Patent ID: 8448918
Filing Date: 2013-05-28
Classification: F16K

Abstract:
1. A gate valve for sealing at least one opening in a substantially plane front of a frame structure, comprising at least one carrier extending in a longitudinal direction at a distance from the front and a sealing plate for sealing the at least one opening fixed to the said at least one carrier, the carrier being movable forward and backward parallel to the longitudinal direction over a switching interval and the at least one sealing plate being movable between an active position where the carrier is in contact with a part of the front surrounding the opening, thereby sealing the opening, and an inactive position where it is at a distance from the said front, leaving the opening uncovered, and further comprising mechanical guide means with at least two parallel links offset in the longitudinal direction, each link being connected to the carrier pivotably about an axis extending in a lateral direction which is parallel to the front and perpendicular to the longitudinal direction and connectable to the frame structure pivotably about an axis extending in a lateral direction which is parallel to the front and perpendicular to the longitudinal direction, for the links to guide the at least one carrier such that forward motion causes it to at the same time approach the front, the at least one sealing plate assuming its active position, whereas backward motion causes it to move away from the front, the at least one sealing plate assuming its inactive position.