Patent US3559197A successfully refreshed from Google Patents.
US3559197A
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Assignee: Acme Machine Works Inc
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Filing: 1968-03-29
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Granted: 1971-01-26
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Expires: 1988-03-29
Abstract
Abstract THIS DISCLOSURE DESCRIBES A FLOW INDICATOR WHICH MAY INCLUDE A HOUSING HAVING A FLOW PASSAGEWAY THEREIN AND A VANE PIVOTALLY MOUNTED IN SAID HOUSING WITH AT LEAST A PORTION OF THE VANE LYING IN THE FLOW PASSAGEWAY. THE VANE PIVOTS IN RESPONSE TO FLUID FLOW THROUGH THE FLOW PASSAGEWAY AND MEANS RESPONSIVE TO THE PIVOTAL MOVEMENT OF THE VANE PROVIDES A SIGNAL OR INDICATION OF THE FLOW CONDITION IN THE PASSAGEWAY. PREFERABLY, THE VANE INCLUDES FIRST AND SECOND VANE SECTIONS WHICH ARE PIVOTABLE INDEPENDENTLY SO THAT ONE OF THE VANE SECTIONS, UNDER RELATIVELY HIGH FLOW CONDITIONS, CAN BE PIVOTED TO SUBSTANTIALLY REDUCE THE AMOUNT OF RESISTANCE TO FLUID FLOW PROVIDED THEREBY.
Inventors
- 👤 Samuel M Jarvis
- 👤 Julius P Striegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; G01P13/0033; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |