US3301141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically damped pneumatic control devices
Assignee: Fairchild Hiller Corp
•
Filing: 1964-10-20
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Granted: 1967-01-31
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Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert S Griffing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:03
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/03; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PNEUMATIC CONTROL DEVICE COMPRISING: PRESSURE RESPONSIVE MEANS ADAPTED TO BE MOVED IN RESPONSE TO CHANGES IN PRESSURE OF A PNEUMATIC FLUID, A HEAD ON SAID PRESSURE RESPONSIVE MEANS, AT LEAST A PORTION OF SAID HEAD BEING OF A MAGNETICALLY RESPONSIVE MATERIAL, A MAGNET FOR DAMPING THE MOTION OF SAID HEAD LOCATED WITH RESPECT TO SAID HEAD SO THAT AT LEAST A PORTION OF THE MAGNETIC FLUX PRODUCED BY THE MAGNET EXERTS A FORCE ON THE HEAD THROUGH A VARIABLE DISTANCE GAP BETWEEN SAID HEAD AND SAID MAGNET, MEANS ON SAID MAGNET ESTABLISHING A SHUNT GAP FOR FLUX OF THE MAGNET, THE FLUX THROUGH SAID SHUT GAP TENDING TO BE TRANSFERRED TO SAID VARIABLE GAP AS SAID HEAD MOVES CLOSER TO SAID MAGNET, AND MEANS FOR IMPEDING THE TRANSFER OF FLUX FROM SAID SHUT GAP TO SAID VARIABLE GAP.
Claim 2
Dependent Claim
139 words
A PNEUMATIC CONTROL DEVICE COMPRISING: PRESSURE RESPONSIVE MEANS ADAPTED TO BE MOVED IN RESPONSE TO CHANGES IN PRESSURE OF A PNEUMATIC FLUID, A HEAD ON SAID PRESSURE RESPONSIVE MEANS, AT LEAST A PORTION OF SAID HEAD BEING OF A MAGNETICALLY RESPONSIVE MATERIAL, A MAGNET FOR DAMPING THE MOTION OF SAID HEAD LOCATED WITH RESPECT TO SAID HEAD SO THAT AT LEAST A PORTION OF THE MAGNETIC FLUX PRODUCED BY THE MAGNET EXERTS A FORCE ON THE HEAD THROUGH A VARIABLE DISTANCE GAP BETWEEN SAID HEAD AND SAID MAGNET, MEANS ON SAID MAGNET ESTABLISHING A SHUNT GAP FOR FLUX OF THE MAGNET, THE FLUX THROUGH SAID SHUT GAP TENDING TO BE TRANSFERRED TO SAID VARIABLE GAP AS SAID HEAD MOVES CLOSER TO SAID MAGNET, AND MEANS FOR IMPEDING THE TRANSFER OF FLUX FROM SAID SHUT GAP TO SAID VARIABLE GAP.
References Cited (Backward Citations)
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |