| 摘要 |
PURPOSE:To prevent liquid in a liquid chamber from flowing into a pressure changing means such as an intake manifold of an engine when a diaphragm is broken. CONSTITUTION:An air chamber 74 is provided at a second auxiliary liquid chamber 70 of a vibration proof device 10 through a diaphragm 68, and this air chamber 74 is connected to an air tank 100 through a hose 88. Also, the air tank 100 is connected by a hose 89 in capable of being switched to the atmospheric air side or to the side of an intake manifold 90 through a two-port- three-position directional control valve 56. In the air tank 100, a ball-shaped buoyancy body 101 is inserted. This buoyancy body 101 is formed out of a material with the specific gravity smaller than that of a liquid 29 and floats when the diaphragm 68 is broken and the liquid 29 flows into the air tank 100 so that a connection pipe 104 at the upper end of the air tank 100 is blocked. |
