A driving and connecting assembly of a vacuum chamber

A driving and connecting assembly of a vacuum chamber, characterised in that it has a housing (1) in the form of a sleeve and a double-grade opening, which accommodates two sliding bushes (2 and 3). The double-graded bush (2) contains a compressed helical spring (4), with one end resting against the bush (2) shoulder, while the other rests against the washer (5), resting against the lid of the vacuum chamber. Moreover, a partly-hollowed double-graded roller (6) is pressed inside the smaller bush (2) opening. The roller is connected to the driving mandrel (7) of the vacuum chamber and its shoulder rests against the shoulder of the bush (2). In the second bush (3) with an internal flange, there is another compressed helical spring (8). One end of the spring rests against the a convex contact (9) of the device, connected to a bush end (3), while the other spring end rests against one of the faces of the washer (10) secured on the roller (6). The other washer face is pressed by the faces of the bush (2) and the internal bush flange (3). Additionally, the contact (9) of the device is connected through an elastic conductive band (12) to the hollowed roller (6).