Abstract: A vent and exhaust device for a container within which an overpressure of gas can be created during use, such as a battery for a vehicle. The device having a hollow body, suited to being arranged on an opening of such container with internal cavity, closed but communicating with the outside and with a passage connected to the inside of the container from which the gas that forms in the latter can pass to escape to the outside of the aforesaid body. There being placed on such passage a filter element permeable to such gas. Such filter element is subject to pressure placed in such cavity and suited to pushing it in the position of interception of the passage, but allowing the momentary opening of the latter for a venting of the gas when the pressure exceeds a predetermined value.

Abstract: A vent and exhaust device for a container within which an overpressure of gas can be created during use, such as a battery for a vehicle. The device having a hollow body, suited to being arranged on an opening of such container with internal cavity, closed but communicating with the outside and with a passage connected to the inside of the container from which the gas that forms in the latter can pass to escape to the outside of the aforesaid body. There being placed on such passage a filter element permeable to such gas. Such filter element is subject to pressure placed in such cavity and suited to pushing it in the position of interception of the passage, but allowing the momentary opening of the latter for a venting of the gas when the pressure exceeds a predetermined value.