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:
May. 28, 1991
Filed:
Jul. 18, 1990
Lars Johanson, Cedar Grove, NJ (US);
Other;
Abstract
A workpiece holding system utilizing an improved vise having jaws that remain parallel with the workpiece and introduce a downward force on the workpiece to retain it against a precision supporting surface with the system of this invention primarily intended for use in holding workpieces on EDM wire machines. Each jaw has a step at the bottom which is significant when used on a wire EDM machine as it provides the ability to 'pick up' the location of the workpiece from four sides. The system includes a dovetail incorporated into the vise with the position of the dovetail being the same regardless of the size of the vise thereby making it possible to use two different vises in a vertical setup to hold elongated workpieces accurately and making it easy to change from one vise to another. A single adjustment block can be used for a number of vises thus reducing the overall cost of the system. The jaws are inclined towards the top providing the ability to spring under pressure to force the workpiece downwardly but once the jaws are parallel with the workpiece, they will not bend any further even under increased pressure thereby holding the workpiece more firmly and accurately. A vertical dovetail adapter has been provided to support more than one vise of different size or the same size and an adjustment block has been provided which has a male dovetail for quick attachment of vises, vertical dovetail adapters and the like.