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:
Apr. 07, 1987
Filed:
Mar. 22, 1985
Applicant:
Inventor:
John H Schemel, Kennewick, WA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72208 ; 72214 ; 279 / ; 279102 ;
Abstract
A method and apparatus for producing tubing from hollows or workpieces which are in the form of tubes having greater wall thickness than the finished tubes. The method is carried out upon a mill of the general type known as a McKay rocker. The mandrel is allowed to float in the hollow by being restrained at the rocker crosshead by friction rather than a positive locking device. The rocking is permitted with the mandrel sliding in the crosshead so as to reduce high tensile forces which could otherwise cause mandrel failure.