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, 1982
Filed:
Sep. 11, 1981
Applicant:
Inventor:
Vernon R Fencl, Northbrook, IL (US);
Assignee:
Grotnes Metalforming Systems, Inc., Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
318 50 ; 318 98 ; 318112 ;
Abstract
An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed ratio between the forming rolls in the absence of a working load thereon. The control system further maintains a predetermined torque ratio between the outputs of the drives for the forming rolls during the forming of a wheel rim by the forming rolls.