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AssigneesBinks Manufacturing Company, Bayer Aktiengesellschaft
InventorsCarl M. Springer, Bernd O. Theis, Georg Wawra, Richard Juffa
Estimating the term…
Flushable rotary gear pumps for delivering fluidic material, such as liquid coating material, may quickly and thoroughly be flushed of material of one type in preparation for delivering material of another type. In one embodiment, a valve selectively establishes a bypass channel between an inlet to and an outlet from a pump, thereby to accommodate a relatively large volume flow of flushing media through the pump and supply and delivery lines therefor. In another embodiment, the valve is structured to monitor fluid pressure developed by the pump and to automatically control and limit the pressure to a maximum value should an overpressure condition develop. In yet other embodiments passages are provided internally of the pump for conveying flushing media to all exposed surfaces of the gears, gear shafts and pump body to flush the same of coating material, whereby the entirety of the pump may readily be cleansed. If desired, the various features may be combined in a single pump.
In a rotary gear pump of a type for metering precise quantities of fluidic material and comprising a pump body having an inlet for connection with a supply line, an inlet chamber in communication with said inlet, an outlet for connection with a delivery line, an outlet chamber in communication with said outlet and first and second gears mounted for rotation in meshed engagement in said body, said gears meshing at a point between said inlet chamber and said outlet chamber for delivering fluidic material introduced through said inlet from said inlet chamber to said outlet chamber and said outlet, the improvement comprising first passage means in communication with said inlet and outlet;
In a rotary gear pump of a type for metering precise quantities of fluidic material and comprising a pump body having an inlet for connection with a supply line, an inlet chamber in communication with said inlet, an outlet for connection with a delivery line, an outlet chamber in communication with said outlet and first and second gears mounted for rotation on respective first and second shafts in meshed engagement in said body, said gears meshing at a point between said inlet chamber and said outlet chamber for delivering fluidic material introduced through said inlet from said inlet chamber to said outlet chamber and said outlet, the improvement comprising first passage means extending between and in communication with said inlet and said outlet;
In a rotary gear pump of a type for metering precise quantities of fluidic material and comprising a pump body having an inlet, an inlet chamber in communication with said inlet, an outlet, an outlet chamber in communication with said outlet and first and second gears mounted for rotation on respective first and second shafts in meshed engagement in said body, said gears meshing at a point between said inlet chamber and said outlet chamber for delivering fluidic material introduced through said inlet from said inlet chamber to said outlet chamber and said outlet, the improvement comprising at least a second inlet to said body separate from said first mentioned inlet, said outlet and said inlet and outlet chambers, passage means in said body separate from said first mentioned inlet, said outlet and said inlet and outlet chambers and extending between said at least second inlet and spaces defined between adjacent surfaces of said shafts, pump body and gears, and means for connecting a supply of flushing media with said at least second inlet, whereby flushing media may be introduced at said at least second inlet and through said passage means into said spaces to clean and adjacent surfaces of the fluidic material.
Dependencies are inferred from the claim text.