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. 09, 2001
Filed:
Dec. 15, 1997
Harmonic Drive Systems, Inc., Tokyo, JP;
Abstract
A cup-shaped flexible external gear,of a flexed meshing type gear drive,is flexed into an elliptical shape by a wave generator,A first torque detection device,is disposed on a portion of the external gear,for example, on a diaphragm,thereof which has a pair of torque detection elements arranged at an angular interval of 90° around a center axis,Likewise, a second torque detection device,is also disposed, which has a pair of torque detection elements arranged at an angular interval of 90°. The first and second torque detection devices,are arranged at an angular interval of (k×45°) around the center axis,with each other. A torque detection mechanism of this invention synthesizes outputs of the two torque detection devices,thereby realizing a high accurate torque detection with quite few effect of rotational ripple and with high linearity.