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. 04, 1991
Filed:
Mar. 23, 1990
Mitsubishi Denki K.K., Tokyo, JP;
Abstract
A machining-liquid injection nozzle unit for use in a traveling-wire EDM apparatus comprises a pair of nozzles disposed opposite to each other through a workpiece and serving to inject a machining liquid individually toward the workpiece while permitting insertion of a wire electrode therethrough in the axial direction thereof coincident with injection of the machining liquid, and a liquid screening member so shaped as to surround the axis of the wire electrode and attached to at least one of the nozzles. The liquid screening member has a low friction coefficient to the workpiece and serves to diminish the lateral force exerted on the fore end of the upper or lower nozzle due to its sliding motion, hence preventing deterioration of the machining precision. The nozzle unit further includes a piston connected to the liquid screening member and capable of producing a predetermined pressure toward the workpiece by the machining liquid in the nozzle. The piston presses the liquid screening member against the workpiece by the constant pressure despite its wear to consequently prevent leakage of the machining liquid while averting reduction of the machining speed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile