Patent ID: 7681689

Claim:
A vibration damping device for damping vibrations of a machine, the vibration damping device comprising a laminated plate formed by laminating a specified number of inner plates and an outer plate that is disposed on an outside of the specified number of the inner plates, wherein intermittent welding is performed on peripheral edges of the inner plates along a circumferential direction of the inner plates when the laminated plate is coupled to a member of the machine that is an object of vibration damping and the specified number of inner plates are tightly sealed by the outer plate and the member of the machine, wherein the laminated plate is formed by laminating the specified number of the inner plates, and the outer plate which is disposed on the outside of the specified number of inner plates and whose peripheral edge has a shape that partially differs from a shape defined by peripheral edges of the inner plates, the inner plates are caused to contact with the member of the machine that is the object of vibration damping, and the laminated plate is coupled to the member of the machine by performing continuous welding on the peripheral edge of the outer plate and performing the intermittent welding on the peripheral edges of the inner plates.