Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1976-10-20
1978-01-17
DiPalma, Victor A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29415, 72393, 113116E, B21D 5326
Patent
active
040683621
ABSTRACT:
A method of forming annular rings having portions of the ring material disposed radially of the ring axis from strips of flat material by forming cylindrical workpieces from elongated strips of material with the ends of each of the strip being welded together to form an endless cylindrical workpiece having its material extending axially of the ring and displacing a portion intermediate internal annular edge portions of the workpiece radially outwardly while the outer perimeter of the workpiece is unsupported. When the finished annular ring is to have all of the material in the annular edge portions extending radially, the inner annular edge portions are unsupported and when the annular edge portions are to extend axially in the finished ring, only the spaced inner annular surfaces of the edge portions are supported.
REFERENCES:
patent: 2089476 (1937-08-01), Grotnes
patent: 3001496 (1961-09-01), Lyon
patent: 3006691 (1961-10-01), Lyon
patent: 3757401 (1973-09-01), Beisch
patent: 3798728 (1974-03-01), Beisch
patent: 3952575 (1976-04-01), Straza et al.
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