Patent US4451207A successfully refreshed from Google Patents.
US4451207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine rotor for a flow meter
Assignee: Hydrotechnik GmbH
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Filing: 1982-04-01
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Granted: 1984-05-29
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Expires: 2002-04-01
Abstract
Abstract A turbine rotor for a flow meter comprises a cylindrical rotor disk having a rotor axis, a plurality of rotor vanes extending radially from the rotor disk and a flat surface between the bases of each of the vanes. This construction permits the efficient start-up of the turbine rotor at flows of low viscosity.
Inventors
- 👤 Helmuth Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/115
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A turbine rotor for flow meter comprising a cylindrical rotor disk having a rotor axis, a plurality of rotor vanes extending radially from said cylindrical rotor disk, at an angle of inclination β with said rotor axis, a flat surface between each of said rotor vanes wherein each flat surface abuts a vane on each side forming lines of abutment, said lines of abutment being parallel.
Claim 2
Dependent Claim
66 words
A turbine rotor for flow meter comprising a cylindrical rotor disk having a rotor axis, a plurality of rotor vanes extending radially from said cylindrical rotor disk, at an angle of inclination β with said rotor axis, a flat surface between each of said rotor vanes wherein each flat surface abuts a vane on each side forming lines of abutment, said lines of abutment being parallel.
Claim 3
Dependent Claim
13 words
The turbine rotor of claim 1, wherein said rotor vanes are flat plates.
Claim 4
Dependent Claim
46 words
The turbine rotor of claim 1, wherein the line normal to each flat surface located at an equal distance from a frontal surface of said rotor disk and extending from the central point of said flat surface intersect at the same point along said rotor axis.
Claim 5
Dependent Claim
29 words
The turbine rotor of claim 1, wherein line normals pass through the center of gravity of said flat plates and intersect at the same point along said rotor axis.
Claim 6
Dependent Claim
12 words
The turbine rotor of claim 3, wherein said frontal surfaces are flat.
Claim 7
Dependent Claim
18 words
The turbine rotor of claim 1, wherein said angle of inclination β is between about 20° and 30°.
Claim 8
Dependent Claim
10 words
The turbine rotor of claim 6, wherein β is 25°.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |