Fluid metering device
Abstract
Abstract THE INVENTION CONCERNS A FLUID METERING DEVICE COMPRISING A CYLINDERICAL MEMBER, FIRST AND SECOND AXIALLY SPACED APART TUBULAR MEMBER WHICH ARE DISPOSED CONCENTRICALLY OF THE CYLINDRICAL MEMBER AND ARE NESTED CLOSELY WITH THE LATTER, EACH OF THE SAID CYLINDRICAL AND TUBULAR MEMBERS BEING RELATIVELY MOVABLE AXIALLY WITH RESPECT TO EACH OF THE OTHER SAID MEMBERS, THE CYLINDRICAL MEMBER BEING PROVIDED WITH FIRST AND SECOND AXIALLY SPACED APART APERTURES THE CROSS-SECTIONAL AREA OF EACH OF WHICH VARIES AXIALLY, THE FIRST AND SECOND APERTURES BEING RESPECTIVELY ADAPTED TO BE OBSTURATED BY THE FIRST AND SECOND TUBULAR MEMBERS TO AN EXTENT DEPENDENT UPON THE RELATIVE AXIAL POSITIONS OF THE CYLINDRICAL AND TUBULAR MEMBERS, AND APERTURE MEANS THROUGH WHICH MAY PASS FLUID WHICH HAS ENTERED, OR IS TO PASS OUT OF, THE CYLINDERICAL MEMBER THROUGH THE FIRST AND SECOND APERTURES, THE CYLINDRICAL AND TUBULAR MEMBERS BEING RELATIVELY MOVABLE AXIALLY SO AS TO VARY THE EFFECTIVE FLOW AREA OF SELECTED APERTURES ONLY AND SO AS TO VARY THE EFFECTIVE FLOW AREA OF BOTH THE FIRST THE SECOND APERTURES SIMULTANEOUSLY.
Inventors
- 👤 Christopher Linley Johnson
Bibliographic Details
Claims Analysis
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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) | 1974-06-27 | 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 |