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US 7,726,001 B2Granted
Method of manufacturing a coupling assembly
AssigneeAllied Tube & Conduit Corporation
InventorsGiulio Scartozzi, Edward Mild
Life of this patent
Estimating the term…
Abstract
A coupling system for conduit and pipe for carrying insulated electrical cable, more particularly, a conduit coupling assembly for connecting multiple lengths of conduit in coaxial relationship.
Claims2
A method of manufacturing a coupling assembly for connecting lengths of conduit for containing electrical cable comprising the steps of:
- forming a bell portion in a length of conduit with a bell expender
- forming at least one aperture and at least one raised crest in the bell portion;
- placing and securing a rivet in the at least one aperture;
- placing a set screw in the rivet whereby the outside surface of the rivet contacts the bottom contacting surface of the head of the set screw to provide frictional engagement between the rivet and the set screw when the set screw is in the tightened position, effective to achieve tightening with ¼ to 1 ½ turns, wherein the length of the set screw and the thread profile of the set screw allow the set screw to be tightened with 50-130 in-lb. of torque without dimpling an end of inserted conduit.
1 more element
Dependencies are inferred from the claim text.