Patent US3855859A successfully refreshed from Google Patents.
US3855859A
Expired / Lapsed
US
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Flowmeter
Assignee: Moore Products Co
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Filing: 1973-08-20
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Granted: 1974-12-24
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Expires: 1993-08-20
Abstract
Abstract A flowmeter is provided having a through passageway for the flow to be measured with a fluid interaction chamber and feedback means to provide an oscillation of the flow. The frequency of this oscillation is linearly and proportionally related to volume rate of flow and is independent of all fluid properties in the turbulent range, i.e., the frequency for a given volume flow rate will be the same for any liquid or gas as long as the flow is turbulent. Provisions are made for detecting this oscillation and a sensor is provided which is responsive to changes in the heat transfer rates to the surrounding media. An equalizing chamber is provided intermediate the ends of the fluid interaction chamber which is connnected to the exhaust to give a more uniform response over a wider range of flows.
Inventors
- 👤 R Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:21
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/22; G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/32; G01F1/3227; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2273
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A fluid oscillator comprising means directing a fluid stream therethrough and imparting to the fluid of said stream an oscillation whose frequency is directly proportional to the velocity of the fluid stream, said means including an elongated interaction chamber bounded by a pair of spaced walls and substantially normal thereto a pair of diverging side walls for fluid jet attachment, a nozzle at one end of said chamber for directing a fluid jet into said chamber, a discharge passageway at the other end of said chamber through which all the fluid from said nozzle is discharged, control ports communicating with said chamber contiguous to said nozzle, and feedback passageways connected to said control ports from locations in said chamber upstream of said discharge passageway and downstream of said side walls, said locations being aligned with the fluid jet attached to said side walls, said side walls intermediate their ends having recessed reGions with a transverse equalizing passageway therebetween.
Claim 2
Dependent Claim
158 words
A fluid oscillator comprising means directing a fluid stream therethrough and imparting to the fluid of said stream an oscillation whose frequency is directly proportional to the velocity of the fluid stream, said means including an elongated interaction chamber bounded by a pair of spaced walls and substantially normal thereto a pair of diverging side walls for fluid jet attachment, a nozzle at one end of said chamber for directing a fluid jet into said chamber, a discharge passageway at the other end of said chamber through which all the fluid from said nozzle is discharged, control ports communicating with said chamber contiguous to said nozzle, and feedback passageways connected to said control ports from locations in said chamber upstream of said discharge passageway and downstream of said side walls, said locations being aligned with the fluid jet attached to said side walls, said side walls intermediate their ends having recessed reGions with a transverse equalizing passageway therebetween.
Claim 3
Dependent Claim
21 words
A fluid oscillator as defined in claim 1 in which said equalizing passageway has a connection therefrom to said discharge passageway.
Claim 4
Dependent Claim
20 words
A fluid oscillator as defined in claim 1 in which a member is provided responsive to the interior fluid oscillation.
Claim 5
Dependent Claim
31 words
A fluid oscillator as defined in claim 1 in which a member is provided in one of said feedback passageways responsive to said fluid oscillation for transmitting a signal related thereto.
Claim 6
Dependent Claim
170 words
A flow-sensitive device comprising a body having wall portions providing, a fluid inlet nozzle having a connection to a source of fluid for providing a fluid jet, said nozzle passing all of the flow to be measured, an interaction chamber with which said nozzle is in communication, said interaction chamber having opposite diverging side walls for fluid jet attachment and a discharge passageway, control ports communicating with said chamber contiguous to said nozzle, feedback means connected to said interaction chamber upstream of said discharge passageway and having inlets aligned with the jet attached to said side walls to receive a portion of fluid coming from said fluid inlet nozzle and extending to said control ports for switching the fluid from said nozzle successively with respect to said side walls for establishing a fluid oscillation, and said diverging side walls between said control ports and said feedback means inlets having recessed regions interconnected by an equalizing passageway, and a member responsive to said fluid oscillation for transmitting a signal related thereto.
Claim 7
Dependent Claim
170 words
A flow-sensitive device comprising a body having wall portions providing, a fluid inlet nozzle having a connection to a source of fluid for providing a fluid jet, said nozzle passing all of the flow to be measured, an interaction chamber with which said nozzle is in communication, said interaction chamber having opposite diverging side walls for fluid jet attachment and a discharge passageway, control ports communicating with said chamber contiguous to said nozzle, feedback means connected to said interaction chamber upstream of said discharge passageway and having inlets aligned with the jet attached to said side walls to receive a portion of fluid coming from said fluid inlet nozzle and extending to said control ports for switching the fluid from said nozzle successively with respect to said side walls for establishing a fluid oscillation, and said diverging side walls between said control ports and said feedback means inlets having recessed regions interconnected by an equalizing passageway, and a member responsive to said fluid oscillation for transmitting a signal related thereto.
Claim 8
Dependent Claim
22 words
A flow-sensitive device as defined in claim 5 in which said equalizing passageway has a venting connection therefrom to said discharge passageway.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |