Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2005-07-12
2005-07-12
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
Reexamination Certificate
active
06917886
ABSTRACT:
A differential pressure sensor based on pressure induced micro-flow that includes two connecting hoses that are considered when the pressure sensor is calibrated. The inventive differential pressure sensor includes a flexible hose as part of the device itself, and is calibrated with the flexible hose in place (consequently, a usable hose length needs to be specified beforehand). Calibration constants for the air flow channel are determined and stored in non-volatile memory, and used to provide accurate pressure measurements. Thus, impedance in the air flow path introduced by the flexible hose is considered when the pressure sensor is calibrated. That insures that any measurement of air flow is not adversely effected by the introduction of an impedance in the air flow path previously not considered by the sensor. The present invention thus provides a self-contained differential pressure sensing device suitable for detecting changes in pressure for applications where a small amount of leakage is acceptable.
REFERENCES:
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4562731 (1986-01-01), Nishimura et al.
patent: 4566320 (1986-01-01), Bohrer
patent: 4648270 (1987-03-01), Johnson et al.
patent: 4719806 (1988-01-01), Craigen et al.
patent: 4959990 (1990-10-01), Morris
patent: 5178153 (1993-01-01), Einzig
patent: 5301126 (1994-04-01), Nishimura et al.
patent: 5311762 (1994-05-01), Drexel
patent: 5535633 (1996-07-01), Kofoed et al.
patent: 5819721 (1998-10-01), Carr et al.
patent: 5992686 (1999-11-01), Cline et al.
patent: 6125695 (2000-10-01), Alvesteffer et al.
patent: 6220080 (2001-04-01), Fauque
patent: 6588268 (2003-07-01), Yamagishi et al.
Cohen Adam
Tang Josh
Barlow John
Bhat Aditya
Stroock & Stroock & Lavan LLP
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