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:
Apr. 05, 1994
Filed:
Mar. 09, 1993
Norihiro Iwamoto, Zama, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
An injection speed control valve for controlling the speed of flow of operating fluid from an operating fluid source of the die-casting machine to an injection cylinder, a pressure compensation valve for controlling the pressure of the operating fluid to a predetermined differential valve pressure to be coupled to the injection speed control valve, a bypass duct communicating the operating fluid source and the injection speed control valve, a logic valve for on-off controlling the flow of the operating fluid through the bypass duct, and a solenoid valve for on-off operating the logic valve, are provided. The speed of injection by the injection cylinder is controlled by switching the logic valve with the solenoid valve while maintaining a predetermined opening degree of the injection speed control valve.