elastic gasundurchlu00e4ssige membrane and thus equipped lift float.

摘要

Hydropneumatic accumulator of type comprising at least one hollow sphere whose cavity is subdivided, by a membrane, into two chambers, one containing gas and the other containing liquid is claimed, in which membrane comprises at least a film formed from thin layer (1 in figure) of copolymer, impermeable to gas, containing OH groups, and two layers (2,3) between which the film is incorporated, consisting of a flexible elastic material of copolymer containing polyamide and polyether blocks; and a coating of rubber (4,5) placed on at least one of the layers.