Cover of ball tube

Abstract

The invention relates to a cover of a ball tube, which includes a body part (3), to which are located a pressure valve (4), fastening elements (1, 2, 9) for fastening the body part to the ball tube, which fastening elements include annular top part (1) and bottom part (2), located on top of each other around the body part, and seal (9), located between the bottom part (2) and the body part (3), as well as moving elements for moving the bottom part and the body part in relation to each other. In accordance with the invention, the body part (3) of the cover of the ball tube is locatable partially inside the ball tube, the bottom part (2) is arranged to be located around the opening of the ball tube (10) and it extends on both sides of the top edge of the ball tube, the seal (9) is inside the ball tube, and the top part (1) is arranged to move the bottom part (2) and the body part (3) in relation to each other for moving the seal (9) against the inner surface of the ball tube (10) and for fastening the cover to the ball tube in a pressure-proof way.

Dependencies are inferred from the claim text.