CARTRIDGE FOR ANALYZING A FLUID SAMPLE
First Claim
1. A cartridge comprising:
- a) a body defining at least first and second channels and a conical valve seat positioned between the channels; and
b) an elastic membrane for establishing a circular seal with the valve seat to prevent the flow of fluid between the channels.
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Abstract
A cartridge for analyzing a fluid sample has a body defining at least first and second channels and a cavity separating the channels. An end of the first channel is positioned on a first side of the cavity, and an end of the second channel is positioned on a second side of the cavity. The cavity is defined by a first curved surface positioned adjacent the end of the first channel, a second curved surface positioned adjacent the end of the second channel, and at least a third surface between the first and second curved surfaces. The cartridge also comprises an elastic membrane for establishing a seal with the first and second curved surfaces to prevent the flow of fluid between the channels. The third surface is recessed from the first and second surfaces to provide a gap between the membrane and the third surface when the membrane is pressed against the first and second surfaces. A cartridge having a conical valve seat is also disclosed.
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Citations
10 Claims
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1. A cartridge comprising:
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a) a body defining at least first and second channels and a conical valve seat positioned between the channels; and
b) an elastic membrane for establishing a circular seal with the valve seat to prevent the flow of fluid between the channels. - View Dependent Claims (2)
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3. A cartridge comprising:
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a) a body having formed therein;
i) a chamber;
ii) a conical valve seat in fluid communication with the chamber; and
iii) a channel extending from the valve seat; and
b) an elastic membrane for establishing a circular seal with the valve seat to prevent the flow of fluid between the chamber and the channel. - View Dependent Claims (4, 5)
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6. A cartridge comprising:
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a) a body defining;
i) at least first and second channels; and
ii) a cavity separating the channels, wherein an end of the first channel is positioned on a first side of the cavity, and wherein an end of the second channel is positioned on a second side of the cavity, and wherein the cavity is defined by;
a first curved surface positioned adjacent the end of the first channel;
a second curved surface positioned adjacent the end of the second channel; and
at least a third surface between the first and second curved surfaces; and
b) an elastic membrane for establishing a seal with the first and second curved surfaces to prevent the flow of fluid between the channels, wherein the third surface is recessed from the first and second surfaces to provide a gap between the membrane and the third surface when the membrane is pressed against the first and second surfaces. - View Dependent Claims (7, 8, 9, 10)
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Specification