Patent US3587328A successfully refreshed from Google Patents.
US3587328A
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US
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A fluid-jet deflection type instrument having a diaphragm type pump with piezoelectric actuation
Assignee: Hercules LLC
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Filing: 1969-06-05
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Granted: 1971-06-28
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Expires: 1989-06-05
Abstract
Abstract A FLUID JET DEFLECTION TYPE INSTRUMENT FOR SENSING MOTION HAVING A PUMP COMPRISING A PAIR OF LAMINATED PIEZOELECTRIC ELEMENTS ENERGIZED TO EXPAND AND/OR CONTRACT ALTERNATELY SO THAT THE ELEMENTS VIBRATE IN THE NATURE OF A DIAPHRAGM PUMP, THE ELEMENTS HAVING A PUMP ORIFICE ALIGNED ACROSS AN INTAKE CHAMBER WITH AN OUTLET ORIFICE, WHEREBY FLUID IS DRAWN THROUGH THE PUMP ORIFICE WHEN THE ELEMENTS MOVE TO INCREASE THE VOLUME OF THE PUMP CHAMBER AND A CHARGE OF FLUID IS EXPELLED THROUGH THE PUMP ORIFICE AND CARRIES ACROSS THE INLET CHAMBER THROUGH THE OUTLET ORIFICE WHEN THE ELEMENTS MOVE TO DECREASE THE VOLUME OF PUMP CHAMBER.
Inventors
- 👤 Wilfred C Schuemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/26; F; F04; F04B; F04B17/00; F04B17/003; F04B43/00; F04B43/08; F04B43/09; F04B43/095; F04F; F04F7/00; H; H10; H10N; H10N30/00; H10N30/20; H10N30/204; H10N30/2047; H10N30/80; H10N30/802
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |