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:
Mar. 18, 2003
Filed:
Jul. 17, 2001
Akio Hosaka, Sakai-gun, JP;
Sodick Co., Ltd., Kanagawa, JP;
Abstract
A dielectric fluid system ( ) for an electric discharge machining apparatus includes an auxiliary tank ( ) positioned at or higher than a work tank ( ) and a dielectric fluid reservoir ( ), a filter device ( ), and a first pump (P ) and a second pump (P ) upstream and downstream of the filter device . Dielectric fluid in the dielectric fluid reservoir ( ) is filtered by the filter device ( ), and pumped to the auxiliary tank ( ) using the first and second pumps (P ) and (P ). The filtered dielectric fluid is then rapid fed from the auxiliary tank ( ) to the work tank ( ). During electric discharge machining, dielectric fluid is pumped from the work tank ( ), filtered, then cooled and circulated directly back to the work tank ( ). A flushing pipe line and a third pump (P ) may be added into the circulating pipe line. Also, a relief pipe line (K) containing a relief valve (RV) may be provided in parallel with the filter device ( ), and a regulating pipe line (H), connected in parallel with the first pump (P ) and the filter device ( ), may be provided as an effective safety measure.