Method of making grooved hollow article
First Claim
1. THE METHOD OF FORMING AN OUTWARDLY-OPENING CIRCUMFERENTIAL GROOVE IN A SUBSTANTIALLY TUBULAR WORKPIECE WITH A PRESSURE FORMING TOOL, THE WORKPIECE BEING MOUNTED ON A MANDREL PROVIDED WITH A RELIEF ON ITS OUTER END, COMPRISING THE STEPS OF RESTRAINING THE WORKPIECE AGAINST AXIAL INWARD MOVEMENT ON SAID MANDREL, IMPARTING RELTIVE ROTATION BETWEEN THE WORKPIECE AND THE FORMING TOOL, PRESSING THE FORMING TOOL INTO THE WORKPIECE OVER THE UNREDUCED PORTION OF THE MANDREL AND SPACED INWARDLY FROM THE OUTER END OF THE WORKPIECE, MOVING THE TOOL AXIALLY INWARD TO REDUCE THE WALL THICKNESS OF THE INTERMEDIATE PORTION OF THE WORKPIECE AND CAUSE IT TO EXTRUDE OUTWARDLY AND EXTEND BEYOND THE OUTER END OF THE MANDREL, APPLYING AXIALLY INWARD AND
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Accused Products
16 Citations
1 Claim
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1. THE METHOD OF FORMING AN OUTWARDLY-OPENING CIRCUMFERENTIAL GROOVE IN A SUBSTANTIALLY TUBULAR WORKPIECE WITH A PRESSURE FORMING TOOL, THE WORKPIECE BEING MOUNTED ON A MANDREL PROVIDED WITH A RELIEF ON ITS OUTER END, COMPRISING THE STEPS OF RESTRAINING THE WORKPIECE AGAINST AXIAL INWARD MOVEMENT ON SAID MANDREL, IMPARTING RELTIVE ROTATION BETWEEN THE WORKPIECE AND THE FORMING TOOL, PRESSING THE FORMING TOOL INTO THE WORKPIECE OVER THE UNREDUCED PORTION OF THE MANDREL AND SPACED INWARDLY FROM THE OUTER END OF THE WORKPIECE, MOVING THE TOOL AXIALLY INWARD TO REDUCE THE WALL THICKNESS OF THE INTERMEDIATE PORTION OF THE WORKPIECE AND CAUSE IT TO EXTRUDE OUTWARDLY AND EXTEND BEYOND THE OUTER END OF THE MANDREL, APPLYING AXIALLY INWARD AND
Specification
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- Resources
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Current AssigneeCarl W. Kaesemeyer
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Original AssigneeCarl W. Kaesemeyer
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InventorsKaesemeyer, Carl W.
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Application NumberUS04/332,537Time in Patent Office1,044 DaysField of SearchUS Class Current72/82CPC Class CodesB21D 22/16 over shaping mandrels or fo...B21D 22/18 using tools guided to produ...Y10T 29/49458 Disc splitting to form pull...
