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:
Dec. 03, 1984
Applicant:
Inventors:
Liggett A Cothran, Clyde, NC (US);
Edward L Morgan, Ashville, NC (US);
Robert E Stevens, Kettering, OH (US);
Homer N Holden, Sylva, NC (US);
R Neal Ensley, Waynesville, NC (US);
Assignee:
Dayco Products, Inc., Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
264508 ; 83 54 ; 138121 ; 264154 ; 428 36 ;
Abstract
A method of making blow-molded perforated tubing and the tubing made by said method is provided. In the method of the invention, hollow-walled protuberances are blow molded into the side of the tubing as the tubing is formed and perforations are formed by cutting the hollow-walled protuberances.