Expander for thin walled metal pipe

Metal deforming – By relatively receding work-engaging tool-faces

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Details

B21D 3104

Patent

active

048627240

ABSTRACT:
An expander to repair elongate thin walled pipes or tubes of larger diameter is disclosed. Similar elongate expander beams are pivotally interconnected by plural, parallel articulating links for motion toward and away from each other. One of the beams is longer than the other and carries a hitch structure that is attachable to the ordinary three-point hitch of a wheeled tractor for locomotion, positioning, and powering of the expander. Hydraulic linkage communicates angularly between the expander beams to move them toward and away from each other for use.

REFERENCES:
patent: 2916076 (1959-12-01), Young
patent: 3710609 (1973-01-01), Jones
patent: 3934448 (1976-01-01), Hand
patent: 4803881 (1989-02-01), Dudley

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