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Process and installation for the separation of heavy and light compounds by extraction using a supercritical fluid and nanofiltration

OF THE PREFERRED EMBODIMENT It is possible to introduce into the extractor (1) the solid or liquid ...

Method of separating materials from liposomes or lipid complexes

The present invention provides methods of separating liposomes or lipid complexes from a fluid ...

Bound, active cellular organelles and method of producing same

We claim: 1. Cellular organelles, from the group consisting of mitochondria, microsomes and ...

Osmotic device for dispensing two different medications

OF THE DRAWINGS Turning now to the drawings in detail, which are an example of various osmotic ...

Porous inorganic materials

According to one aspect of the present invention there is provided a porous cellular material ...

Tissue inplant systems and methods for sustaining viable high cell densities within a host

To meet these and other objectives, the inventions provide improved implant assemblies and ...

Method and device for long-term delivery of drugs

The present invention is a device and method for the long-term local delivery of a therapeutic ...

Micromachined fluid handling apparatus with filter

What is claimed is: 1. A micromachined fluid handling apparatus comprising a micromachined filter, ...

Microfabricated particle thin film filter and method of making it

The present invention is directed to a filter comprising a first thin film structure having ...

Lever clamp

Accordingly, it is a primary object of the present invention to provide a clamp for firmly and ...

Filter

Details

Inventors: Aota, Mitsuhiro;
Assignee: Unisia Jecs Corporation (Atsugi, JP)
Primary Examiner: Reifsnyder; David A.
Assistant Examiner:
Attorney, Agent or Firm: Foley & Lardner

A filter for filtering oil flowing through a fluid flow passage extending through the inside and outside of a plug forming part of a relief valve of a vane pump. The filter comprises a roll-shaped sheet formed of steel sheet spring and taking a generally cylindrical form. The roll-shaped sheet has overlapping first and second end sections, which are opposite to each other in a peripheral direction of the roll-shaped sheet. The roll-shaped sheet is located in the fluid flow passage and fitted on an outer peripheral surface of the cylindrical member. The roll-shaped sheet is formed with many through-holes having the size to allow the fluid to pass through the through-holes but trap particles for removal.

DETAILED DESCRIPTION It is an object of the present invention to provide an improved filter for filtering fluid to flow through a fluid flow passage extending through inside and outside of a cylindrical member, which filter can overcome drawbacks encountered in similar conventional filters.
Another object of the present invention is to provide an improved filter for filtering fluid to flow through a fluid flow passage extending inside and outside of a cylindrical member, which filter is simple in construction and easy in installation to the cylindrical member while the same filter can be fitted on various cylindrical members having different sizes.
A further object of the present invention is to provide an improved filter for filtering fluid to flow through a fluid flow passage extending through inside and outside of a cylindrical member, which filter is small-sized to facilitate production thereof, lowering a production cost thereof.
A filter according to the present invention is for filtering fluid flowing through a fluid flow passage extending through inside and.
outside of a cylindrical member.
The filter comprises a roll-shaped sheet formed of a sheet material having an elasticity and taking a generally cylindrical form.
The roll-shaped sheet has first and second end sections, which are opposite to each other in a peripheral direction of the roll-shaped sheet and overlap.
The roll-shaped sheet is located in the fluid flow passage and fitted on an outer peripheral surface of the cylindrical member.
The roll-shaped sheet is formed with a plurality of through-holes having a size to allow the fluid to pass through the through-holes and to trap particles to be removed.
According to the present invention, the filter is simplified in structure, and small-sized thereby facilitating production and lowering production cost.
Additionally, the filter can be readily installed in position by virtue of the elasticity of the sheet material thereby to facilitate the installation operation.
Furthermore, since the filter is changeable in its inner diameter by virtue of the elasticity of the sheet material, the filter can be fitted on a variety of cylindrical members having different diameters

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