Loading patent…
AssigneeImas Technology Ltd.
InventorsDavid James Bray, Alexander Philip Davidson
Estimating the term…
A filter has a first filter layer made of TiO.sub.2 of Ti.sub.4 O.sub.7 particles deposited on a second filter layer by stainless steel particles. The first layer has a smaller pore size than the second layer. The construction of the filter, the relative thicknesses of the layers and the resistances thereof to movement therethrough of electrolytically generated gas located between the two layers when the filter is permeated with liquid are such that the gas reaches the upstream side of the filter before the downstream side. In one embodiment stainless steel particles are sintered and rolled with a textured roller before ceramic particles are applied and rolled. An intermediate layer of metal particle peaks and ceramic filled troughs is thus provided which has high tortuosity. The resistance to flow at the metal/ceramic interface can be increased by electrodeposition of metal there.
A filter comprising a first electrically conductive filter layer and a second electrically conductive filter layer downstream of the first layer, the first layer being less conductive than said second layer and having a smaller pore size than the second layer, said filter further comprising an electrically conductive intermediate layer between the first and second filter layers, the intermediate layer being more conductive than the first layer and having a resistance to movement therethrough of electrolytically generated gas when the filter is permeated with liquid, said resistance being of no less magnitude than that of the first layer so that said gas reaches the upstream side of the filter before said gas reaches the downstream side, the porosity of the said intermediate layer being at least 0.1% lower than that of the first layer.
A filter comprising a first electrically conductive filter layer and a second electrically conductive filter layer downstream of the first layer, the first layer being less conductive than the second layer and the first layer having a smaller pore size than the second layer, said filter having a further layer downstream of the second layer with a resistance to movement therethrough of electrically generated gas when the filter is permeated with liquid, said resistance being greater than the resistance to movement of electrically generated gas through the second layer whereby said gas will pass to the upstream side of the filter before the downstream side.
Dependencies are inferred from the claim text.