Plastic coating for pipe couplings
AssigneeDresser Industries, Inc.
InventorKenneth E. Rakieski
Life of this patent
Estimating the term…
Abstract
An improved method of coating a pipe coupling with a corrosion resistant polymeric coating includes coating an entire coupling, then simultaneously forming an upstanding flange on the coupling body when, in the parting process, the body and nut are separated. The improved coupling is adapted to utilize a moisture barrier between thee nut and the flange.
Claims7
An improved plastic coated pipe coupling, the improvement comprising:
- a coupling nut having an end face and an exterior plastic coating, the coating forming an integral collar;
- a coupling body having a plastic coating, the body coating having an integral upstanding flange, the body threadedly engaging said nut;
- and
- a resilient annular moisture barrier adhered to said integral upstanding flange and engaging the plastic coating on the coupling nut at the end face of the coupling nut.
An improved plastic coated pipe coupling, the improvement comprising:
- a threaded metallic coupling nut having an end face and polymer coating having an integral collar thereon;
- a threaded metallic body having a plastic coating with an integral upstanding flange thereon, the flange having at least one face perpendicular to the axis of the body, the body threadedly engaging the nut;
- a resilient annular moisture barrier having a face of thin polymeric abrasion resistant and anti-frictional material;
- and
- the flange and end face adapted to engage the moisture barrier therebetween.
An improved plastic coated pipe coupling, the improvement comprising:
- a threaded metallic coupling nut having an end face and an exterior polymeric coating, the end face being uncoated;
- a threaded metallic body having a plastic coating with an integral upstanding flange formed thereon, the flange having at least one face perpendicular to the axis of the body, the body threadedly engaging the nut;
- a resilient annular moisture barrier;
- the flange and end face adapted to engage the moisture barrier therebetween;
- the resilient annular moisture barrier having a face of thin polymeric abrasion resistant and anti-frictional material.
An improved plastic coated pipe coupling, the improvement comprising:
- a mandrel;
- a metallic coupling nut located on the mandrel having an end face, and an exterior polymeric coating;
- a metallic body located on the mandrel having a plastic coating and a flange having at least one face perpendicular to the axis of the body;
- a spacer for locating the nut on the mandrel with respect to the body;
- and
- a means for separating the nut from the body between the end face and flange.
An improved plastic coated pipe coupling, the improvement comprising:
- a mandrel for aligning said couplings end to end;
- a metallic coupling nut located on the mandrel having an end face, and an exterior polymeric coating having an integral collar;
- a metallic body having a plastic coating having an integral upstanding flange, the flange having at lest one face perpendicular to the axis of the body;
- a resilient moisture barrier;
- a spacer for repositioning the nut with respect to the body;
- and
- a means for separating a nut and body between the end face and flange whereby said flange and end face are adapted to engage the moisture barrier therebetween.
Dependencies are inferred from the claim text.