Expandable and contractible coiler mandrel

Details Expandable and contractible coiler mandrel Expandable and contractible coiler mandrel

2006-03-29

2008-11-25

Banks, Derris H. (Department: 3725)

Metal deforming

By deflecting successively-presented portions of work during...

To form spiral coil

C072S043000

Reexamination Certificate

active

07454937

ABSTRACT:
An expandable and contractible coiler mandrel for coiling metal strip, including: a rotatably supported coiler mandrel shaft with a wedge surface on its outer circumference; cooperating segments, which have an outer circumference with a coiling surface for the strip, and which have an opposing wedge surface cooperating with the wedge surface of the mandrel shaft in their end region facing away from the coiling surface; a mechanism for shifting the segments relative to an axial direction of the mandrel shaft; and a supply system for conveying lubricant to coiler mandrel regions that require lubrication. The supply system is connected with a lubricant pump having an actuating element for pumping, such that the pump is connected with the shifting mechanism or with the mandrel shaft, and the actuating element is connected with the other of the mandrel shaft or the shifting mechanism whereby pumping occurs only when the shifting mechanism is actuated.

REFERENCES:
patent: 2578953 (1951-12-01), Tyrrell
patent: 3754720 (1973-08-01), Gross et al.
patent: 4213577 (1980-07-01), Majoor
patent: 5524465 (1996-06-01), Kajiwara et al.
patent: 20 32 542 (1971-01-01), None
patent: 103 47 262 (2004-10-01), None
patent: 0 722 791 (1996-07-01), None
patent: 2004/037456 (2004-05-01), None
Patent Abstracts of Japan, BD. 005, No. 029, (M-056), Feb. 21, 1981 & JP 55 156149 A (Hitachi Ltd), Dec. 4, 1980.

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