US4399709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow meter
Assignee: Siemens AG
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Filing: 1981-02-23
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Granted: 1983-08-23
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Expires: 2001-02-23
Abstract
Abstract A flow meter is disclosed which comprises a rotary piston carrying at least one magnet, and a measuring transducer. The transducer comprises a multiplicity of magnetic field-sensitive components arranged in correspondence with the path of motion of the magnet. The magnetic field-sensitive components are arranged in groups which are coupled to a respective pulse edge-sensitive circuit such as a monostable multivibrator. The flow meter of the invention is particularly applicable as a liquid flow meter for foods.
Inventors
- 👤 Rudolf Diepold-Scharnitzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:56
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/06; G01F3/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A flow meter comprising a piston rotatably mounted in the flow meter, at least one magnet carried by the piston, a measuring transducer arranged adjacent to the piston and comprising a plurality of magnetic field-sensitive components arranged in correspondence with the path of motion of the magnet carried by the piston so as to be sequentially sensitive to the field of the magnet as the piston rotates, each magnetic field-sensitive component being operative to generate a pulse as the magnet is carried past the respective magnetic field-sensitive component, non-adjacent magnetic field sensitive components being coupled together according to a predetermined order to arrange the magnetic field-sensitive components in groups, the predetermined order depending on the number of groups, and an electric pulse edge-sensitive circuit coupled to each group of magnetic field-sensitive components for generating a pulse of relatively short duration in response to an edge of each pulse generated by the magnetic field-sensitive components.
Claim 2
Dependent Claim
154 words
A flow meter comprising a piston rotatably mounted in the flow meter, at least one magnet carried by the piston, a measuring transducer arranged adjacent to the piston and comprising a plurality of magnetic field-sensitive components arranged in correspondence with the path of motion of the magnet carried by the piston so as to be sequentially sensitive to the field of the magnet as the piston rotates, each magnetic field-sensitive component being operative to generate a pulse as the magnet is carried past the respective magnetic field-sensitive component, non-adjacent magnetic field sensitive components being coupled together according to a predetermined order to arrange the magnetic field-sensitive components in groups, the predetermined order depending on the number of groups, and an electric pulse edge-sensitive circuit coupled to each group of magnetic field-sensitive components for generating a pulse of relatively short duration in response to an edge of each pulse generated by the magnetic field-sensitive components.
Claim 3
Dependent Claim
77 words
The flow meter according to claim 1 wherein the magnetic field-sensitive components are disposed in numerical order corresponding to the path of motion of the magnet, the magnetic field sensitive components being connected in three groups, a first and fourth of the field-sensitive components being coupled together, a second and a fifth of the magnetic field-sensitive components being coupled together, and a third and a sixth of the magnetic field-sensitive components being coupled together, and so on.
Claim 4
Dependent Claim
42 words
The flow meter according to claim 1 wherein spacings between the magnetic field-sensitive components along the path of motion of the magnet are so chosen that each pulse is proportional to an equal part of the volume flowing through the flow meter.
Claim 5
Dependent Claim
44 words
The flow meter according to claim 1 and including a magnetically conductive plate disposed adjacent the magnetic field-sensitive components on the side thereof facing away from the magnet, the plate having a flat surface disposed perpendicularly to the axis of polarization of the magnet.
Claim 6
Dependent Claim
30 words
The flow meter according to claim 1 and including an OR circuit, the output of each of said electric circuits being coupled to a respective input of the OR circuit.
Claim 7
Dependent Claim
25 words
The flow meter according to claim 1 wherein the magnetic field-sensitive elements comprise Hall switches having a Hall probe and a switching amplifier coupled thereto.
Claim 8
Dependent Claim
14 words
The flow meter according to claim 6 wherein the probe and amplifier are integrated.
Claim 9
Dependent Claim
152 words
A flow meter comprising a piston rotatably mounted in the flow meter, at least one magnet carried by the piston, a measuring transducer arranged adjacent to the piston and comprising a plurality of magnetic field-sensitive components arranged in correspondence with the path of motion of the magnet carried by the piston so as to be sequentially sensitive to the field of the magnet as the piston rotates, a magnetically conductive plate disposed adjacent the magnetic field-sensitive components on the side thereof facing away from the magnet, the plate having a flat surface disposed perpendicularly to the axis of polarization of the magnet, each magnetic field-sensitive component being operative to generate a pulse as the magnet is carried past the respective magnetic field-sensitive component, and means coupled to the magnetic field-sensitive components for generating pulses of relatively short duration in response to an edge of the pulses generated by the magnetic field-sensitive components.
Claim 10
Dependent Claim
152 words
A flow meter comprising a piston rotatably mounted in the flow meter, at least one magnet carried by the piston, a measuring transducer arranged adjacent to the piston and comprising a plurality of magnetic field-sensitive components arranged in correspondence with the path of motion of the magnet carried by the piston so as to be sequentially sensitive to the field of the magnet as the piston rotates, a magnetically conductive plate disposed adjacent the magnetic field-sensitive components on the side thereof facing away from the magnet, the plate having a flat surface disposed perpendicularly to the axis of polarization of the magnet, each magnetic field-sensitive component being operative to generate a pulse as the magnet is carried past the respective magnetic field-sensitive component, and means coupled to the magnetic field-sensitive components for generating pulses of relatively short duration in response to an edge of the pulses generated by the magnetic field-sensitive components.
Claim 11
Dependent Claim
22 words
The flow meter according to claim 8 wherein said means comprises an electric pulse edge-sensitive circuit coupled to each magnetic field-sensitive component.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |