Pipe bending mandrel

Details Pipe bending mandrel Pipe bending mandrel

1977-01-24

1978-05-09

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

269 481, B21D 900

Patent

active

040880079

ABSTRACT:
Pipe bending mandrel wherein oppositely disposed pipe wall engaging elements are connected to a drive unit at one end by toggle elements permitting inward and outward movements of the pipe wall engaging elements, and wherein said pipe wall engaging elements are connected to a longitudinal axial shaft of the drive unit by plural axially spaced toggle elements which move the pipe wall engaging elements inwardly or outwardly upon reciprocating movements of the shaft in opposite directions.

REFERENCES:
patent: 3043361 (1962-07-01), Kelso
patent: 3274817 (1966-09-01), Anderson
patent: 3747394 (1963-07-01), Cunningham
patent: 3964290 (1976-06-01), Auxer

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