Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1989-07-17
1990-07-03
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
7386174, G01F 124, G01F 128
Patent
active
049380761
ABSTRACT:
A target fluid flow indicator gauge comprising a non-magnetic housing defining inflow and outflow ports and a cross channel including a rounded portion that is curvilinear about an axial center that is coaxial with a fluid flow central axis through the gauge, with the channel rounded portion lying in a plane that extends normally of such axial centers and functions as a conduit for the fluid flow that is to be measured, a leaf spring adjustably and cantilever mounted in an upper portion of the housing chamber and adjacent one end of the spring, which leaf spring at the other end of same is fixed to a rigid lever arm that extends diametrically across the channel rounded portion, an orifice coaxial with said axis through which the fluid flow is directed into the chamber portion and defining a throat portion of novel configuration at the downstream end thereof that opens into the channel portion, with the lever arm mounting a target in centered relation within the orifice throat portion in coplanar, close fitting relation to the upstream end thereof, with the housing directing fluid flow into the channel against the target and out of the chamber in a predetermined fluid flow direction through the housing and the lever arm carrying a driving magnet assembly adjacent the target that is magnetically coupled to an externally located follower magnet assembly that acts to pivot an indicator pointer to provide an output that is linear over the range of the gauge.
REFERENCES:
patent: 881586 (1908-03-01), Howe-Gould
patent: 1114684 (1914-09-01), Vaughan
patent: 2735299 (1956-02-01), Blackburn et al.
patent: 3331388 (1967-07-01), Evans et al.
patent: 3862416 (1975-01-01), Phillips et al.
patent: 4030365 (1977-06-01), Phillips et al.
patent: 4729782 (1988-03-01), Furuse
patent: 4841782 (1989-06-01), Buchanan
Dwyer Instruments, Inc.
Goldstein Herbert
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