Electric heating – Metal heating – Cutting or disintegrating
Patent
1981-11-12
1984-10-09
Reynolds, B. A.
Electric heating
Metal heating
Cutting or disintegrating
219 69E, 219 69G, B23P 102
Patent
active
044763689
ABSTRACT:
A metal tube wall disintegrator is convertible in being able to disintegrate an arcuate or annular portion on the inner wall of the metal tube or to disintegrate merely one longitudinally extending portion on the inner wall of the tube. In the arcuate disintegrating mode, the disintegrator uses an electrode which is rotated at the end of a flexible cable inside the tube at a selected longitudinal position to be able to disintegrate or cut partially or completely through the tube wall. A first drive means rotates the flexible cable and electrode, and a second drive means rotates an outer tubular sheath of the flexible cable. This tubular sheath rotates a guide tip at the forward end of the outer sheath and the guide tip has a radially elongated, eccentric slot through which the electrode shaft extends. This permits a slow rotation of the eccentric slot so that the electrode disintegrator arc moves in an arcuate path around the inner tube wall. In the second mode, control means stops the rotation of the guide tip and a longitudinally elongated electrode is used to disintegrate an area at only one peripheral position in the inner tube wall, this disintegrator area having a longitudinal length greater than the lateral dimension thereof. This permits a tube wall to be disintegrated completely through, or nearly through, at this one peripheral position so that the tube may be relaxed, and hence capable of being withdrawn from a boiler tube sheet in which the tube has been confined. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
REFERENCES:
patent: 2942092 (1960-06-01), Cammann
patent: 3053966 (1962-09-01), Landis et al.
patent: 3873700 (1975-03-01), Brettrager
patent: 3995134 (1976-11-01), Dudden
patent: 4068791 (1978-01-01), Scholtus et al.
patent: 4293918 (1980-05-01), Schneider
patent: 4374313 (1983-02-01), Mateja et al.
Cammann Fred W.
Nester John
Roach Jere H.
Cammann Manufacturing Company, Inc.
Keve Alfred S.
Reynolds B. A.
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