Filter arrangement
AssigneeMaquet Critical Care AB
InventorStefan Broborg
Life of this patent
Estimating the term…
Abstract
To connect and disconnect a filter in a gas flow system, a filter unit has a filter housing wherein an adsorption/absorption filter is movably arranged. The filter housing has two tube connectors for connecting the filter unit in a gas conducting passage. The filter unit also has a shifting element which is movable from a first to at least a second position. The first position allows the filter to substantially fill the gas conducting passage in a way that forces the gas in the gas flow system to pass through the filter, whereas the second position substantially removes the filter from the gas conducting passage, allowing the gas to pass through the filter unit without passing the filter.
Claims23
A filter unit comprising:
- a filter housing;
- said filter housing having an inner volume and first and second gas connectors respectively configured for connecting said filter housing to a gas conducting passage, said first and second gas connectors communicating with said inner volume and defining a portion of said gas conducting passage that proceeds through said inner volume of said filter housing;
- a filter in said inner volume of said filter housing, said filter being selected from the group consisting of adsorption filters and absorption filters, said filter consisting of a compressible filter material;
- a compressing element mounted in said filter housing for movement between a first position and a second position in said inner volume upon exposure to an external force;
- said compressing element, in said first position, causing said filter material and said compressing element to occupy and entirely fill said inner volume of said filter housing to substantially fill said portion of said gas conducting passage in said inner volume of said filter housing to force gas in said gas conducting passage to pass through said filter material;
- and
- said compressing element, in said second position, compressing said filter material to substantially displace said filter material into, and maintain said filter material in a compressed state that is entirely within said inner volume of said filter housing, said filter material in said compressed state causing gas in said gas conducting passage to proceed through said filter housing without interacting with said filter material.
Dependencies are inferred from the claim text.