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US3979957A
Expired / Lapsed
US
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Flow meter
Assignee: Hydril UK Ltd
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Filing: 1975-02-12
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Granted: 1976-09-14
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Expires: 1995-02-12
Abstract
Abstract A turbine-type flow meter is described as a construction enabling easy access to all parts for cleaning, servicing and replacement. Specifically, a three piece construction is presented including end caps housing vanes and a central main body for housing a metering rotor. The end cap construction provides the bearings for the rotor and the necessity for flow straighteners is eliminated by pre-selecting a sufficient distance between the rotor and vanes. Flow is measured by electrically counting the rotations of the rotor and means are provided both for sensing gaseous substances and to enable bi-directional flow.
Inventors
- 👤 Robert J. Rutgerson
- 👤 Malcom J. Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:02
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A flow meter construction for use in producing an electrical output indicating the amount of flow therein comprising a pair of symmetrically and axially arranged separating end caps each including an end cap shell, an axially aligned bearing support assembly and vanes extending from said assembly to said end cap shell, a main body between said end caps defining therewithin an inner main body surface, said main body being axially aligned with said end caps and said main body surface defining with said end cap shells a continuous, cylindrical flow meter conduit, a magnetic rotor, supported by said assemblies and within said main body, whose rotation is responsive to flow through said flow meter conduit, a magnetic impulse counter probe for creating a magnetic field in the area of said rotor for generating pulses proportional to flow through said flow meter conduit and external clamping means for holding said end caps to said main body, the distance between said vanes and said rotor being greater than one-fourth the diameter of said flow meter conduit.
Claim 2
Dependent Claim
174 words
A flow meter construction for use in producing an electrical output indicating the amount of flow therein comprising a pair of symmetrically and axially arranged separating end caps each including an end cap shell, an axially aligned bearing support assembly and vanes extending from said assembly to said end cap shell, a main body between said end caps defining therewithin an inner main body surface, said main body being axially aligned with said end caps and said main body surface defining with said end cap shells a continuous, cylindrical flow meter conduit, a magnetic rotor, supported by said assemblies and within said main body, whose rotation is responsive to flow through said flow meter conduit, a magnetic impulse counter probe for creating a magnetic field in the area of said rotor for generating pulses proportional to flow through said flow meter conduit and external clamping means for holding said end caps to said main body, the distance between said vanes and said rotor being greater than one-fourth the diameter of said flow meter conduit.
Claim 3
Dependent Claim
83 words
A flow meter construction according to claim 1 wherein said main body further defines first and second openings through said surface, an air probe extending through said first opening into said conduit for controlling the production of said electrical output and a trim vane extending through said second opening on the opposite side axially of said magnetic impulse counter probe from said air probe, attached to said counter probe and arranged to produce directional turbulence within said conduit and to enable bi-directional flow.
Claim 4
Dependent Claim
16 words
A flow meter construction according to claim 1 wherein said assembly removably supports said magnetic rotor.
Claim 5
Dependent Claim
28 words
A flow meter construction according to claim 1 wherein said end caps and said main body together define outwardly directed protrusions for mating with said external clamping means.
Claim 6
Dependent Claim
20 words
A flow meter construction according to claim 1 wherein sanitary seals are between said end caps and said main body.
References Cited (Backward Citations)
US3433071A
Cited
US3610039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |