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Patent Searching and Data


Title:
INCONTINUOUS CONTACT GEAR FOR INTERNAL GEAR TYPE FLUID PUMP
Document Type and Number:
Japanese Patent JPS62223486
Kind Code:
A
Abstract:

PURPOSE: To smoothly transfer fluid by making an internal gear and an external gear carry out a first engagement and a second engagement at symmetrical sites with respect to a center line each at a contact ratio of one (1) or more, and forming capacity variable spaces between both engaging parts.

CONSTITUTION: An oil pump is formed by an internal gear 1 and an external gear 2, and the external gear 2 is brought into contact with the internal gear 1 in the section about from the point A to the point B and at a contact ratio of one (1) or more. The gears are shiftedly brought into contact with each other at their addendum curved lines at a contact ratio of one (1) or more from the point C to the point E. And, capacity spaces SaWSd are formed in between both gears. Thereby, the outlet and inlet ports for fluid can be easily designed, enabling smooth conveyance of fluid.


Inventors:
Osada, Shigeyoshi
Application Number:
JP1986000064169
Publication Date:
October 01, 1987
Filing Date:
March 24, 1986
Export Citation:
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Assignee:
HITACHI POWDERED METALS CO LTD
OSADA SHIGEYOSHI
International Classes:
F04C2/10; (IPC1-7): F04C2/10