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:
Jun. 24, 2003
Filed:
Sep. 10, 2001
Applicant:
Inventors:
Assignee:
Nambu Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F15B 7/00 ;
U.S. Cl.
CPC ...
F15B 7/00 ;
Abstract
There are provided a pressure intensifying cylinder for allowing a pressure intensifying chamber to communicate with a head-side cylinder chamber of a working cylinder and its control hydraulic circuit. When a load and a rated pressure Pp of a hydraulic pump are balanced with each other at the time of inserting and setting a core a check valve is closed and a sequence valve is opened to move the pressure intensifying cylinder forward, so that the pressure of the head-side cylinder chamber is increased. A pressure intensifying ratio of the pressure intensifying cylinder is set such that the pressure of the head-side cylinder chamber is higher than pressure occurring with molding pressure.