ELECTRIC PUMP UNIT

PROBLEM TO BE SOLVED: To provide an electric pump unit which increases mechanical efficiency and suppresses reduction of volume efficiency.SOLUTION: On a face facing an outer gear 11 of an internal gear pump 3 of a pump body 5, grooves 21, 22 are provided at positions not including a boundary portio...

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Bibliographische Detailangaben
Hauptverfasser:	MITSUI TETSUYA, HAYASHI NORIYASU, KUBO ATSUSHI, MUKAIDE NAOMASA, WATANABE KENTARO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an electric pump unit which increases mechanical efficiency and suppresses reduction of volume efficiency.SOLUTION: On a face facing an outer gear 11 of an internal gear pump 3 of a pump body 5, grooves 21, 22 are provided at positions not including a boundary portion between a discharge port 20 and a suction port 19. The grooves 21, 22 reduce friction resistance. Providing the grooves 21, 22 at positions not including the boundary portion between the discharge port 20 and the suction port 19 prevents oil leak.