Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Calorimeter
Patent
1989-05-19
1992-09-15
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Calorimeter
422 56, 422 57, 435 71, 435 792, 435 794, 435970, 436170, 436169, 436808, G01N 3122, G01N 3353, G01N 2177
Patent
active
051476096
ABSTRACT:
There is described an assay element suitable for use in an automated analytical test instrument for assaying a fluid sample. The element includes a thin porous member possessing a high degree of capillarity such as a fibrous mesh pad supported within a guide defined by surfaces contiguous the porous member. The dimensions of the porous member and its degree of capillarity are such as to provide for capillary transport of fluid through the member. A fluid dispenser and a fluid collecting chamber are disposed contiguous to opposed ends of the porous member. The fluid dispenser is formed as a well with a port at the bottom of the well, the port being contiguous the porous member and having a ridge extending along a perimeter of the port. The ridge protrudes into the porous member a distance sufficient for entraining fluid present in the well to propagate within the member rather than along an interface between a surface of the member and guide surfaces which hold it in place. Reservoirs may also be provided in the housing for storing reagents, mixing fluids and diluting samples so as to provide a self contained assay element. Optionally, and preferably, there may be an opening in the housing to provide fluid access directly to the central area of the porous member.
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Maccarone Gaetano D.
PB Diagnostic Systems Inc.
Trembley T. A.
Warden Robert J.
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