Patent US3820168A successfully refreshed from Google Patents.
US3820168A
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US
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System for operating a prosthetic limb
Assignee: Otto Bock Orthopädische Industrie KG
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Filing: 1972-09-11
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Granted: 1974-06-28
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Expires: 1992-09-11
Abstract
Abstract A SERVOMOTOR FOR MOVING A PROSTHETIC LIMB IS ACTUATED BY A CONTROLLER WHICH RESPONDS TO LOCAL VARIATIONS IN MUSCULAR RIGIDITY AS DETERMINED BY ONE OR MORE PRESSURE SENSORS BEARING UPON THE FLESH OF THE WEARER WITHIN AN ANNUAL FRAME CONTACTING AN AREA OF HIS BODY. THE FRAME MAY BE RESILIENTLY SUPPORTED IN A CUTOUT OF A RIGID SLEEVE BY ONE OR MORE SPRINGS URGING IT INTO CONTACT WITH AN UNDERLYING STUMP. THE CONTACTS OF THE SENSOR FORM PART OF AN ELECTROMAGNETIC VIBRATOR WHOSE OSCILLATIONS, FELT BY THE USER, ARE MODULATED BY A FEEDBACK SIGNAL CONTROLLED BY THE POSITION OR THE SPEED OF THE PROSTHETIC LIMB.
Inventors
- 👤 E Horvath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/68; A61F2/70; A61F2/72; A61F2/54; A61F2/58; Y; Y10; Y10S; Y10S200/00; Y10S200/02
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |