Expandable coiler mandrel

Details Expandable coiler mandrel Expandable coiler mandrel

1979-02-05

1980-07-22

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 741, B65H 7524

Patent

active

042135770

ABSTRACT:
An expandable coiler mandrel has a core, radially movable segments around the core and hydraulic pistons to move the segments outwardly. To provide a mandrel in which all movements are actuated hydraulically, and in which tilting of the segments during expansion is avoided, the segments are secured to the pistons which are annular and mounted around pins having heads to limit the movement of the segments. The pistons can be urged in either direction by hydraulic fluid, to expand and retract the mandrel. Fluid for expansion is supplied by pressure cylinders. The pistons associated with a single segment are actuated by at least two of the pressure cylinders.

REFERENCES:
patent: 2321146 (1943-06-01), Jones
patent: 4147312 (1979-04-01), Secor

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