Method for making a pipe coupling
AssigneePSI Products, Inc.
InventorBobby E. Black
Life of this patent
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Abstract
The present invention is a method for making an electrically insulative coupling which is inserted between and coupled to two lengths of metallic pipe. The method comprises the steps of machining one end of two short sections of metallic pipe to provide a circumferential groove, inserting O rings onto the grooves, inserting the machined ends of the pipe sections into a central sleeve, injection moulding an outer insulative sleeve over the machined pipe ends and central sleeve, and pressing a metal outer sleeve over the outer insulative sleeve. By this method the electrically insulative coupling is manufactured quickly and inexpensively.
Claims9
A method for making an insulative pipe coupling comprising the steps of:
- forming an o-ring circumferential groove adjacent the end of two pipe stubs;
- inserting an o-ring onto each of said grooves;
- inserting said pipe stub ends with said o-ring into a center insulating sleeve;
- injection moulding an outer insulative sleeve over said center sleeve and said pipe ends;
- and
- pressing a metal outer sleeve onto said outer insulative sleeve.
Dependencies are inferred from the claim text.