(under subclass 565.01) Subject matter having a pump associated with fluid delivery tubing, usually vertically positioned in a well, the tubing being provided with a drain valve which has an actuator mounted on or supported by the pump housing, the pump mounting, or a part thereof. [figure] [caption]Figure 1: A typical example of the subject matter. Note: Drain valve for pump: Valve is attached to pump tube. The operating rod for valve extends through platform, and handle on the rod engages the housing on the platform.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206+, for a gas pressure storage for displacement of liquid and subclass 593 for a head-establishing standpipe or expansion chamber (e.g., surge tanks).
SEE OR SEARCH CLASS
251, Valves and Valve Actuation,
145+, for an apparatus including a pipe having a valve mounted on the side thereof, including a structure disclosed for use as a well tube drain, and wherein an actuator for the valve is mounted on the tube.
417, Pumps, 434, for a pump provided with a separate port on a noncyclic valve for draining the pump portion.
