Filter having holes in filter section thereof
OwnerTakashi Yamaguchi, Toshiyuki Yoda +2inventors
InventorsTakashi Yamaguchi, Toshiyuki Yoda, Eiji Itou, Senta Tojo
Life of this patent
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Abstract
A filter is press-inserted into a mounting bore of an injector. The filter has an inlet section at an opening-end fuel inlet side and a filter section which has a number of holes. The bottom of the filter section is hemispherically-shaped so that a flow area formed between the outer surface of the hemispherical bottom portion and the inner round surface of the mounting inlet bore widens gradually to reduce pressure loss effectively.
Claims11
A filter for fitting in a bore of a fluid passage body having an inner surface, comprising:
- an inlet section which is fixed in the bore of the fluid passage body at a peripheral surface thereof;
- a filter section integral with the inlet section and having a plurality of holes to filter the fluid at a peripheral surface thereof which defines a tubular fluid passage with the inner surface of the fluid passage body;
- and
- a closed end section integral with the filter section, wherein the closed end section is shaped so that a cross-sectional area between an outer surface of the closed end section and the inner surface of the fluid passage body increases gradually in a fluid flow direction.
A filter for fitting in a bore of a fluid passage body, which has an inner surface defining a fluid passage, comprising:
- an inlet section fixed in the bore of the fluid passage body at a peripheral surface thereof;
- a filter section integral with the inlet section and having a plurality of holes to filter the fluid at a peripheral surface thereof which defines a tubular fluid passage with the inner surface of the fluid passage body;
- and
- a closed end section integral with the filter section,
- wherein each of the holes is formed so that a diameter thereof is larger at a radially outer side of the filter section than at a radially inner side of the filter section.
A filter for fitting in a bore of a fluid passage body, which has an inner surface defining a fluid passage, comprising:
- an inlet section fixed in the bore of the fluid passage body at a peripheral surface thereof;
- a filter section integral with the inlet section and having a plurality of holes to filter the fluid at a peripheral surface which defines a fluid passage with the inner surface of the fluid passage body;
- and
- a closed end section integral with the filter section, wherein the closed end section has no hole to disable flow of the fluid in an axial direction.
A filter for fitting in a bore of a fluid passage body, which has an inner surface, comprising:
- an inlet section fixed in the bore of the fluid passage body at a peripheral'surface thereof;
- a filter section integral with the inlet section and having a plurality of holes to filter the fluid at a peripheral surface which defines a tubular fluid passage with the inner surface of the fluid passage body;
- and
- a closed end section integral with the filter section,
- wherein the tubular fluid passage has a cross-sectional area which is equivalent to or smaller than a summation of cross-sectional areas of the holes at the peripheral surface of the filter section.
Dependencies are inferred from the claim text.