Patent DE63375C successfully refreshed from Google Patents.
US3979955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: LUDWIG GREFE GmbH
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Filing: 1974-12-02
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Granted: 1976-09-14
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Expires: 1994-12-02
Abstract
Abstract A flowmeter utilizes an impingement plate as a measuring element, which is attached to yieldably resilient means, such as a tension or compression spring, elastic rubber or the like rod or tube disposed along the longitudinal axis of a tapered transparent sleeve within a housing inserted into a conduit through which a fluid, whose flow is to be measured, causes the deviation of the plate from a normal position depending on the volume rate of flow of fluid, passing through the tube and being readable on a scale.
Inventors
- 👤 Fritz Schulte
- 👤 Gerhard Clever
- 👤 Gunter Kuhfs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A flowmeter comprising: an elongated housing formed with an annular inlet fitting at one end, an annular outlet fitting at the opposite end, and means connecting said fittings whereby said fittings are attachable to respective portions of a pipe line in which the flowmeter is insertable, said fittings having axially aligned openings adapted to be traversed by a fluid in said pipeline; a frustoconical measuring tube disposed within said housing and tapering from said outlet fitting toward said inlet fitting, said tube being of substantially uniform well thickness; a planar imperforate circular disk disposed within said tube and lying transverse to the axis thereof while being of a diameter greater than the smallest internal diameter of said tube, said disk contacting said tube with only line contact; a resilient element anchored to one of said fittings and bearing axially upon said disk for urging same toward the narrow end of said tube and the periphery thereof into engagement with a frustoconical wall of the tube at the narrow end thereof, said element being the sole means connecting said disk to said fittings; and a scale mounted along said tube and cooperating with said disk for indicating the flow rate of a fluid traversing said tube from said inlet fitting to said outlet fitting upon deflection of said disk by the flowing fluid.
Claim 2
Dependent Claim
222 words
A flowmeter comprising: an elongated housing formed with an annular inlet fitting at one end, an annular outlet fitting at the opposite end, and means connecting said fittings whereby said fittings are attachable to respective portions of a pipe line in which the flowmeter is insertable, said fittings having axially aligned openings adapted to be traversed by a fluid in said pipeline; a frustoconical measuring tube disposed within said housing and tapering from said outlet fitting toward said inlet fitting, said tube being of substantially uniform well thickness; a planar imperforate circular disk disposed within said tube and lying transverse to the axis thereof while being of a diameter greater than the smallest internal diameter of said tube, said disk contacting said tube with only line contact; a resilient element anchored to one of said fittings and bearing axially upon said disk for urging same toward the narrow end of said tube and the periphery thereof into engagement with a frustoconical wall of the tube at the narrow end thereof, said element being the sole means connecting said disk to said fittings; and a scale mounted along said tube and cooperating with said disk for indicating the flow rate of a fluid traversing said tube from said inlet fitting to said outlet fitting upon deflection of said disk by the flowing fluid.
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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |