US3217728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque motor servo valve assembly
Assignee: American Brake Shoe Co
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Filing: 1962-11-13
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Granted: 1965-11-16
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 John B Pegram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:51
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A TORQUE MOTOR COMPRISING A BASE, A PERMANENT MAGNET MOUNTED ON SAID BASE, SAID PERMANENT MAGNET HAVING FOUR POLE FACES IN TWO PAIRS SPACED LONGITUDINALLY OF SAID MAGNET, A HOLLOW, FLEXIBLE TUBE MOUNTED AT ONE END IN SAID BASE, A PENDULAR MEMBER POSITIONED INTERIORLY OF AND SPACED FROM THE WALL OF SAID FLEXIBLE TUBE AND PROJECTING FROM ONE END OF SAID FLEXIBLE TUBE AT THE BASE, AND CONNECTED TO SAID FLEXIBLE TUBE AT THE OTHER END OF SAID FLEXIBLE TUBE, AN ARMATURE EXTENDING ALONG THE LONGITUDINAL LENGTH OF THE FLEXIBLE TUBE AND CONNECTED ADJACENT ONE END OF THE ARMATURE TO THE FLEXIBLE TUBE AND POSITIONED BETWEEN SAID POLE FACES AND CONNECTED TO SAID FLEXIBLE TUBE AT SAID OTHER END; SAID PAIRS OF POLE FACES BEING ALSO SPACED LONGITUDINALLY OF SAID ARMATURE AND SAID FLEXIBLE TUBE AND A PAIR OF ELECTROMAGNETIC FIELD COILS POSITIONED ABOUT SAID ARMATURE.
Claim 2
Dependent Claim
146 words
A TORQUE MOTOR COMPRISING A BASE, A PERMANENT MAGNET MOUNTED ON SAID BASE, SAID PERMANENT MAGNET HAVING FOUR POLE FACES IN TWO PAIRS SPACED LONGITUDINALLY OF SAID MAGNET, A HOLLOW, FLEXIBLE TUBE MOUNTED AT ONE END IN SAID BASE, A PENDULAR MEMBER POSITIONED INTERIORLY OF AND SPACED FROM THE WALL OF SAID FLEXIBLE TUBE AND PROJECTING FROM ONE END OF SAID FLEXIBLE TUBE AT THE BASE, AND CONNECTED TO SAID FLEXIBLE TUBE AT THE OTHER END OF SAID FLEXIBLE TUBE, AN ARMATURE EXTENDING ALONG THE LONGITUDINAL LENGTH OF THE FLEXIBLE TUBE AND CONNECTED ADJACENT ONE END OF THE ARMATURE TO THE FLEXIBLE TUBE AND POSITIONED BETWEEN SAID POLE FACES AND CONNECTED TO SAID FLEXIBLE TUBE AT SAID OTHER END; SAID PAIRS OF POLE FACES BEING ALSO SPACED LONGITUDINALLY OF SAID ARMATURE AND SAID FLEXIBLE TUBE AND A PAIR OF ELECTROMAGNETIC FIELD COILS POSITIONED ABOUT SAID ARMATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |