Patent ID: 7638093

Claim:
A flow immunoassay testing device for testing a specimen, said device comprises: a supply of buffer solution; an amount of conjugate specific to a condition being tested; a first chamber shaped and dimensioned to accept said specimen and be subjectable to said supply of buffer solution to create a fluid comprising said specimen and said solution; said first chamber holding said amount of conjugate; a siphon enhancing absorbing pad; a second chamber in fluid communication with said first chamber, said second chamber siphoningly holding at least one chromatographic testing strip; a reservoir having a given capacity and being located to interrupt a flow of said fluid between said first and second chambers; said reservoir having an escape port in an upper part thereof; and said at least one strip having an upper edge dipping into said reservoir through said escape port and a downward pitch between said port and a lower portion in contact with said pad to form a siphon between said reservoir and said pad; whereby an amount of said fluid is accumulated in said reservoir and incubated to allow a first affinity binding reaction to occur within said amount of said fluid to form an incubated liquid which flows slowly out of said reservoir through said escape port and into said at least one strip under the effect of capillarity, gravity and siphoning forces.