Float-type exhaust device

TL;DR: In this paper, a simple and durable construction is proposed to close an exhaut valve by fitting a float in the lower part of a casing so that the float can move up and down and by providing a spring in the valve chamber of the upper part of the casing to push the exhaust valve.

Abstract: PURPOSE:To surely close an exhaut valve through a simple and durable construction, by providing a float in the lower part of a casing so that the float can move up and down and by providing a spring in the valve chamber of the upper part of the casing to push the exhaust valve and by utilizing the buoyancy and the spring force. CONSTITUTION:A casing body 1a has an inlet connection port 1a in the lower part and a float chamber 5 in which a float 4 is provided and which is defined in an opening 3, which is connected to the inlet connection port 1a by fitting the casing body 1 and a casing cover 2 on each other. An exhaust outlet port 2a and a valve chamber 7, which are connected to each other through the valve hole 6 of the casing cover 2, are provided. An exhaust valve 8 is provided in the valve chamber 7 so that the valve is opposed to the valve hole 6 and can be moved up and down. A spring 9 for pushing the valve 8 is supported by a stop ring 10. A plate lever 11 is provided so that it can swing about the fulcrum on the lower part of the stop ring 10. The exhaust valve 8 is surely tightly fitted on the valve hole 6 by the multiplication of the force of the spring 9 and the buoyancy of the float 4 which pushes the plate lever 11.