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:
Aug. 09, 1994
Filed:
Dec. 16, 1992
Kazuo Hiraoka, Chiba, JP;
Abstract
A pressure feedback system for limiting pressure and a minor feedback system connected to the pressure feedback system are used as a speed feedback system for controlling an injection speed. Consequently, the injection speed is controlled on the basis of an injection speed setting signal using the minor feedback system, and a filling pressure is controlled on the basis of a limit pressure setting signal using the pressure feedback system for limiting pressure. Also, a switch for selectively activating the pressure feedback system and a comparator for comparing the limit pressure setting signal with a filling pressure detection signal are provided within the pressure feedback system. The switch activates the pressure feedback system when the filling pressure detection signal is equal to or larger than the limit pressure setting signal. A normal injection speed control operation is performed until the switch activates the pressure feedback system. After the connection of the switch, a control operation in which the filling pressure is limited is performed until the dwelling process begins.