초록 ▼

A reversible positive displacement rotary fluid pump comprising a rotor with dual sliding vanes defining pumping cavities of increasing and decreasing volume and having a single non-valved inlet for both directions of rotation, outlet flow being controlled by a valve plate rotatable to one of two po

A reversible positive displacement rotary fluid pump comprising a rotor with dual sliding vanes defining pumping cavities of increasing and decreasing volume and having a single non-valved inlet for both directions of rotation, outlet flow being controlled by a valve plate rotatable to one of two positions, as determined by the direction of rotation of the pump, and a stationary porting plate.

대표청구항 ▼

In a reversible, rotary fluid pump including a housing defining a pumping chamber, fluid outlet means, rotary pumping means disposed within said pumping chamber rotating about an axis, and a shaft for driving said pumping means; the improvement comprising: a single fixed inlet port communicating dir

In a reversible, rotary fluid pump including a housing defining a pumping chamber, fluid outlet means, rotary pumping means disposed within said pumping chamber rotating about an axis, and a shaft for driving said pumping means; the improvement comprising: a single fixed inlet port communicating directly with said pumping chamber and with said pumping means at the same point of said pumping chamber in all operable conditions of said pumping means; a fluid inlet passageway in fluid communication with said inlet port; and a movable valve plate disposed in frictional engagement with said pumping means, axially disposed from said pumping means, and being adapted for limited rotational movement to one of two operative positions in accordance with the direction of rotation of said pumping means, said valve plate having passageway means formed therein for directing fluid flow from said pumping chamber to said fluid outlet means in each of said operative positions.