BELLOWS VALVE Russian patent published in 2005 - IPC

FIELD: valving.

SUBSTANCE: bellows valve comprises housing, valving member, and rod sealed with a bellows. The bellows is connected with the housing through the bellows bushing. The bushing is provided with elongated openings of the same lengths. The openings are lengthened along the axis of the rod. The pin is mounted in the rod perpendicular to its axis. The ends of the pin are set into the openings. The elongated openings are made of grooves and arranged from the side of the bottom face of the bellows bushing. The bellows bushing embraces the bellows and the junction of the rod with the valving member shifted with respect to the bellows level by the length of the elongated grooves. The top walls of the elongated grooves restrict the stroke of the valve in the "open" position. The pin is mounted at 90° with respect to the axis of the branch pipes of the valve in the openings in the valving member and in the opening in the rod which is coincident with it. The opening in the rod is elongated in the direction of the bellows along the axis of the rod to define a guaranteed space when the pin is inside it.

EFFECT: enhanced reliability.

2 dwg