Apparatus for filling a sample volume defining device
First Claim
1. A sample volume defining device for separating at least one defined volume of a liquid sample from a relatively larger undefined volume of said sample, said device comprising:
- a first body and a second body moveable relative to each other;
said first body having at least one cavity having a defined volume in a form of recess on a surface of said first body, said cavity having an elongated shape with a long axis and a short axis perpendicular thereto, and having a cross section, along said long axis, of a wedge like shape with a first end wall and an opposing second end wall of different slopes, said first end wall having a slow descending slope and said second end wall having a steep slope, respectively;
said cavity being orientated with said first end wall at an up-flow end and said second end wall at a down-flow end;
said second body including a sealing and scraper means slidable along said surface and over said at least one cavity of said first body upon relative movement of said bodies;
a channel formed between said first and second bodies, enclosing an area around said cavity on said surface of said first body;
said channel having larger width and length than those of said cavity; and
an inlet opening disposed at said up-flow end and beyond said cavity with a distance along said surface of said first body from said cavity and a further opening to ambient air disposed at said down-flow end of said cavity;
said inlet opening adapted to fill a liquid sample therethrough into said channel;
both openings in communication with said channel between said first and second bodies for filling said liquid sample;
wherein when said liquid sample is filled through said inlet opening into said channel, said liquid sample flows on said surface of said first body into said cavity from said first end wall having said slow descending slope to fill said cavity; and
wherein when said first body is slid against said second body, said sealing and scraper means scrapes said liquid sample outside said cavity, obtaining said defined volume of said liquid sample in said cavity.
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Abstract
An apparatus for filling a sample volume defining device for separating at least one small defined volume of a liquid sample from a relatively larger undefined volume of said sample, said device including a first body and a second body movable relative to each other, whereby said first body has at least one cavity in a surface thereof, said at least one cavity having said defined volume. One of said first or said second body has at least one inlet opening adapted to be placed in a drop of the liquid sample. A defined channel is provided between said first and second body, which channel has fluid connection with said at least one opening and at least beyond said at least one cavity whereby the dimensions of said channel being such that said channel and said at least one cavity is filled with said liquid sample.
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Citations
20 Claims
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1. A sample volume defining device for separating at least one defined volume of a liquid sample from a relatively larger undefined volume of said sample, said device comprising:
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a first body and a second body moveable relative to each other;
said first body having at least one cavity having a defined volume in a form of recess on a surface of said first body, said cavity having an elongated shape with a long axis and a short axis perpendicular thereto, and having a cross section, along said long axis, of a wedge like shape with a first end wall and an opposing second end wall of different slopes, said first end wall having a slow descending slope and said second end wall having a steep slope, respectively;
said cavity being orientated with said first end wall at an up-flow end and said second end wall at a down-flow end;
said second body including a sealing and scraper means slidable along said surface and over said at least one cavity of said first body upon relative movement of said bodies;a channel formed between said first and second bodies, enclosing an area around said cavity on said surface of said first body;
said channel having larger width and length than those of said cavity; andan inlet opening disposed at said up-flow end and beyond said cavity with a distance along said surface of said first body from said cavity and a further opening to ambient air disposed at said down-flow end of said cavity;
said inlet opening adapted to fill a liquid sample therethrough into said channel;
both openings in communication with said channel between said first and second bodies for filling said liquid sample;wherein when said liquid sample is filled through said inlet opening into said channel, said liquid sample flows on said surface of said first body into said cavity from said first end wall having said slow descending slope to fill said cavity; and
wherein when said first body is slid against said second body, said sealing and scraper means scrapes said liquid sample outside said cavity, obtaining said defined volume of said liquid sample in said cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification