Manifold fitting for a compressed air tank

DETAILED DESCRIPTION Among the several objects of this invention may be noted the provision of a manifold fitting for a compressed air tank with components which can be easily interchanged; the provision of such a manifold fitting that has the flexibility of changing to various configurations; and the provision of such a manifold fitting which is simple in construction, inexpensive to manufacture, easy to install and reliable in operation.
In general, a manifold fitting of this invention is designed for a compressed air tank and comprises an elongate main body having a passage therethrough from one end to the other.
The body has an externally threaded end portion at one end of the passage for attachment of the fitting to a tank for communication with the tank and a second end portion at the other end of the passage.
An outlet member is threaded in a first lateral opening in the main body and has a valve seat at its inner end.
A valve member is threaded in a second lateral opening in the main body opposite the outlet opening and in axial alignment with the outlet member.
The valve member extends across the passage with space around it for flow of air through the passage.
The valve member is adapted to be threaded inwardly in the second lateral opening for engagement of its inner end with the valve seat and to be threaded outwardly with respect to the second lateral opening to an open position for flow of air from the tank through the passage and the outlet member.
A pressure relief safety valve is provided comprising a body having a vent port therein, a valve member movable in the body from a closed position blocking said port to an open position for escape of air through the port and spring means for biasing the valve member to its closed position.
The safety valve body is threaded at one end constituting its inner end in a third lateral opening in the main body.
The main body further has a fourth threaded lateral opening for a pressure gauge.
Other objects and features will be in part apparent and in part pointed out hereinafter