Filter device and method for manufacturing the same
AssigneeKyosan Denki Co., Ltd.
InventorsHironobu Oki, Junko Amagai
Life of this patent
Estimating the term…
Abstract
A filter device includes a filtering member having a rough part, which is comparatively low in a density of flow pores for flowing fluid, and a dense part, which is comparatively high in the density of the flow pores. The filter device further includes a support member that supports the filtering member and has an inflow passage and a discharge passage. The dense part supports the rough part, and is located between the rough part and the discharge passage, and is supported by a mechanical pressure applied by the support members. The filter device is capable of supporting the filtering member easily in a case member and securing a filtering area to enhance the performance of removing a foreign matter.
Claims16
A filter device comprising:
- a filtering member having a rough part, which is low in a density of flow pores for flowing fluid, and a dense part, which is high in the density of the flow pores;
- and
- a first support member being in a cylindrical shape that supports the filtering member, and has a discharge passage,
- a second support member being in a cylindrical shape that supports the filtering member, and has an inflow passage,
- wherein the dense part supports the rough part,
- the dense part includes:
- a bottom portion being in a plate-shape, the bottom portion being located between the rough part and the discharge passage and supporting the rough part;
- and
- a side wall portion extending in an axial direction of the first support member from the bottom portion and covering at least a portion of a side surface of the rough part in a radial direction,
- the dense part is supported by being applied with a mechanical pressure from at least one of the first support member and the second support member,
- the rough part is in contact with the dense part such that fluid is able to flow through the rough part and the dense part in this order,
- the bottom portion of the dense part entirely covers a bottom surface of the rough part, and
- the filtering member further includes an intermediate layer disposed between the rough part and the bottom portion of the dense part.
A filter device comprising:
- a filtering member;
- and
- a support member that supports the filtering member, and has an inflow passage and a discharge passage,
- wherein the filtering member has a rough part, which is low in a density of flow pores for flowing fluid, and a dense part, which is high in the density of the flow pores,
- the dense part has a plurality of flow pores, which are smaller in size than a plurality of flow pores of the rough part in diameter,
- the dense part is located between the rough part and the discharge passage, and supported by being applied with a mechanical pressure from the support member,
- the dense part includes:
- a bottom portion being in a plate-shape and supporting the rough part;
- and
- a side wall portion extending in the axial direction from the bottom portion and covering at least a portion of a side surface of the rough part in a radial direction,
- the dense part supports the rough part such that, in use, liquid flowing between the rough part and the support member flows into the side wall portion of the dense part,
- the rough part is in contact with the dense part such that fluid is able to flow through the rough part and the dense part in this order,
- the bottom portion of the dense part entirely covers a bottom surface of the rough part, and
- the filtering member further includes an intermediate layer disposed between the rough part and the bottom portion of the dense part.
Dependencies are inferred from the claim text.