Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1986-07-07
1988-11-22
Richman, Barry S.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
436 68, 436 64, 436172, 422 86, 422101, 422102, 422104, 210232, 210445, 21032175, G01N 2105, G01N 3348
Patent
active
047864745
ABSTRACT:
An apparatus for sensing characteristics of a substance, such as blood, including a membrane support having first and second recesses and first and second dissimilar membranes extending over the first and second recesses, respectively. The membrane support has a groove between the recesses, and edge portions of the membranes extend into the groove on the side thereof adjacent the first recess. A retaining bar is received within the groove, and the membranes are tightly held between the retaining bar and the wall of the groove to form a smooth, essentially continuous surface. The membrane support forms a portion of a flow passage so that blood can flow along the membranes. First and second sensors are mounted on the sides of the first and second membranes opposite the flow passage for sensing characteristics of the blood. The first and second sensors engage the first and second membranes, respectively, to tension the membranes.
REFERENCES:
patent: 3980564 (1976-09-01), Bardin et al.
patent: 4003707 (1977-01-01), Lubbers et al.
patent: 4529495 (1985-07-01), Marsoner
patent: 4640820 (1987-02-01), Cooper
Siggaard-Andersen; The Acid-Base Status of the Blood, 4th Edition, Williams & Wilkins Co., 1974, pp. 171-173.
Cardiovascular Devices, Inc.
Kummert Lynn M.
Peterson Gordon L.
Richman Barry S.
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