Patent US4249164A successfully refreshed from Google Patents.
US4249164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow meter
Assignee: Individual
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Filing: 1979-05-14
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Granted: 1981-02-03
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Expires: 1999-05-14
Abstract
Abstract A delta-P transmitter generating a signal corresponding to the differential pressure produced by a primary element installed in a conduit through which a fluid flows, comprising the primary element and a transducer implanted in the primary element to generate a signal corresponding to the differential pressure with which may be combined the signals generated by a temperature transducer and/or an absolute pressure transducer to generate an output signal corresponding to the weight or mass rate of fluid flow.
Inventors
- 👤 Vincent V. Tivy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:29
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/363; G01F1/40; G01F1/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A delta-P transmitter for producing an output signal varying in functional relationship with the rate of fluid flow through a conduit, comprising, a primary element consisting of a rigid disk for installation in the conduit and provided with an orifice for the flow of fluid therethrough producing a differential pressure between the inlet and outlet sides of said disk varying in functional relation to the rate of fluid flow, a first aperture between the inlet and outlet sides of said disk, a first flexure diaphragm sealing said aperture flexing in proportion to said differential pressure and a transducer operatively connected to said diaphragm generating an output signal proportional to the flexing of said diaphragm.
Claim 2
Dependent Claim
114 words
A delta-P transmitter for producing an output signal varying in functional relationship with the rate of fluid flow through a conduit, comprising, a primary element consisting of a rigid disk for installation in the conduit and provided with an orifice for the flow of fluid therethrough producing a differential pressure between the inlet and outlet sides of said disk varying in functional relation to the rate of fluid flow, a first aperture between the inlet and outlet sides of said disk, a first flexure diaphragm sealing said aperture flexing in proportion to said differential pressure and a transducer operatively connected to said diaphragm generating an output signal proportional to the flexing of said diaphragm.
Claim 3
Dependent Claim
61 words
A delta-P transmitter as set forth in claim 1 further including a hermetically sealed liquid filler chamber comprising said first and a second flexure diaphragm secured to and separated by a supporting rim implanted in said first aperture and said transducer being mounted within said chamber responsive to the flexing of said diaphragms in accordance with changes in said differential pressure.
Claim 4
Dependent Claim
16 words
A delta-P transmitter as set forth in claim 1 wherein said transducer is a strain gauge.
Claim 5
Dependent Claim
31 words
A delta-P transmitter as set forth in claim 1 further including a temperature transducer implanted in said primary element for producing an output signal proportional to the temperature of the fluid.
Claim 6
Dependent Claim
32 words
A delta-P transmitter as set forth in claim 1 further including an absolute pressure transducer implanted in said primary element producing an output signal proportional to the absolute pressure of the fluid.
Claim 7
Dependent Claim
103 words
A delta-P transmitter as set forth in claim 1 wherein said primary element is provided with a second aperture further including a duplex absolute pressure transducer comprising an evacuated chamber implanted in said second aperture having a first transducer responsive to the pressure on the inlet side of said primary element for producing an output signal proportional to the absolute pressure on the inlet side of said primary element and a second transducer responsive to the pressure on the outlet side of said primary element for producing an output signal proportional to the absolute pressure on the outlet side of said primary element.
Claim 8
Dependent Claim
51 words
In combination with a delta-P transmitter as set forth in claim 6 further including means responsive to the output signals of said duplex absolute pressure transducer generating an output signal proportional to the difference between said signals and means generating an alarm signal when said output signal exceeds a predetermined value.
Claim 9
Dependent Claim
41 words
A delta-P transmitter as set forth in claim 1 wherein said transducer comprises a variable capacitor having a stationary plate and a cooperating flexure diaphragm movable toward and away from said stationary plate in accordance with changes in said differential pressure.
Claim 10
Dependent Claim
42 words
A delta-P transmitter as set forth in claim 1 further including a wireway for transmitting said signal to a receiving device comprising a plurality of conductors packed in an insulating material hermetically sealed in a metal sheath implanted in said primary element.
Claim 11
Dependent Claim
74 words
In combination with a delta-P transmitter as set forth in claim 1 wherein said output signal varies in non-linear relationship to the weight rate of fluid flow at a predetermined density of the fluid, further including means generating a second signal corresponding to changes in the density of the fluid and computer means responsive to said signals generating a second output signal linearly proportional to the weight rate of fluid flow through said conduit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |