主权项 |
1. An improved rotary, self-priming, constant flow, high capacity, positive displacement pump for pumping fluids, comprising:
a pump housing having a fluid inlet and a fluid outlet; a first rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing, the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; a second rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing, the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; a pair of gears each secured to at least one of the ends of the shafts of the first and second rotary impellers, wherein the gears mesh with each other and synchronize rotation of the first and second rotary impellers to ensure that the vanes do not contact one another during rotation; and a first side pressure release chamber disposed inside the pump chamber in the pump housing, the first side pressure release chamber operationally disposed at the sides of the vanes of the first impeller, wherein each vane has an end, and a flexible seal is secured to the end of each vane. |