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. 14, 2009
Filed:
Jun. 16, 2005
Giuseppe Bordignon, Bicinicco, IT;
Ivan Paiaro, Ronchi dei Legionari, IT;
Andrea DE Luca, Remanzacco, IT;
Alfredo Poloni, Fogliano Redipuglia, IT;
Giuseppe Bordignon, Bicinicco, IT;
Ivan Paiaro, Ronchi dei Legionari, IT;
Andrea De Luca, Remanzacco, IT;
Alfredo Poloni, Fogliano Redipuglia, IT;
Danieli & C. Officine Meccanicite S.p.A., Buitrio, IT;
Abstract
A bar speed changing device () comprising a pair of upper rollers () and a pair of lower rollers (). Said device receives a bar section with the rollers () in the open position and rotating at a given speed. Upon leaving the device () said sections are fed into axially arranged peripheral seats () of rotating drum channels. Control devices calculate the speed at which the bar section must be released, upon completion of the braking action, according to the position that said section must occupy in one of said seats and on the basis of the bar-seat friction coefficient. When the rollers () receive the bar, they turn at the calculated release speed. At a predefined moment, such to enable braking in the correct space and time, the four rollers close on the section and exert the braking action, exploiting the dynamic friction between the roller-section.