Thermal mass flow rate sensor including bypass passageways...

Details Thermal mass flow rate sensor including bypass passageways... Thermal mass flow rate sensor including bypass passageways...

2006-09-19

2006-09-19

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Thermal type

C073S202500

Reexamination Certificate

active

07107834

ABSTRACT:
A sensing apparatus for use in a mass flow rate sensor for measuring a fluid flow rate includes a main conduit for containing a fluid flow, and a sensor passageway for tapping a portion of the fluid flow from the main conduit at a first location, and returning the portion of the fluid flow to the conduit at a second location. At least one bypass passageway, which may be provided in the form of a tube, is positioned in the main conduit between the first and second locations, and the bypass passageway is provided with non-negligible entrance effects that are substantially equal to entrance effects of the sensor passageway, so that a bypass ratio of the apparatus remains constant. A mass flow rate sensor of the present disclosure accurately measures any type of gas but only requires calibration in only one reference gas.

REFERENCES:
patent: 3938384 (1976-02-01), Blair
patent: 4487062 (1984-12-01), Olin et al.
patent: 4522058 (1985-06-01), Ewing
patent: 4571801 (1986-02-01), Ewing
patent: 4961344 (1990-10-01), Rodder
patent: 5090241 (1992-02-01), Kobayashi
patent: 5295394 (1994-03-01), Suzuki
patent: 5332005 (1994-07-01), Baan
patent: 5750892 (1998-05-01), Huang et al.
patent: 5763774 (1998-06-01), Ha et al.
patent: 5824894 (1998-10-01), Lucas et al.
patent: 6119730 (2000-09-01), McMillan
patent: 6247495 (2001-06-01), Yamamoto et al.
patent: 6422256 (2002-07-01), Balazy et al.

Affiliated with

Also associated with

Rating

Thermal mass flow rate sensor including bypass passageways... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermal mass flow rate sensor including bypass passageways..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal mass flow rate sensor including bypass passageways... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3577180