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:
Sep. 21, 1993
Filed:
Apr. 01, 1992
Applicant:
Inventors:
Robert Rung, Hopatcong, NJ (US);
Douglas R Dole, Whitehouse Station, NJ (US);
Assignee:
Victaulic Company of America, Easton, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 55 ; 285112 ; 2853822 ; 285424 ; 138109 ; 72105 ;
Abstract
A roll grooved pipe is provided on its inner surface with a hydrofoil surface providing a transition between the inner surface of the pipe and the radially innermost portion of a radially inwardly extending step formed in the inner wall of the pipe by the cold rolling of the groove in the pipe.