Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1987-09-17
1989-10-10
Arnold, Bruce Y.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
72 96, 72100, 72193, B21D 1900
Patent
active
048722502
ABSTRACT:
According to the well known Grob method, there is fabricated on a mandrel provided with outer or external toothing or teeth a substantially dished or pot-shaped hollow body with corresponding inner or internal toothing or teeth. This fabrication operation starts with a blank comprising an at least partial web portion or dish base and a rim portion or dish rim projecting in a substantially tube-like or tubular configuration from the web portion or dish base. As seen in longitudinal section, this blank possesses a rounded or arcuate portion in the transition region or zone between the rim portion or dish rim and the web portion or dish base. This rounded or arcuate portion has a mean radius of curvature which is at least as large as the wall thickness of the rim portion or dish rim of the blank.
REFERENCES:
patent: 3407638 (1968-10-01), Greis et al.
patent: 3473211 (1969-10-01), Lindell
patent: 3543553 (1968-04-01), Marcovitch
patent: 3735618 (1973-05-01), Zook
patent: 3753365 (1973-08-01), Kralowetz
patent: 4094183 (1978-06-01), Mettler
patent: 4116032 (1978-09-01), Krapfenbauer et al.
Arnold Bruce Y.
Ernst GROB AG
Kleeman Werner W.
Shafer R. D.
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