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. 20, 2001
Filed:
Feb. 10, 1998
Mitsubushi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A method by which an operation characteristic of a proportional electromagnetic control valve can be automatically measured in a short period of time. For this purpose, in the operation characteristic measuring method of the present invention, when the proportional electromagnetic control valve to be measured is a proportional electromagnetic pressure control valve, at each step for measuring a pressure of a hydraulic circuit, the pressure is measured with a predetermined interval of time, the pressure is assumed to be stabilized at a point of time when a difference &Dgr;P between the measured pressure value and the previously measured pressure value becomes a predeterminied level or less, and the measured pressure value at this point of time is employed as a pressure corresponding to a load current at this step. The present invention is used at the time when an injection molding machine is inspected at its manufacturing site upon shipping and at the time when the injection molding machine is controlled while being actually operated.