US3390611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid digital positioner
Assignee: United States Department of the Army
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Filing: 1966-11-25
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Granted: 1968-07-02
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Expires: 1986-11-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:57
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/001; F15B11/00; F15B11/08; F15B11/12; F15B11/121; G; G05; G05B; G05B19/00; G05B19/43; G05B19/44; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A DIGITAL FLUID POSITIONER SYSTEM COMPRISING A CLOSED, ELONGATED CASING CARRYING A LONGITUDINALLY MOVABLE WALL MEMBER ACTING TO SEPARATE THE CASING INTO OPPOSED FLUID WORKING CHAMBERS, A PLURALITY OF BISTABLE FLUID AMPLIFIERS, EACH HAVING A PAIR OF FLUID OUTLETS, THE FLUID OUTLETS FOR EACH AMPLIFIER BEING COUPLED TO THE CASING AT LONGITUDINALLY SPACED POSITIONS ON OPPOSITE SIDES OF SAID MOVABLE WALL MEMBER WHEN SAID WALL MEMBER IS POSITIONED CANTRALLY OF SAID CASING, AND MEANS FOR SELECTIVELY SWITCHING SAID FLUID AMPLIFIERS WHEREBY SAID MOVABLE WALL MEMBER SEEKS A POSITION LONGITUDINALLY WITHIN SAID CASING SUCH THAT EACH WORKING CHAMBER HAS THE SAME NUMBER OF FLUID OUTLETS PASSING POWER STREAM FLUID FROM SAID WORKING CHAMBER TO SAID AMPLIFIERS AS OUTLETS DELIVERING POWER STREAM FLUID FROM THE FLUID AMPLIFIERS TO THE CHAMBER ITSELF.
References Cited (Backward Citations)
US3181546A
Cited
US3248053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |