
Tamotsu Oumi, Gunma, JP;
NSK Ltd., Tokyo, JP;
Abstract
In a torque sensor of an electric power steering device, a natural and comfortable feeling to a driver (driver) is achieved by increasing the physical quantity of the torque sensor around the center of the steering wheel (neutral position). A torsion bar () for use in the torque sensor includes a core torsion bar (A) and a tubular torsion bar (B). The tubular torsion bar (B) includes a pair of torsion tubular bar parts (Ba,Bb), accommodates the core torsion bar (A) in its inside, secures both ends of the core torsion bar (A) in its inside, and the pair of tubular torsion parts (Ba,Bb) mesh and couple each other by meshing teeth, when the core torsion bar (A) twists a predefined rotational angle, so that a single torsion bar is configured. The elasticity of the tubular torsion bar (B) is larger than that of the core torsion bar (A).