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. 08, 1993
Filed:
Sep. 10, 1991
Applicant:
Inventor:
Tetsuji Hayashi, La Mirada, CA (US);
Assignee:
Amada Company, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B30B / ;
U.S. Cl.
CPC ...
83 13 ; 83543 ; 836391 ; 91468 ; 100 35 ; 100 53 ; 137 70 ; 192130 ; 192150 ;
Abstract
A method and a device for protecting against a press overload is disclosed whereby, when an excessive pressure which exceeds a specified hydraulic pressure is transmitted to a pressure chamber of a press cylinder, this excessive pressure activates the punching of a shear plate by a shear piston and the excessive pressure is released by the shear piston.