Regenerative hygroscopic filter and method
First Claim
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1. A regenerative hygroscopic filter comprising:
- a housing containing an inlet port and an outlet port; and
,a hydrophilic filter element positioned within said housing between said inlet and outlet ports, and operatively arranged to filter solid particulate matter and water when gas passes into said inlet port and through said filter element, and to release water via said inlet port when gas passes from said outlet port through said filter element, wherein said filter element comprises an inherently gas permeable substrate treated with a hydrophilic substance, wherein said substrate is impervious to solid particulate matter.
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Abstract
A regenerative hygroscopic filter having a housing containing an inlet port and an outlet port, and, a hydrophilic filter element positioned within the housing and disposed between the inlet and outlet ports, and operatively arranged to filter solid particulate matter and water when gas passes into the inlet port and through the filter element, and to release water via the inlet port when gas passes from the outlet port through the filter element.
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Citations
13 Claims
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1. A regenerative hygroscopic filter comprising:
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a housing containing an inlet port and an outlet port; and
,a hydrophilic filter element positioned within said housing between said inlet and outlet ports, and operatively arranged to filter solid particulate matter and water when gas passes into said inlet port and through said filter element, and to release water via said inlet port when gas passes from said outlet port through said filter element, wherein said filter element comprises an inherently gas permeable substrate treated with a hydrophilic substance, wherein said substrate is impervious to solid particulate matter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of filtering intake air and exhaust air in a hydraulic system having a hydraulic reservoir with an air space above hydraulic fluid in said reservoir, comprising:
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filtering solid particulate matter and water from intake air which enters said reservoir by means of a regenerative hygroscopic filter; and
,releasing water from said filter when exhaust air is removed from said air space, wherein said filtering is done with a filter element comprising a substrate treated with a hydrophilic substance. - View Dependent Claims (10, 11, 12, 13)
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Specification