US3910114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual vane flow meter
Assignee: ROSAEN NILS O TRUSTEE OF NILS O ROSAEN REVOCABLE TRUST DATED JUNE 5 1985
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Filing: 1974-08-12
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Granted: 1975-10-07
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Expires: 1994-08-12
Abstract
Abstract A positive displacement flow meter comprising a housing, said housing having an inlet and an outlet, a first vane rotatably mounted on a first shaft and a second vane rotatably mounted on a second shaft, and meshing gear means carried by each shaft. Resilient means urge the vanes to a closed position whereby fluid communication is closed between the inlet and the outlet. Indicator means are carried by one of the shafts to provide a visual indication of the fluid flow rate through the flow meter.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:36
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A flow meter for a fluid system comprising: a housing having an inlet and an outlet adapted to be connected with said system, a first and second vane rotatably mounted in said housing intermediate said inlet and said outlet, means linking said vanes to provide equal rotation in opposite directions; said housing being provided with a substantially hemispherical interior wall section said first vane having a substantially semicircular edge rotatable adjacent one half of said hemispherical wall section and said second vane having a semicircular edge rotatable adjacent the second half of said hemispherical wall section, the center of said hemispherical wall section being displaced from the center of the hemisphere circumscribed by the semicircular edge upon rotation of said vanes whereby the space between the semicircular edges of said vanes and said hemispherical wall section varies at each rotated position of said vanes, and means indicating the position of one of said vanes exteriorly of said housing.
Claim 2
Dependent Claim
158 words
A flow meter for a fluid system comprising: a housing having an inlet and an outlet adapted to be connected with said system, a first and second vane rotatably mounted in said housing intermediate said inlet and said outlet, means linking said vanes to provide equal rotation in opposite directions; said housing being provided with a substantially hemispherical interior wall section said first vane having a substantially semicircular edge rotatable adjacent one half of said hemispherical wall section and said second vane having a semicircular edge rotatable adjacent the second half of said hemispherical wall section, the center of said hemispherical wall section being displaced from the center of the hemisphere circumscribed by the semicircular edge upon rotation of said vanes whereby the space between the semicircular edges of said vanes and said hemispherical wall section varies at each rotated position of said vanes, and means indicating the position of one of said vanes exteriorly of said housing.
Claim 3
Dependent Claim
44 words
The invention as defined in claim 1 wherein said first vane is fixed to a first shaft, said second vane is fixed to a second shaft, and said first and second shafts are rotatably mounted in said housing in a spaced and parallel relationship.
Claim 4
Dependent Claim
22 words
The invention as defined in claim 2 and including resilient means urging at least one of said shafts in one rotational direction.
Claim 5
Dependent Claim
15 words
The invention as defined in claim 3 wherein said resilient means is a coil spring.
Claim 6
Dependent Claim
29 words
The invention as defined in claim 1, and in which the radius of each of said vanes is substantially the same as the radius of said hemispherical wall section.
Claim 7
Dependent Claim
64 words
The invention as defined in claim 2 and in which said last mentioned means comprises a pointer arm secured onto the end of one of said shafts and generally normal thereto, and an indicia carrying plate adjacent to the outer end of said pointer arm wherein the plane of said indicia carrying plate is substantially normal to the axis of said last mentioned shaft.
Claim 8
Dependent Claim
26 words
The invention as defined in claim 2 and in which each of said shafts has a gear secured thereto, said gears being in a meshing engagement.
Claim 9
Dependent Claim
16 words
The invention as defined in claim 7 wherein said gears are substantially identical to each other.
References Cited (Backward Citations)
US3282102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |