Apparatus and process for providing tubing with at least one int

Details Apparatus and process for providing tubing with at least one int Apparatus and process for providing tubing with at least one int

1986-06-23

1987-10-27

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With metal deformation of different type

72 77, 72283, 384613, B21C 3720

Patent

active

047020962

ABSTRACT:
Apparatus and process for providing the internal portion of tubing with a spiral groove or fin, or preferably a plurality of internal spiral fins, and which apparatus and process include a rotatably mounted spinner provided with one or more external ridges, which, upon relative movement of the tubing with respect to the spinner imparts rotation to the spinner causing the ridge or ridges to engage the tubing internal portion and provide at least one internal spiral groove therein; upon a plurality of external spiral ridges being provided on the spinner a plurality of internal spiral fins are formed.

REFERENCES:
patent: 4135772 (1979-01-01), Stodt

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