Measuring and testing – Volume or rate of flow – By measuring thrust or drag forces
Patent
1987-09-11
1989-06-27
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring thrust or drag forces
73DIG5, G01F 128
Patent
active
048417823
ABSTRACT:
A target fluid flow indicator gauge comprising a non-magnetic housing defining a target chamber having a rounded portion that is curvilinear about an axial center that is coaxial with a fluid flow central axis through the gauge, with the chamber rounded portion lying in a plane that extends normally of such axial centers, a leaf spring mounted in the housing chamber and adjacent one end of the spring, which leaf spring at the other end of same has fixed to a rigid lever arm that mounts a disc-like target in centered relation within the chamber portion with the housing further defining inflow and outflow fluid ports on opposite sides of and centered on the axial centers and on the target for directing fluid flow against the target and out of the chamber; the lever arm carries a driving magnet assembly adjacent the target that is magnetically coupled through an imperforate wall structure of the housing to an externally located follower magnet assembly that acts through a short lever arm to pivot an indicator pointer that is journalled to pivot about an axis that extends crosswise of the fluid flow direction, to provide an output that is linear over the range of the gauge, with the leaf spring being adjustable to accommodate variant ranges of fluid flow rates.
REFERENCES:
patent: 881586 (1908-03-01), Howe-Gould
patent: 3862416 (1975-01-01), Phillips et al.
patent: 4030365 (1977-06-01), Phillips et al.
patent: 4051725 (1977-10-01), Schloss
patent: 4263813 (1981-04-01), Gryn
Dwyer Instruments, Inc.
Goldstein Herbert
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