WASHER OUT OF FLEXIBLE MATERIAL AND PROCEDURE FOR ITS FABRICATION Russian patent published in 2011 - IPC F16J15/10 

FIELD: machine building.

SUBSTANCE: washer out of flexible material has two layers. An internal layer, minimal by volume, is made out of expensive flexible material, for example, fluorine rubber (FPM) with zero permeability for benzene, while an external layer, maximal by volume, is made out of nitrile rubber with polyvinylchloride (NBR/PVC) super-resistant to fuels and of low cost. Here is disclosed procedure for fabrication of the washer.

EFFECT: decreased amount of expensive material in structure of washer.

2 cl, 3 dwg