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Title:
AUTOMATIC AIR VENT DEVICE FOR OIL PUMP FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPS62191672
Kind Code:
A
Abstract:

PURPOSE: To prevent a back flow of air certainly, by setting a fluid control element in an air vent route of an oil pump, to make resistance of flow from an opening of an oil tank toward an air vent port, bigger than that from the air vent port toward the opening of the oil tank.

CONSTITUTION: An oil pump 25 attached to an outboard engine, is constituted as a worm wheel member 55 is moved up/down, by the rotary motion of a worm 53 moved connectedly with a crank shaft, and the rotary motion of a cam shaft 81 moved connectedly with a throttle lever, and lubricating oil led to a connecting pipe 39 for suction, is pressurized and discharged from plural connecting pipes 49 for discharge. An air vent port 51 is formed at the top of a housing 33, and this port 51 is connected to a drain pipe 23 through an air vent pipe 27. In this case, a check valve 93 is set in the side port 91c of a connecting pipe 89 set at the connecting part between said both pipes 23, 27. This check valve 93 is formed as functioning as a fluid control element, to make resistance of air flow in the normal direction, is smaller than that of the backward air flow.


Inventors:
ABE AKISHI
FUKAZAWA MASAYASU
Application Number:
JP1986000034455
Publication Date:
August 22, 1987
Filing Date:
February 18, 1986
Export Citation:
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Assignee:
SANSHIN KOGYO KK
International Classes:
F01M11/00; F01M13/00; F04B53/06; F02B61/04; F02B75/02; (IPC1-7): F01M11/00; F04B21/00
Domestic Patent References:
JPS5343209A1978-04-19