US3418662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic hand with improved control system for activation by electromyogram signals
Assignee: National Research Development Corp UK
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Filing: 1966-03-29
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Granted: 1968-12-31
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Expires: 1986-03-29
Abstract
No abstract record available.
Inventors
- 👤 Bottomley Alastair Howard
- 👤 Styles Peter Robert Dennis
- 👤 Jilbert Phillip Harvey
- 👤 Birtill John William
- 👤 Truscott John Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:37
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/68; A61F2/70; A61F2/72; A61F2/54; A61F2/58; A61F2/583; A61F2002/6827; A61F2002/701; A61F2/76; A61F2002/7615; A61F2002/7635
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROSTHETIC DEVICE HAVING A PROSTHETIC LIMB AND A CONTROL SYSTEM FOR ACTUATING SAID LIMB WHEREIN THE IMPROVEMENT RESIDES IN THE CONTROL SYSTEM COMPRISING, MEANS FOR DERIVING A CONTROL SIGNAL FROM EMG SIGNALS, DRIVE MEANS, A CLOSED LOOP FEEDBACK SYSTEM IN WHICH THE CONTROL SIGNAL IS MODIFIED BY A VELOCITY FEEDBACK SIGNAL AND A FORCE FEEDBACK SIGNAL TO OBTAIN AN ERROR SIGNAL TO OPERATE THE DRIVE MEANS, AND SWITCH MEANS FOR RENDERING THE DRIVE MEANS INOPERATIVE WHENEVER THE DIFFERENCE BETWEEN THE FORCE FEEDBACK SIGNAL AND THE CONTROL SIGNAL IS LESS THAN A PREDETERMINED AMOUNT.
Claim 2
Dependent Claim
95 words
IN A PROSTHETIC DEVICE HAVING A PROSTHETIC LIMB AND A CONTROL SYSTEM FOR ACTUATING SAID LIMB WHEREIN THE IMPROVEMENT RESIDES IN THE CONTROL SYSTEM COMPRISING, MEANS FOR DERIVING A CONTROL SIGNAL FROM EMG SIGNALS, DRIVE MEANS, A CLOSED LOOP FEEDBACK SYSTEM IN WHICH THE CONTROL SIGNAL IS MODIFIED BY A VELOCITY FEEDBACK SIGNAL AND A FORCE FEEDBACK SIGNAL TO OBTAIN AN ERROR SIGNAL TO OPERATE THE DRIVE MEANS, AND SWITCH MEANS FOR RENDERING THE DRIVE MEANS INOPERATIVE WHENEVER THE DIFFERENCE BETWEEN THE FORCE FEEDBACK SIGNAL AND THE CONTROL SIGNAL IS LESS THAN A PREDETERMINED AMOUNT.
References Cited (Backward Citations)
SU163718A1
Cited
US3026534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |