Pitot pump with slotted inlet passages in rotor case

Claim 1

In a pitot pump, the combination of: a rotary casing having an annular pumping chamber therein, one side wall of said chamber being provided with generally radial slots therein having one side throughout its length in open communication with said chamber, each of said slots being of substantially uniform cross section throughout its length and extending from a point adjacent to the rotational axis of said casing to a point adjacent to the inner periphery of said chamber; housing means surrounding said rotary casing and having an inlet port and a discharge port; a tubular member rigidly mounted on said housing and extending into said chamber, there being an annular passage around said tubular member and communicating between said inlet port and the inner ends of said slots, said tubular member having an axial passage therein communicating at one end with said discharge port; a pitot tube rigidly mounted on said tubular member and extending radially in said chamber, said pitot tube having adjacent its outer end a pitot inlet facing in a direction opposite to the direction of rotation of said casing, said pitot tube having a central passage therein communicating between said pitot inlet and the other end of said axial passage; and drive means extending into said housing and rigidly connected to said casing for rotating said casing.