Filter

Details Filter Filter

1996-06-18

1998-06-09

Savage, Matthew O.

Liquid purification or separation

Plural distinct separators

Filters

210440, 210487, 2104931, 21049701, B01D 2706

Patent

active

057627924

ABSTRACT:
This invention pertains to a filter in general and particularly to a filter for use in filtering hydraulic oil circulating in a hydraulic system provided for a hydraulic machine. The filter is formed in a loop and includes at least two filtering materials having different filtration porosities. Those filtering materials are arranged in the circumferential direction of the loop. Since filtering materials are arranged in the circumferential direction, the filter can be manufactured at the same size as the existing filters so that it can be accommodated in the existing filter cases. Also, since the filter has more than one filtration accuracies, it is capable of catching impurities of various sizes. In operation, most of the liquid to be filtered tends to pass through the less fine filtration martial. Thus, the filter creates a small pressure loss.

REFERENCES:
patent: 3283904 (1966-11-01), Buckmann et al.

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