Pump particularly for pumping a liquid such as ink, paint, glue or the like
AssigneeFluid-O-Tech S.R.L.
InventorsDiego ANDREIS, Pierpaolo LUCCHESI, Stefano COPELLI, Carlo GONELLA
Life of this patent
Estimating the term…
Abstract
A pump particularly for pumping a liquid such as ink, paint, glue or the like, includes at least one rotating pumping member having a respective shaft. The at least one rotating pumping member being at least partially housed inside a pump body, the shaft being rotatably supported by at least one support associated with the pump body. The shaft has on its external cylindrical surface in contact with the liquid one, or more recesses, or the at least one support includes on its internal cylindrical surface in contact with the liquid, one or more recesses.
Claims15
A pump for pumping a liquid, comprising at least one rotating pumping member comprising a respective shaft, said at least one rotating pumping member being at least partially housed inside a pump body, said shaft being rotatably supported by at least one support associated with said pump body, wherein said shaft comprises, on its external cylindrical surface in contact with said liquid one, or more recesses, or wherein said at least one support comprises, on its internal cylindrical surface in contact with said liquid, one or more recesses.
A pump for pumping a liquid, comprising at least one rotating pumping member comprising a respective shaft, said at least one rotating pumping member being at least partially housed inside a pump body, said shaft being rotatably supported by at least one support associated with said pump body, said shaft comprising, on its external cylindrical surface in contact with said liquid, one or more recesses comprising a plurality of facets having a longitudinal development substantially parallel to the axis of said shaft, said facets being distributed according to a radial symmetry with respect to the axis of said shaft, said shaft having a polygonal cross-section having a number of sides greater than or equal to 3, wherein said vertices a said polygonal cross-section are rounded so as to define a contact surface with said support lying on said external cylindrical surface of said shaft.
A pump for pumping a liquid, comprising at least one rotating pumping member comprising a respective shaft, said at least one rotating pumping member being at least partially housed inside a pump body, said shaft being rotatably supported by at least one support associated with said pump body, said at least one support comprising, on its internal cylindrical surface in contact with said liquid, one or more recesses comprising a plurality of grooves having a longitudinal development substantially parallel to the axis of said shaft, said grooves being distributed according to a radial symmetry with respect to the central axis of said support so as to maintain at least a portion of said internal cylindrical surface in contact with the respective external cylindrical surface of said shaft in each relative position between said shaft and said support.
Dependencies are inferred from the claim text.