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Boris S Eremenko

Rusaam S Nemets

Efim S Gorbulev

Jury M Kontsov

Viktor P Moldavanov

Anatoly V Adamovich

Lev A Burov

Felix A Brainman

Ivan A Koval

Matvei I Averbukh

Viktor F Axenov

Vladimir G Kislov

A compound oil ring comprises flat rings and a tangential expander provided therebetween. The tangential expander comprises an annular integrally bent serpentine spring having vertically extending webs and horizontally extending flanges terminating in vertically extending bearing shoulders. Each vertically extending flange is bent so as to form at least one bend extending into the interior of the compound oil ring.

Piston ring assembly with tangential expander

The joint of the expander is formed by tooth-like portions of the side flanges of a U-shaped spring, bent inward and coiled into a ring. The device comprises a measuring gear which reels off the sinuous profiled spring from a spiral. The gear has a radial slot receiving the reciprocating cutters acting in conjunction with bending punches which bend the cut-off tooth-like ends of the spring, locked into a joint.

Tangential expander for oil control piston rings

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Kharkiv, Ukraine

Boris S Eremenko