US3874235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston meter for measuring the flow of liquids
Assignee: Diessel GmbH and Co
•
Filing: 1973-09-07
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Granted: 1975-04-01
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Expires: 1993-09-07
Abstract
Abstract A rotary piston meter for measuring the flow of liquids, in which the rotary piston is provided with at least one magnet which acts on a primary element disposed outside the meter chamber, characterized in that the magnet (3) is arranged in the rotary piston (1) perpendicular to its plane of movement and is adapted to move during its rotation in an annular track disposed opposite to the primary element (10) which is provided with at least one counterpole (14) and is coaxially arranged in the meter housing (4).
Inventors
- 👤 Ulrich Christian Sanden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/04; G01F3/06; G01F3/08; G01F15/00; G01F15/07; G01F15/075; G01F15/0755
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
A rotary piston meter for measuring the flow of liquids having a housing with a first cylindrical compartment and a second cylindrical compartment, said compartments separated by a vertical wall, said compartments located coaxial on a horizontal axis perpendicular to said vertical wall, an annular track located in said first compartment perpendicular to said horizontal axis, a rotary piston located in said first compartment having at least one magnet (3) parallel to said horizontal axis and adapted to move during its rotation in said annular track, a primary element (10) located in said second compartment provided with counterpoles (14) opposite said annular track, said counterpoles defined by diagonally opposite free ends (18) bent outwardly at right angles of a U-shaped conductive strip (17) of ferromagnetic material, said conductive strip (17) having a crossbar (21) and at least one semi-conductor element located in proximity to said cross-bar (21).
Claim 2
Dependent Claim
147 words
A rotary piston meter for measuring the flow of liquids having a housing with a first cylindrical compartment and a second cylindrical compartment, said compartments separated by a vertical wall, said compartments located coaxial on a horizontal axis perpendicular to said vertical wall, an annular track located in said first compartment perpendicular to said horizontal axis, a rotary piston located in said first compartment having at least one magnet (3) parallel to said horizontal axis and adapted to move during its rotation in said annular track, a primary element (10) located in said second compartment provided with counterpoles (14) opposite said annular track, said counterpoles defined by diagonally opposite free ends (18) bent outwardly at right angles of a U-shaped conductive strip (17) of ferromagnetic material, said conductive strip (17) having a crossbar (21) and at least one semi-conductor element located in proximity to said cross-bar (21).
Claim 3
Dependent Claim
29 words
A rotary piston meter according to claim 1, wherein said magnet (3) is coaxially disposed in said rotary piston (1) in a central journal (2) of said rotary piston.
Claim 4
Dependent Claim
16 words
A rotary piston meter according to claim 1, wherein said semi-conductor element is a Hall generator.
Claim 5
Dependent Claim
25 words
A rotary piston meter according to claim 3, wherein said semi-conductor element and said conductive strips (17) are disposed sealed in a primary element housing.
Claim 6
Dependent Claim
28 words
A rotary piston meter according to claim 4, wherein said primary element housing has a free end provided with a screw coupling (26) provided with a cap nut.
Claim 7
Dependent Claim
28 words
A rotary piston meter according to claim 1, wherein Two Hall generators (20) are disposed in the region of the cross-bar (21) of the U-shaped conductive strip (17).
Claim 8
Dependent Claim
30 words
A rotary piston meter according to claim 1, wherein an impulse multiplying device (30, 31) with a corresponding impulse counter (32) is connected in series with the primary element (10).
Claim 9
Dependent Claim
31 words
A rotary piston meter according to claim 7, wherein said impulse multiplying device consists of an impulse generator (30), the impulses of which are supplied to a gate step connection (31).
Claim 10
Dependent Claim
32 words
A rotary piston meter according to claim 1, wherein a frequency dependent impulse control step (28) which blocks the metering at low frequencies, is connected in series with the primary element (10).
Claim 11
Dependent Claim
24 words
A rotary piston meter according to claim 9, wherein said impulse control step (28) comprises a digital filter (29) consisting of integrated semi-conductor components.
Claim 12
Dependent Claim
48 words
A rotary piston meter according to claim 10, wherein a decade divider step (34) is connected in series with the impulse multiplying device, said divider step (34) retracing the number of secondary impulses to the magnitude of the number of primary impulses coming from the primary element (10).
Claim 13
Dependent Claim
16 words
A rotary piston meter according to claim 1, wherein said semi-conductor element is a field plate.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |