FIELD: machine building.
SUBSTANCE: proposed cap represents spherical segment with backup ring. Spherical segment is divided into fractions while segment top has hole stopped by bush. Spherical segment has zone with division plane of adjacent fractions located in meridional planes. Bush and said fractions are arranged to make slit gap aligned with spherical segment lengthwise axis and slit gap with meridional arrangement. Slit gaps are filled with filling compound of strength lower than that of fractions of both segment and bush. Said filling compound is integral with material of spherical segment and bush. Said filling compound is made up of two portions. Every said portion fills partially slit gap to make lengthwise recess for anti-adhesion compound to be applied thereon. Second portion of filling compound is applied over anti-adhesion compound.
EFFECT: higher operating performances.
3 cl, 3 dwg
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