The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 1980
Filed:
Feb. 05, 1979
Applicant:
Inventor:
Hendrik Majoor, Beverwijk, NL;
Assignee:
Hoogovens Ijmuiden, B.V., Ijmuiden, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
242 / ; 242 741 ;
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.