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:
Nov. 02, 2004
Filed:
Jun. 18, 2002
Vittorio Sgrignuoli, Bologna, IT;
Pelliconi International Machinery S.p.A., Bologna, IT;
Abstract
A rolling head for a resistance seam welding machine comprises a stator; an annular electrode constituting the rotor rotatably mounted on the stator; a device for conducting electricity through a sliding contact, positioned between the stator and the rotor and pressed in axial direction against at least one of them by an elastic force; and conduits through which a coolant flows in the stator, in the rotor and in the sliding contact conductive device. The electrical conductive device comprises elastically yielding elements, forming a radial effect sector shaped and/or made in various different ways, positioned between the stator and the rotor and designed to remain permanently in contact with the stator and the rotor so as to conduct electrical current from one to the other.