Internal gear pump with recesses on the gear beariing surfaces
AssigneeCps Color Equipment SPA Con Unico Socio
InventorsGiorgio Manfredini, Uber Bortoli
Life of this patent
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Abstract
A positive-displacement pump, in particular for use in machines or dispensing fluids, including two elements that are with respect to one another and which mesh with one another (20, 30), each of them being rotatably mounted in the pump with centered coupling without interference with a corresponding centering body (18, 11a). At least one of the two above-mentioned ratable elements has a plurality of undercut regions (26, 34, 35)) at the location of the centering walls. The undercut regions (26, 34, 35) comprise a wall portion which is spaced with respect to the facing wall of the respective centering body.
Claims6
A positive-displacement pump, in particular for use in machines for dispensing fluids, comprising a centering body (11) having a cylindrical cavity (11a), a rotor (30) rotatably mounted with centered coupling without interference inside said cylindrical cavity (11a), and an idle sprocket (20) having a central opening and being rotatably mounted with centered coupling without interference on a pin (18), wherein said central opening of said idle sprocket (20) comprises portions of centering wall (23) which define said centered coupling of said idle sprocket (20) to said pin (18) and which alternate with portions of undercut regions (26) spaced from said pin (18).
Dependencies are inferred from the claim text.