초록 ▼

A fluid filter is disclosed which separates gas from liquid and vents the separated gas from the filter. The filter includes a vented housing through which the fluid stream passes. Liquid-wetting filter means carried in the housing in the path of the fluid stream permits the passage of liquid only.

A fluid filter is disclosed which separates gas from liquid and vents the separated gas from the filter. The filter includes a vented housing through which the fluid stream passes. Liquid-wetting filter means carried in the housing in the path of the fluid stream permits the passage of liquid only. Gas separated from the fluid is vented through vent opening means which is covered by a liquid-repellent filter to permit the passage of gas only. An automatic, pressure sensitive control means may be used to seal the vent opening means against the entry of ambient air but to automatically release separated gas from the filter. The liquid-repellent filter may be secured to the housing by a mechanical bond between the housing and a fibrous backing carried by the filter, or a continuous band of medical grade tape may be used to attach the filter to the housing.

대표청구항 ▼

A gas separating and venting filter comprising: a plastic heat-deformable plastic housing having walls defining an interior chamber, inlet opening means in said housing for conveying fluid into said chamber, one of said walls comprising liquid-wetting filter means for passing liquid only therethroug

A gas separating and venting filter comprising: a plastic heat-deformable plastic housing having walls defining an interior chamber, inlet opening means in said housing for conveying fluid into said chamber, one of said walls comprising liquid-wetting filter means for passing liquid only therethrough, outlet means downstream of said liquid-wetting filter means for conveying liquid therefrom, vent opening means in said housing communicating between the outside of said housing and said interior chamber to vent gas from said chamber, and planar liquid-repellent filter means covering said vent opening means and having a peripheral edge portion overlying said housing and sealed thereto to permit the passage of gas but to prevent liquid from escaping through said vent opening means, said liquid-repellent filter means comprising a plastic liquid-repellent filter membrane with a plastic fibrous backing disposed between said membrane and said housing, said filter means having a higher melt temperature than said housing, said seal between said filter means and said housing comprising a continuous mechanical bond formed between said fibrous backing and said housing in which portions of said housing fill the interstices in portions of said fibrous backing.