Abstract: A cylinder and dip tube device including a container having an elongated cylindrical portion terminating in a bottom at one end and an open top at the other. A closure member covers the open top. A first inlet is formed in the closure member and extends from an inlet junction on a side wall of the closure member to an egress on the face. A first outlet is formed in the closure member and extends from an outlet junction on a side wall of the closure member to an ingress on the face. A second inlet is disposed in the closure member and extends from an inlet junction to an ingress on a side wall of the closure member. A second outlet is disposed in the closure member and extends from the outlet junction to an egress on a side wall of the closure member. A removable valve including a removable diaphragm is disposed therein covering each of the inlet junction and the outlet junction whereby to control the inflow and outflow of materials stored in the container.

Abstract: A fluid operated valve in which the fluid from the line in which the valve is placed is used to aid in the opening and closing of said valve. A shuttle valve communicating with both the inlet and outlet chambers of the valve is operable to permit one of said chambers containing fluid under pressure to communicate with an auxiliary chamber in the valve to provide a closing force for the valve.

Abstract: A shutoff valve in a line containing fluid under pressure which after being closed is held closed by another fluid under pressure. The other fluid is one such as air which is available at the valve.