Additive dispensing fluid filter
First Claim
1. A filter for filtering a liquid, said filter comprising a filter housing with at least one liquid inlet and at least one liquid outlet, and a filter element arranged in a sealing manner between the inlet and outlet so that the filter element separates a filtered liquid side from an unfiltered liquid side, wherein an additive is provided in the housing which when contacted by the liquid being filtered releases an active ingredient into the liquid, said additive being encased in a liquid-soluble material which dissolves upon coming in contact with the liquid being filtered to expose the additive to the liquid.
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Accused Products
Abstract
A filter for filtering a liquid, such as coolant for an internal combustion engine, having a filter housing with at least one liquid inlet and at least one liquid outlet, a filter element which is arranged in a sealing manner between the inlet and outlet so that the filter element separates a filtered liquid side from an unfiltered liquid side, and having an additive or inhibitor disposed in the housing such that when contacted by liquid passing through the filter, the additive is released into the liquid, in which the additive is tightly encased in a liquid-soluble material which dissolves on coming in contact with the liquid being filtered.
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Citations
20 Claims
- 1. A filter for filtering a liquid, said filter comprising a filter housing with at least one liquid inlet and at least one liquid outlet, and a filter element arranged in a sealing manner between the inlet and outlet so that the filter element separates a filtered liquid side from an unfiltered liquid side, wherein an additive is provided in the housing which when contacted by the liquid being filtered releases an active ingredient into the liquid, said additive being encased in a liquid-soluble material which dissolves upon coming in contact with the liquid being filtered to expose the additive to the liquid.
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12. A method of introducing an additive into a liquid to be filtered, said method comprising:
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encasing the additive in a material soluble in the liquid to be filtered;
disposing the encased additive in a liquid filter;
connecting the liquid filter to a liquid circuit in which the liquid to be filtered circulates so that the liquid to be filtered flows through the filter; and
contacting the encased additive with the liquid to be filtered to dissolve the liquid-soluble material, whereby the additive is exposed to the liquid and is released into the liquid. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification