Internal pipe bending mandrel

Details Internal pipe bending mandrel Internal pipe bending mandrel

1974-12-20

1976-06-22

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

B21D 900

Patent

active

039642909

ABSTRACT:
Internal pipe bending mandrel, which is expanded to fit tightly within the pipe and to support the pipe walls by plural sets of lever actuated jack means at opposite sides of the apparatus. The plural sets of jack means are spaced along the length of the apparatus, and are actuated simultaneously.

REFERENCES:
patent: 3274817 (1966-09-01), Anderson
patent: 3747394 (1973-07-01), Cunningham
patent: 3851519 (1974-12-01), Calvin et al.

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