Back to results
US 6,474,937 B1Granted
Liquid pump, especially for delivering fuel
AssigneeRobert Bosch GmbH
InventorsJohann Rothkopf, Luciano Zorzin, Dirk Bruhs
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeRobert Bosch GmbH
InventorsJohann Rothkopf, Luciano Zorzin, Dirk Bruhs
Estimating the term…
The fluid pump has an impeller (10), provided with vanes (12) and driven to rotate in a pump chamber. The pump chamber is defined in the direction of the pivot axis (18) of the impeller (10) by wall parts (24), in each end face (25) of which toward the impeller (10) there is one annular feed conduit (32). An intake opening discharges in the region of the beginning of the feed conduit of one wall part, and an outlet opening (34) discharges in the region of the end of the feed conduit (32) of the other wall part (24). The outlet opening (34) is embodied as elongated in the circulation direction (11) of the impeller (10), and in the radial direction with respect to the pivot axis (18) of the impeller (10), it has a width (b) that is less than the width (B) of the feed conduit (32) in the radial direction. Instead of the elongated outlet opening (34), it is also possible for a plurality of separate outlet openings to be provided, which are offset from one another in the circulation direction (11) of the impeller (10).
A fluid pump, in particular for pumping fuel, having a pump impeller (10), driven to rotate and provided with vanes (12), which is disposed in a pump chamber (20) defined in the direction of its pivot axis (18) by respective wall parts (22, 24), having an intake opening (30) in one wall part (22) and an outlet opening (34) in the other wall part (24), having an annular feed conduit (28, 32) respectively disposed in end faces (23, 25), toward the pump impeller (10), of the wall parts (22, 24), wherein the intake opening (30) discharges in the region of the beginning of the feed conduit (28) of the one wall part (22) and the outlet opening (34) discharges in the region of the end of the feed conduit (32) of the other wall part (24), characterized in that the outlet opening (34) is embodied as elongated in the circulation direction (11) of the pump impeller (10) and in the radial direction has a width (b), with respect to the pivot axis (18) of the pump impeller (10), that is less than the width (B) of the feed conduit (32) in the radial direction in an area around the outlet opening (34).
A fluid pump, in particular for pumping fuel, having a pump impeller (10), driven to rotate and provided with vanes (12), which is disposed in a pump chamber (20) defined in the direction of its pivot axis (18) by respective wall parts (22, 24), having an intake opening (30) in one wall part (22) and at least one outlet opening (44a, b, c, e) in the other wall part (24), having an annular feed conduit (28, 32) respectively disposed in the end faces (23, 25), toward the pump impeller (10), of the wall parts (22, 24), wherein the intake opening (30) discharges in the region of the beginning of the feed conduit (28) of the one wall part (22) and the at least one outlet opening (44a, b, c, d, e) discharges in the region of the end of the feed conduit (32) of the other wall part (24), characterized in that a plurality of outlet openings (44a, b, c, e) are provided, which are disposed offset from one another in the circulation direction (11) of the pump impeller (10).
Dependencies are inferred from the claim text.