Valves and valve actuation – Reciprocating valve – Diaphragm
Reexamination Certificate
2006-10-05
2009-10-27
Fristoe, Jr., John K (Department: 3753)
Valves and valve actuation
Reciprocating valve
Diaphragm
C251S061100, C137S597000
Reexamination Certificate
active
07607641
ABSTRACT:
One or more diaphragm valves are integrated as part of a cover of a microfluidic cassette cartridge. A rigid body portion includes one or more recessed valve areas and a plurality of fluid channels. A recessed valve area is disposed along either a bottom surface or a top surface of the rigid body portion. An inlet fluid channel and an outlet fluid channel are formed within the rigid body portion of each recessed valve area. A flexible membrane cover is sealed over the bottom surface of the body portion, and another flexible membrane cover is sealed over the top surface. A portion of the membrane cover that covers a recessed valve area functions as a valve membrane of the diaphragm valve. The flexible membrane functions as both a cover of the cartridge, thereby sealing and enclosing the appropriate channels, and a valve membrane of the diaphragm valve.
REFERENCES:
patent: 4852851 (1989-08-01), Webster
patent: 5765591 (1998-06-01), Wasson et al.
patent: 5816457 (1998-10-01), Croft
patent: 6615871 (2003-09-01), Ohmi et al.
patent: 6705345 (2004-03-01), Bifano
patent: 7216528 (2007-05-01), Gamache et al.
Fristoe, Jr. John K
Haverstock & Owens LLP
MicroFluidic Systems, Inc.
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