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US 4,934,914 AGranted
Portable motor pump
AssigneeEbara Corporation
InventorsMakoto Kobayashi, Kiyoshi Ouchi, Shinji Nishimori, Tsuyoshi Maeda, Yoshio Miyake
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AssigneeEbara Corporation
InventorsMakoto Kobayashi, Kiyoshi Ouchi, Shinji Nishimori, Tsuyoshi Maeda, Yoshio Miyake
Estimating the term…
A portable motor pump of the type in which a pump section driven by a motor is installed inside a liquid chamber, with a discharge port of the pump section being opened into the liquid chamber, and in which water which is to be pumped is led from the outside of the liquid chamber to a suction port of the pump section and the pumped water is discharged from the liquid chamber to the outside is disclosed. The liquid chamber is defined by a motor pump body, a pump outer casing outwardly spaced from and surrounding the motor pump body, a motor head cover covering an upper opening of the pump outer casing and a bottom plate covering a lower opening of the pump outer casing. A circulating water suction port for self-priming of the motor pump is opened into the liquid chamber. A suction port which communicates with the suction port of the pump section and a discharge port for discharging the pumped water to the outside are provided in the motor head cover.
In a portable motor pump of the type in which a pump section driven by a motor is installed inside a liquid chamber, with a discharge port of said pump section being opened into said liquid chamber, and water which is to be pumped is led from the outside of said liquid chamber to a suction port of said pump section and said pump water is discharged from said liquid chamber to the outside, wherein said liquid chamber is defined by a motor pump body, a pump outer casing outwardly spaced from and surrounding said motor pump body, a one piece motor head cover covering an upper opening of said pump outer casing and the top of the motor pump, and a bottom plate covering a lower opening of said pump outer casing, in that a circulating water suction port for self-priming of said motor pump is opened into the liquid chamber, and in that a suction port which communicates with said suction port of said pump section and a discharge port for discharging the pumped water to the outside are provided in said motor head cover, whereby the amount of priming required to effect said self-priming is reduced and residual water having a low level is readily drained.
In a portable motor pump of the type in which a pump section driven by a motor is installed inside a liquid chamber, with a discharge port of said pump section being opened into said liquid chamber, and water which is to be pumped is led from the outside of said liquid chamber to a suction port of said pump section and said pumped water is discharged from said liquid chamber to the outside, said portable motor pump is characterized in that said liquid chamber is defined by a motor pump body, a pump outer casing outwardly spaced from and surrounding said motor pump body, a motor head cover covering an upper opening of said pump outer casing, and a bottom plate covering a lower opening of said pump outer casing, in that a circulating water suction port for self-priming of said motor pump is opened into the liquid chamber, in that a suction passage communicating with said suction port of the pump section is defined between an upper surface of said bottom plate and a lower surface of a casing portion of said motor pump body, and in that a nozzle communicating with said circulating water suction port and with said suction passage of said pump section is positioned in said bottom plate.
Dependencies are inferred from the claim text.