US3587397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acceleration-deceleration pneumatic device
Assignee: Boeing North American Inc
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Filing: 1968-09-30
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Granted: 1971-06-28
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Expires: 1988-09-30
Abstract
Abstract A SINGLE PNEUMATIC CYLINDER IS DESCRIBED WHEREIN GAS PRESSURE APPLIED TO ONE FACE OF A PISTON ACCELERATES THE PISTON FOR A PORTION OF A STROKE, WHEREUPON THE PISTON REACHES A GAS RELIEF REGION WHICH PERMITS GAS TO FLOW TO THE OPPOSITE SIDE OF THE PISTON WHERE IT IS COMPRESSED TO DECELERATE THE PISTON ORIFICE MEANS ARE PROVIDED FOR LIMITING GAS FLOW FROM THE SECOND END OF THE CYLINDER FOR CONTROLLING DECELERATION TO BRING THE PISTON TO A STOP AT THE END OF THE STROKE WITHOUT SUBSTANTIAL IMPACT OR REBOUND AND WITHOUT CEASING THE FLOW OF PRESSURIZING GAS USED FOR ACCELERATING THE PISTON.
Inventors
- 👤 Berge Hagopian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:00
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B11/00; F15B11/06; F15B15/222
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 |