Patent US3906793A successfully refreshed from Google Patents.
US3906793A
Expired / Lapsed
US
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Flow meter
Assignee: BP PLC
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Filing: 1973-10-26
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Granted: 1975-09-23
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Expires: 1993-10-26
Abstract
Abstract A flowmeter has a reciprocating membrane displacement unit and is fitted with an impulse transmitter. The impulse transmitter produces pulses which are counted by a counting mechanism, the number of pulses being dependent upon the position of the displacement unit. Further the impulse transmitter produces a plurality of impulses per stroke of the displacement unit, each pulse thus being allocated only to a relatively small volume.
Inventors
- 👤 Frank Wurzbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A flowmeter comprising: a housing defining a chamber suitable for containing a liquid; a membrane displacement unit within said housing, said unit including a membrane mounted in said housing across said chamber and dividing said chamber into two sections, the membrane being adapted to conform to the internal shape of said chamber section when subject to fluid pressure; each section having a fluid inlet valve and a non-return outlet valve, the inlet and outlet valve on opposite sides of said membrane being adapted to inflate and deflate the membrane to sweep the volume of the chamber; said displacement unit further including a rod extending outwardly on both sides of the membrane for movement in the direction of membrane movement; a plurality of impulse sensors located in staggered relationship to one another on both sides of the membrane to cooperate with said rod to produce impulses at predetermined positions of said membrane, each impulse being thus allocated to a fraction of the chamber volume and the impulses at the two extremes of movement of the membrane indicating the volume of the chamber; and counting means operatively coupled to the sensors to record said impulses.
Claim 2
Dependent Claim
193 words
A flowmeter comprising: a housing defining a chamber suitable for containing a liquid; a membrane displacement unit within said housing, said unit including a membrane mounted in said housing across said chamber and dividing said chamber into two sections, the membrane being adapted to conform to the internal shape of said chamber section when subject to fluid pressure; each section having a fluid inlet valve and a non-return outlet valve, the inlet and outlet valve on opposite sides of said membrane being adapted to inflate and deflate the membrane to sweep the volume of the chamber; said displacement unit further including a rod extending outwardly on both sides of the membrane for movement in the direction of membrane movement; a plurality of impulse sensors located in staggered relationship to one another on both sides of the membrane to cooperate with said rod to produce impulses at predetermined positions of said membrane, each impulse being thus allocated to a fraction of the chamber volume and the impulses at the two extremes of movement of the membrane indicating the volume of the chamber; and counting means operatively coupled to the sensors to record said impulses.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |