CUP-TYPE SEAL Russian patent published in 2015 - IPC F16J15/32 

FIELD: machine building.

SUBSTANCE: cup-type seal includes bushing with L-shaped cross-section, which is made from two parts located in alignment. Each of these bushing parts is formed by spiral wound of foil strip containing a layer of thermally expanded graphite with outspread carbonic bunch uniformly distributed through its width. The first part of bushing is designed with external surface containing cylindrical and conic sections, the second part of bushing located on external side of cylindrical section of the first part of bushing is designed cylindrical, and the mentioned first and second parts of bushing are fastened by the butt end common for its first and second parts, with safety washer with flanging along inner diameter and pre-pressed in axial direction.

EFFECT: improving tightness of movable joints under operation at high working temperatures.

4 dwg