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, 1981
Filed:
Aug. 07, 1978
Applicant:
Inventors:
Peter Rodrigo, Littleton, CO (US);
Kemener J Whalen, Littleton, CO (US);
David W French, Littleton, CO (US);
Assignee:
Johns-Manville Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 21 ; 285423 ; 285D / ;
Abstract
The bell end of a bell and spigot joint is disclosed herein and includes an end section of a plastic pipe, an axially extending circumferential insert located concentrically within this end section, and a circumferential sealing gasket located within a groove in the inner surface of the insert. A method of making this bell end is also disclosed.