Vacuum pump-out system for wet/dry vacuum cleaner

Claim 1

In a wet/dry vacuum cleaner device having a suction mode and a fluid pressurizing mode resulting in air and liquid discharge respectively, a tank provided with an inlet/outlet aperture, an automatic float type shut-off means in said tank being operative when said liquid rises to a predetermined level in said tank, the improvement comprising a tangential fan motor, piping connected to said motor and said tank to form a circuit, a cover on said tank substantially enclosing said motor and associated piping, an opening from the interior of said cover to said atmosphere, and a hollow rotary valve connected substantially at right angles to said piping and having a knob control extending through the top surface of said cover, said valve having a cylindrical body with an upper port and a lower port therein, an inner sleeve rotatable within said cylindrical body, a baffle plate being fixedly secured to opposite sides of the inner wall of said inner sleeve, said inner sleeve having spaced openings whereby in different predetermined positions of said baffle plate said ports and openings are aligned in communication with said piping, and said lower port communicating with said piping while said upper port communicates with the interior of said cover whereby when said inner sleeve of said rotary valve is turned to one position air is drawn into the interior of said cover from said atmosphere through said opening and passes through said upper port and piping to be pressurized by said fan motor and directed by said baffle through said lower port and into said tank whereby the liquid in said tank is forced out said inlet/outlet aperture, and when said inner sleeve of said rotary valve is turned with the baffle in another position, dirt-laden air is drawn into said tank through said inlet/outlet aperture and lower port and is directed by said baffle plate to said fan-motor and piping and out said upper port and is discharged to said atmosphere through said opening.