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. 26, 1991
Filed:
Mar. 22, 1990
Applicant:
Inventor:
Yoshiro Nakayama, Aichi, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
219 6912 ; 269 20 ;
Abstract
A core retaining apparatus for a wire-cut electro-discharge machine which is capable of effectively and reliably retaining a core cut out of a workpiece by wire-cut electro-discharge machining when the core is removed to a position outside the machining area. The core retaining apparatus comprises a core retaining element for retaining a core cut out of a workpiece, the element being elastic and having a space therein, and pressure control elements for maintaining the pressure inside the space at a desired value.