Fluid reservoir with level measurement and a dosing system,...

Details Fluid reservoir with level measurement and a dosing system,... Fluid reservoir with level measurement and a dosing system,...

2005-06-28

2005-06-28

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

C073S30400R

Reexamination Certificate

active

06910377

ABSTRACT:
A liquid reservoir with level measurement includes a base body (10) and a channel (12) implemented in the base body and comprising an inlet (14) and an outlet (16), the dimensions of the cross-section of the channel being selected such that a liquid (18) which may be filled into the channel forms a liquid meniscus (20) which demarcates a section (12b) of the channel which is filled with liquid from an unfilled section (12a) of the channel in which no liquid is present, the position of the meniscus in relation to the channel being substantially independent of the orientation of the liquid reservoir. The liquid reservoir further includes detection means (32, 22, 24) for detecting the position of the liquid meniscus and/or the channel so as to obtain, from the position of the liquid meniscus, the level and/or a change in the level of the liquid reservoir. The inventive liquid reservoir is suitable as a low-priced drug reservoir particularly in connection with a capacitive level detection.

REFERENCES:
patent: 5224375 (1993-07-01), You et al.
patent: 5463228 (1995-10-01), Krause
patent: 5588963 (1996-12-01), Roelofs
patent: 5790422 (1998-08-01), Power et al.
patent: 43 06 064 (1993-02-01), None
patent: 19736178 (1999-01-01), None
patent: 19944331 (1999-08-01), None
patent: 458 405 (1991-11-01), None
patent: 62201068 (1989-02-01), None

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