US 2007/0175433 A1Published application

Oil filter unit and motorcycle including the oil filter unit

AssigneeYamaha Hatsudoki Kabushiki Kaisha

InventorYugo Tomaru

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Abstract

An oil filter unit capable of forming oil passages at low manufacturing cost regardless of the attachment position of an oil filter. An adaptor for attaching an oil filter to a crank case has a first attachment surface on the crank case side and a second attachment surface on the oil filter side. The first attachment surface has first and second closed areas separated from each other by a partioning wall. The second attachment surface has an oil inlet port and an oil outlet port. The oil inlet port and the oil outlet port communicate with the first closed area and the second closed area, respectively, via their own communication paths. The adaptor is attached to the crank case such that an oil supply port formed on the crankcase is positioned within the first closed area and that an oil return port formed on the crank case is positioned within the second closed area.

Claims14

Dependent claims

An oil filter unit, comprising:

an oil filter;
and
an adaptor for attaching the oil filter to an attachment seating surface of a crank case, wherein:
the adaptor has a first attachment surface to be attached to the attachment seating surface of the crank case and a second attachment surface to be attached to the oil filter;
the first attachment surface has a first closed area and a second closed area separated by a partitioning wall;
the second attachment surface has an oil inlet port through which oil is introduced from an oil pump and an oil outlet port through which oil is discharged to an oil passage formed in the crank case;
the oil inlet port communicates with the first closed area formed on the first attachment surface and the oil outlet port communicates with the second closed area formed on the first attachment surface;
and
the adaptor is attached to the attachment seating surface of the crank case such that an oil supply port formed on the attachment seating surface of the crank case is positioned within the first closed area and an oil return port formed on the attachment seating surface of the crank case is positioned within the second closed area.

6 more elements

Dependencies are inferred from the claim text.