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:
Mar. 27, 1990
Filed:
Feb. 10, 1989
Mark McMaster, Burlington, MA (US);
Barry Wright Corporation, Watertown, MA (US);
Abstract
A force/torque transducer including a first rigid member, a second rigid member, one or more flexural beams connected between the first rigid member and the second rigid member, the first and second members and the beam having a center point, the flexural beams having respective decoupling points that are symmetrical with respect to the center point, the flexural beams having symmetrical strain fields located on the flexural beams such that first and second strain fields achieve strain responses to a load of a single axis of magnitude equal to each other and third and fourth strain fields achieve strain responses to the load of the single axis of magnitude equal to each other, two of the responses being one sign and two being the other sign, the strain responses of the strain fields to loads of all other axes being capable of being cancelled out when the responses of one of the first and second fields and one of the third and fourth fields are given opposite sign and the responses of like axes are added together, strain gauges placed at the first, second, third and fourth strain fields, and a bridge circuit in which the strain gauges are electrically connected to be additive with respect to the load of the single axis and neutral with respect to loads of all other axes, the bridge circuit providing an output that indicates load of the single axis and is decoupled with respect to loads of all other axes.