Filtering member and method for manufacturing the same

Details Filtering member and method for manufacturing the same Filtering member and method for manufacturing the same

1979-09-06

1980-12-16

Cintins, Ivars C.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

2104972, B01D 2704

Patent

active

042396271

ABSTRACT:
A filtering member for use in a filter such as an oil filter for removing impurities of different sizes contained in a fluid such as a working oil in an oil pressure apparatus comprises a cylindrical body made of resilient or flexible and porous material such as fabrics, porous synthetic resin, etc, the porosity of the cylindrical body decreasing gradually toward a center thereof. The filtering member can be easily and inexpensively manufactured by winding or deforming a sheet like member made of resilient material having a uniform porosity over its thickness into a cylindrical body in such a manner that an outer portion is expanded or stretched, but an inner portion is compressed.

REFERENCES:
patent: 2083546 (1937-06-01), Aldham
patent: 3807570 (1974-04-01), Allan

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