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. 02, 1986
Filed:
Nov. 30, 1983
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A load weight calculating system for a load moving machine, such as a hydraulic excavator, including a support, and a front attachment pivotably supported by the support. The front attachment includes a first linkage element pivotably supported by the support, a second linkage element pivotably supported by the first linkage element, a loading section supported by the second linkage element, and first and second hydraulic actuators for moving the first and second linkage elements, respectively. The load weight calculating system includes a first displacement detector and a second displacement detector for obtaining displacements .alpha..sub.1 and .beta..sub.1 of at least the first and second linkage elements, respectively, a pressing force sensor for obtaining a pressing force K.sub.1 exerted by at least one of the first and second hydraulic actuators, a weight calculating unit for calculating the weight of a load carried by the loading section based on the values .alpha..sub.1, .beta..sub.1 and K.sub.1 obtained at least by the first and second displacement detector and pressing force sensor, and a weight indicating unit for indicating a value associated with the load weight obtained by the weight calculating unit.