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Patent Searching and Data


Title:
GEAR PUMP OR MOTOR
Document Type and Number:
Japanese Patent JPH06159255
Kind Code:
A
Abstract:

PURPOSE: To enhance the quality of fluid to be fed and to stabilize the feed volume of the fluid by forming a suction port having a shape such that the cross-sectional area thereof gradually decreases toward the opening end on a side where a pair of gears are meshed with each other, so as to introduce the fluid into troughs of both gears through the suction port with no stagnation.

CONSTITUTION: A pair of gears 4a, 4b are fitted in a body so as to be circumscribed by the inner periphery 3c of a body and meshed with each other. Further, a suction port 7 is formed on the estrangement side of the meshing position (p) between the gears 4a, 4b. Further, a discharge port 8 is formed on the approaching side of the meshing position (p). Further, the fluid from the suction port 7 is trapped between the troughs 4c of the gears 4a, 4b and the inner periphery 3c of the body, and is then led to the discharge port 8. With this arrangement, the suction port 7 is formed in a shape such that the size thereof gradually decreases toward the opening end 7a in the meshing direction. With this arrangement, the fluid from the suction port 7 is introduced into the troughs 4c with no stagnation, and accordingly, it is possible to prevent the fluid from stagnating at the opening end 7a.


Inventors:
KISHIMOTO KATSUJI
Application Number:
JP30992892A
Publication Date:
June 07, 1994
Filing Date:
November 19, 1992
Export Citation:
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Assignee:
SHIMADZU CORP
International Classes:
F03C2/08; F04C2/18; F04C13/00; (IPC1-7): F04C2/18; F03C2/08; F04C13/00
Attorney, Agent or Firm:
Kazuhiro Akazawa