US3588076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-orifice device
Assignee: Boeing North American Inc
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Filing: 1968-12-20
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Granted: 1971-06-28
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Expires: 1988-12-20
Abstract
Abstract A SHOCK ABSORBER FORMED WITH A VALVE HAVING A VARIABLE SIZE ORIFICE WHOSE SIZE IS CONTROLLED AND DIRECTLY RELATED TO THE PRESSURE OF A PRESSURIZED FLUID. THE SIZE OF THE ORIFICE IS VARIED BY THE FLUID MOVING A MULTIAPERTURE MEMBER RELATIVE TO AN APERTURE-COVERING MEMBER SO THAT THE NUMBER OF APERTURES UNCOVERED INCREASES WITH PRESSURE. THE PRESSURIZED FLUID DISCHARGES, THROUGH THE UNCOVERED APERTURES, INTO A SUMP. THUS IS PROVIDED A SHOCK ABSORBER THAT PROVIDES VERY RAPID MOTION AT THE INITIATION OF A SHOCK WHICH MOTION DIMINISHES AT A MORE RAPID RATE THAN THE RATE THAT THE SHOCK DIMINISHES.
Inventors
- 👤 Robert L Ammerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:23
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/32; F16F9/48
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 |