Syringe with filter, and filter therefor
First Claim
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1. A syringe comprising an opening, and a one-way filter which permits flow of fluid into the syringe, through the opening, unfiltered but which filters the fluid through a filter membrane when expelled from the syringe, the opening, wherein the filter membrane has a cut therethrough to form a permeable flap of the filter membrane portion and a hinge line, the permeable flap of the filter membrane portion moving to permit the fluid to enter the syringe unfiltered.
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Abstract
A syringe comprising a one-way filter which permits flow of fluid into the syringe unfiltered but which filters the fluid when expelled from the syringe.
43 Citations
4 Claims
- 1. A syringe comprising an opening, and a one-way filter which permits flow of fluid into the syringe, through the opening, unfiltered but which filters the fluid through a filter membrane when expelled from the syringe, the opening, wherein the filter membrane has a cut therethrough to form a permeable flap of the filter membrane portion and a hinge line, the permeable flap of the filter membrane portion moving to permit the fluid to enter the syringe unfiltered.
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4. A one-way filter which permits flow of fluid unfiltered into a syringe having an opening, but which filters the fluid when expelled from the syringe through the openings, comprising a filter membrane having a cut therethrough to form a permeable flap portion of the filter membrane and a hinge line, the flap permeable portion moving to permit the fluid to enter the syringe unfiltered.
Specification