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:
Jun. 03, 1986
Filed:
Apr. 28, 1982
Elmer D Mannherz, Southampton, PA (US);
Fischer & Porter, Warminster, PA (US);
Abstract
A technique for stabilizing an insulating liner formed of thermoplastic material which is injection molded onto the inner surface of a metal spool having a cylindrical body provided with end flanges, an annular gap being created between the liner and the spool body due to differential shrinkage between the liner and the body as the molded liner cools and solidifies. In order to fill this gap to prevent a change in the inner diameter of the liner when the liner is subjected to the pressure of a fluid flowing therethrough, the spool body is provided with ports which extend between the exterior and interior surfaces thereof. These ports are sealed during the injection-molding process by removable plugs. After injection-molding, the plugs are removed and a thermosetting resin is introduced into one of the ports until the gap is filled as evidenced by the fact that the resin begins to rise in the other ports, the resin then being cured to solidify the filler.