Method of manufacturing tangential expanders for oil control pis

Details Method of manufacturing tangential expanders for oil control pis Method of manufacturing tangential expanders for oil control pis

1978-01-17

1979-11-13

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

To form helical coil or tube

72177, 291566, B23P 1506

Patent

active

041738780

ABSTRACT:
According to the claimed method a round wire is first flattened and then formed into a serpentine flat spring. The segment portions of this spring are bent up in the form of thrust shoulders and calibrated for height. The shaped spring is coiled into a spiral on a mandrel, compressed and heat-treated before cutting it into individual tangential expanders.

REFERENCES:
patent: 1343753 (1920-06-01), Sloper
patent: 2293450 (1942-08-01), Wilkening
patent: 2378058 (1945-06-01), Blumensaadt
patent: 2713527 (1955-07-01), Pien
patent: 2742277 (1956-04-01), Small
patent: 2817564 (1957-12-01), Marien
patent: 3284880 (1966-11-01), Meyer

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