I-piston ring ine-notch futhi ayiyona indandatho eyindilinga endaweni ekhululekile. Ubukhulu bayo bangaphandle bukhulu kunobubanzi bangaphakathi besilinda. Ngakho-ke, ngemva kokufakwa ku-cylinder kanye ne-piston, ikhiqiza amandla okunwebeka futhi ibambelele odongeni lwesilinda.

Indandatho ye-piston icindezelwa endaweni ephansi yokugcina ye-groove ngaphansi kwesenzo sokucindezela kwegesi, ngakho-ke igesi igeleza izungeze ngemuva kwendandatho futhi iyanwebeka, futhi ukucindezela kwayo kuyehla. Ngesikhathi esifanayo, amandla okucindezela kwegesi engemuva lendandatho enza indandatho yepiston inamathele kakhulu odongeni lwesilinda. Lapho igesi ukucindezela kwayo kwehlisiwe ivuza kusukela ekusikeni kwendandatho yegesi yokuqala kuya endizeni engaphezulu kwendandatho yesibili yegesi, indandatho yegesi icindezelwa endaweni ephansi yokugcina inkatho yesibili. Igeleza ijikeleze ngemuva kwendandatho futhi iphinde ikhule, futhi umfutho wayo uyancipha nakakhulu.

Uma lokhu kuqhubeka, izinga lokucindezela nokugeleza kwegesi evuzayo eringini yokugcina yegesi yehliswe kakhulu, ngakho inani lokuvuza kwegesi lincane kakhulu. Ngakho-ke, idivayisi yokuvala "i-labyrinth" eyakhiwe izindandatho zegesi ezimbalwa ezinokusikeka okunyakazayo yanele ukuvala ngokuphumelelayo igesi yokucindezela okuphezulu kusilinda.