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:
Feb. 12, 2002
Filed:
Aug. 26, 1999
Yutaka Mizuno, Shizuoka-ken, JP;
Nobuo Hara, Shizuoka-ken, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
A load detection device according to this invention has a detection section including a magnetization coil ( ) and a solid rod-like magnetic substance disposed in the axial center of the magnetization coil ( ), the magnetic substance ( ) is magnetized by the magnetization coil ( ), and load (P) is applied directly to the magnetic substance ( ) to produce inductance change, so as to be detected. Therefore, according to this invention, the device is simplified in its construction with a high mechanical strength and a wide dynamic range, capable of effecting smaller size, weight saving and cost reduction, as well as easy handling ability, and suitable for transfer. In addition, the load (P) is detected from inductance change due to change in magnetic permeability of the magnetic substance ( ) caused by the load, so that no displacement is accompanied with detection, providing a structure capable of achieving high direct response and easy adjustment with small hysteresis, and unlikely to be affected magnetically.