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. 30, 1988
Filed:
Sep. 10, 1986
Kiyoshi Inoue, Tokyo, JP;
Inoue-Japax Research Incorporated, Kanagawa, JP;
Abstract
An EDM method and system in which a DC output is pulsed to produce a succession of discrete, time-spaced, essentially unidirectional current pulses of a short duration not in excess of 10 microseconds for finish-machining a workpiece with a tool electrode across a fluid flooded EDM gap, each of the discrete current pulses having an essentially half-cycle sinusoidally rising and falling current-time characteristic and a peak current in excess of a predetermined current level. According to the invention, a peak current portion of each of the current pulses beyond the predetermined level is clipped to produce a reformed gap current pulse which is substantially square- or trapezoid-edged and has the predetermined current level.