Patent ID: 8161999
Filing Date: 2012-04-24
Classification: F16K,Y10T

Abstract:
1. A swing valve comprising: a body having an inner surface defining an opening; a plate positioned substantially within the opening of the body; a pivot rod coupled to the body and the plate, the pivot rod defining a pivot axis, the plate being pivotable about the pivot axis relative to the body between an open position and a closed position; a locking mechanism coupled to the plate, the locking mechanism including a member that is movable relative to the plate between a first position, in which the locking mechanism engages the body to lock the plate in the closed position, and a second position, in which the locking mechanism disengages the body to allow movement of the plate relative to the body; a first port coupled to the locking mechanism in communication with the member, wherein the first port directs pressurized fluid toward the locking mechanism to move the member relative to the plate, wherein the locking mechanism further includes a cylinder and the member includes a piston positioned at least partially within the cylinder, and wherein the first port is in communication with the cylinder to direct pressurized fluid into the cylinder to move the piston relative to the plate toward at least one of the first and second positions; a seal coupled to an outer edge of the plate, the seal being inflatable to tightly engage the inner surface of the body when the plate is in the closed position; and a second port coupled to the plate in communication with the seal to enable inflation of the seal.