Liquid absorbing filter assembly and system
AssigneeRIC Investments, LLC
InventorsBrian M. Fudge, Patrick Tuxbury, Kirk Johnson
Life of this patent
Estimating the term…
Abstract
A filter assembly for use in sidestream gas sampling assembly. The filter assembly of the present invention includes a hydrophilic member that is constructed from a porous material and is situated such that gas entering the filter assembly passes through at least a portion the hydrophilic member. In a further embodiment, the filter includes a hydrophobic member positioned downstream of the hydrophilic member. The hydrophobic member acts as a second line of defense against moisture reaching the sensing mechanism in the gas sampling assembly.
Claims13
A filter assembly for use in a sidestream gas sampling assembly comprising:
- a housing having an inlet, an outlet, and an inner wall defining a channel through the housing from the inlet to the outlet;
- a hydrophobic member disposed across the channel at a location proximate to the outlet;
- and a hydrophilic member having an inlet, an outlet, an outer wall, an inner surface and a pore volume, wherein the hydrophilic member is disposed along the channel, wherein the hydrophilic member inner surface is coextensive with the channel and at a location proximate to the hydrophobic member such fluid passing through the channel passes over at least a portion of the hydrophilic member before passing through at least a portion of the hydrophobic member.
A sidestream gas monitoring system comprising:
- (a) a sampling line having a first end and a second end, wherein the sampling line is adapted to carry a flow of gas from a patient circuit;
- (b) a filter assembly comprising:
- (1) a housing having an inlet adapted to be coupled to the second end of the sampling line, an outlet, and an inner wall defining a channel through the housing from the inlet to the outlet, (2) a hydrophobic member disposed across the channel at a location proximate to the outlet, and (3) a hydrophilic member having an inlet, an outlet, an outer wall, an inner surface and a pore volume, wherein the hydrophilic member is disposed along the channel, wherein the hydrophilic member inner surface is coextensive with the channel and at a location proximate to the hydrophobic member such fluid passing through the channel passes over at least a portion of the hydrophilic member before passing through at least a portion of the hydrophobic member;
- (c) a sample cell operatively coupled to an outlet of the housing;
- and (d) a detecting system adapted to measure a constituent of gas contained within the sample cell.
Dependencies are inferred from the claim text.