Spout construction for diverter

Claim 1

In a tub and shower fitting of the class described, in combination, a main valve unit having a shower outlet and a tub outlet, and a spout connected to said tub outlet, said spout including a body having an outlet section at the outer end thereof, an outlet at said end, an outlet line extending from the unit to said section, said section being provided with a substantially cylindrical pressure chamber therein, guide means in said chamber, a lift stem extending upwardly therein and terminating outside the said section, a knob on the upper end of the stem, a shut-off valve member connected to the stem and movable along the guide means to control the flow of liquid from the outlet end, said member having a head at the upper end of similar diameter to the chamber, a central guide portion extending downwardly therefrom and a seal section at the lower end, a seat mounted in the outlet aforesaid, a seat opening therein, the head having substantially greater area than the seat opening, sealing means for said head intermediate the chamber and head to prevent fluid leakage there around when the valve member is moved to shut-off position, vent means for said valve member to facilitate movement thereof when it is desired to direct flow from the shower outlet to the spout outlet, and a seat seal in the seat section to engage the seat opening therein simultaneously with the sealing action of the seal means, the vent means providing air to release said seal means when movement of the valve member is effected.