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:
Mar. 31, 1998
Filed:
Aug. 29, 1996
Applicant:
Inventors:
Larry Paul Prater, Taylor, MI (US);
Richard Paul Stoynoff, Woodhaven, MI (US);
Assignee:
Livernois Research & Development Company, Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72187 ; 72196 ;
Abstract
An apparatus for roll forming convoluted springs in which a tempered steel strip is fed between a pair of forming rolls which produce a continuous convoluted steel strip. A compression mechanism downstream of the pair of forming rolls compresses the continuous convoluted steel strip to set the angular relationship of the adjacent legs of the convoluted steel strip. A cut-off mechanism disposed downstream of the compression mechanism device severs from the convoluted strip individual convoluted springs having a predetermined number of convolutions and desired spring characteristics.