Variable orifice flow sensor

Details Variable orifice flow sensor Variable orifice flow sensor

1997-12-30

1999-10-26

Dombroske, George

Measuring and testing

Volume or rate of flow

Using differential pressure

7386153, G01F 137, G01F 122

Patent

active

059708018

ABSTRACT:
A variable orifice flow sensor includes a flow conduit member defining a flow orifice and fluidly connecting first and second fluid flow ports, a flapper of magnetizable sheet metal that is mounted in the conduit member by a hinge portion so that the flapper angularly deflects out of the plane of the orifice in response to fluid flow through the conduit member to vary the effective fluid flow cross-sectional area of the orifice in proportion to the flow rate of fluid through the conduit member, and a pressure sensing tap on either side of the flapper. A deflection-limiting surface is provided in the conduit member adjacent the hinge portion. The hinge portion abuts against the deflection-limiting surface when the flapper experiences an angular deflection at least equal to a predefined angle in response to a fluid flow rate that is at least equal to a predetermined value, whereby overstressing of the hinge portion is minimized. In addition, at least one magnet is provided in the conduit member adjacent the flapper, whereby the magnet generates a magnetic field that acts on the flapper so as to force it into a position that tends to minimize the zero flow gap that exists between the flapper and the portion of the conduit member that defines the fluid flow orifice when there is no fluid flow through the orifice.

REFERENCES:
patent: 2899981 (1959-08-01), Binks
patent: 2966133 (1960-12-01), Hube
patent: 3134404 (1964-05-01), Ziccardi
patent: 3370305 (1968-02-01), Goott et al.
patent: 3460168 (1969-08-01), Bruyne
patent: 3541945 (1970-11-01), Wexler
patent: 3613720 (1971-10-01), Welch
patent: 3857277 (1974-12-01), Moore
patent: 3891000 (1975-06-01), Melnick
patent: 3971253 (1976-07-01), Hini et al.
patent: 3995661 (1976-12-01), Van Fossen
patent: 4394958 (1983-07-01), Whitney et al.
patent: 4454768 (1984-06-01), Nansel
patent: 4456016 (1984-06-01), Nowacki et al.
patent: 4538620 (1985-09-01), Nowacki et al.
patent: 4605408 (1986-08-01), Carpentier
patent: 4729244 (1988-03-01), Furuse
patent: 4874012 (1989-10-01), Velie
patent: 4989456 (1991-02-01), Stupecky
patent: 4993269 (1991-02-01), Guillaume et al.
patent: 5038621 (1991-08-01), Stupecky
patent: 5687767 (1997-11-01), Bowers

Affiliated with

Also associated with

Rating

Variable orifice flow sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable orifice flow sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable orifice flow sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-751487